@inproceedings{CarlHochmann2021, author = {Carl, Ann-Kathrin and Hochmann, David}, title = {Regulatory Framework for 3D Printed Custom-Made Devices in Europe}, series = {Beitrag zur 3. Additive Manufacturing Meets Medicine (AMMM) Konferenz}, booktitle = {Beitrag zur 3. Additive Manufacturing Meets Medicine (AMMM) Konferenz}, issn = {2699-1977}, doi = {10.18416/AMMM.2021.2109542}, year = {2021}, abstract = {Additive manufacturing (AM) has been growing continuously over the past 20 years, enabling unprecedented tailoring to the anatomy of each patient. In Europe, custom-made devices qualify for an exemption and pass a simplified approval process. New technologies, like AM, provoke questions about the adequacy of the current regulatory framework for custom-made devices. This article addresses the regulatory requirements for such devices in Europe and discusses the implications for AM. It concludes that the legal framework for custom-made devices entails uncertainties which need to be resolved to guide manufacturers through the regulatory requirements, highlighting the specific areas of focus for AM.}, language = {en} } @article{Carl2021, author = {Carl, Ann-Kathrin}, title = {Ergebnisse einer Umfrage der FH M{\"u}nster. MDR und die Hilfsmittelbranche}, series = {MTD Medizintechnischer Dialog}, volume = {47}, journal = {MTD Medizintechnischer Dialog}, number = {10}, issn = {0935-137X}, pages = {16 -- 18}, year = {2021}, language = {de} } @article{CarlHochmann2021, author = {Carl, Ann-Kathrin and Hochmann, David}, title = {MDR - Wie gut vorbereitet ist die Hilfsmittelbranche?}, series = {mt-medizintechnik}, volume = {141}, journal = {mt-medizintechnik}, number = {2}, issn = {0344-9416}, pages = {34 -- 39}, year = {2021}, abstract = {Im Mittelpunkt der Medizintechnikbranche stand in den letzten Jahren fast ausschließlich ein Thema: die Medical Device Regulation, kurz MDR. Mit Inkrafttreten der MDR steigen die regulatorischen Anforderungen f{\"u}r alle Akteure der Medizintechnikbranche in ganz Europa. Vor allem kleine und mittelst{\"a}ndische Unternehmen werden durch die Implementierung der MDR vor Herausforderungen gestellt. Das Ziel der durchgef{\"u}hrten Online-Befragung war es, ein umfassendes Erfahrungs- und Meinungsbild hinsichtlich der Akzeptanz und Umsetzbarkeit der MDR zu gewinnen. Hierf{\"u}r wurden H{\"a}ndler und Hersteller orthop{\"a}discher Hilfsmittel im Januar und Februar 2021 deutschlandweit anonymisiert befragt. In diesem Artikel werden die Ergebnisse der Umfrage ausf{\"u}hrlich dargestellt und diskutiert.}, language = {de} } @article{HinricherPawelzikBackhaus2021, author = {Hinricher, N. and Pawelzik, L. and Backhaus, C.}, title = {Investigation of Impulse Oscillometry for the Detection of Extravasations using Design of Experiments and an Infusion Simulator}, series = {Medical Engineering and Physics}, volume = {92}, journal = {Medical Engineering and Physics}, number = {19}, issn = {1350-4533}, doi = {10.1016/j.medengphy.2021.04.002}, pages = {33 -- 39}, year = {2021}, language = {en} } @inproceedings{HinricherKoenigBackhaus2021, author = {Hinricher, N. and K{\"o}nig, S. and Backhaus, C.}, title = {Usability-Evaluation von Steuerst{\"a}nden mittels Wizard-of-Oz Methode und Klickdummies am Beispiel eines Prototyps zur Steuerung einer Onshore-Bohranlage}, series = {Beitrag zum 67. Kongress der Gesellschaft f{\"u}r Arbeitswissenschaft}, booktitle = {Beitrag zum 67. Kongress der Gesellschaft f{\"u}r Arbeitswissenschaft}, publisher = {Dortmund}, address = {GfA-Press}, isbn = {978-3-936804-29-4}, pages = {C.3.2}, year = {2021}, language = {de} } @inproceedings{KoenigHinricherBackhaus2021, author = {K{\"o}nig, S. and Hinricher, N. and Backhaus, C.}, title = {Physisches Modell oder virtueller Prototyp? Ein vergleichender Usability-Test am Beispiel eines Blutdruckmessger{\"a}tes}, series = {Beitrag zum 67. Kongress der Gesellschaft f{\"u}r Arbeitswissenschaft}, booktitle = {Beitrag zum 67. Kongress der Gesellschaft f{\"u}r Arbeitswissenschaft}, publisher = {GfA-Press}, address = {Dortmund}, isbn = {978-3-936804-29-4}, pages = {A.7.3}, year = {2021}, language = {de} } @inproceedings{IbenthalKehmannBackhaus2021, author = {Ibenthal, E. and Kehmann, M. and Backhaus, C.}, title = {Arbeitswissenschaftliche Analyse zum Verhalten von Menschen mit Demenz in station{\"a}ren Pflegeeinrichtungen unter Einfluss personalisierter Musik}, series = {Beitrag zum 67. Kongress der Gesellschaft f{\"u}r Arbeitswissenschaft}, booktitle = {Beitrag zum 67. Kongress der Gesellschaft f{\"u}r Arbeitswissenschaft}, publisher = {GfA-Press}, address = {Dortmund}, isbn = {978-3-936804-29-4}, pages = {C.3.1}, year = {2021}, language = {de} } @article{PawelzikBackhaus2021, author = {Pawelzik, L. and Backhaus, C.}, title = {Evaluation of Impuls-Oscillometric Extravasatio Prevention}, series = {Medical Engineering and Physics}, volume = {88}, journal = {Medical Engineering and Physics}, issn = {1350-4533}, doi = {10.1016/j.medengphy.2020.12.004}, pages = {54 -- 58}, year = {2021}, language = {en} } @inproceedings{NguyenMartinaKernagisetal.2021, author = {Nguyen, K. and Martina, S. and Kernagis, D. and Bershad, E. and Clark, J. and Hinricher, N. and Backhaus, C.}, title = {Effekt of repetetive, successive oculometric testing an saccades, smooth pursuit, and visual reaction times for future head down bed rest study (HDBR) applikations}, series = {Contribution to the NASA Online-Conference for Advancing Human Space Flight Research Through Innovation and Collaboration}, booktitle = {Contribution to the NASA Online-Conference for Advancing Human Space Flight Research Through Innovation and Collaboration}, year = {2021}, language = {en} } @article{IbenthalKehmannBackhaus2021, author = {Ibenthal, E. and Kehmann, M. and Backhaus, C.}, title = {Effectiveness of personalized music systems to influence neuropsychiatric symptoms associated with dementia: a quasi-experimental study}, series = {EXPLORE: The Journal of Science \& Healing}, volume = {18}, journal = {EXPLORE: The Journal of Science \& Healing}, doi = {10.1016/j.explore.2021.03.004}, pages = {319 -- 326}, year = {2021}, language = {en} } @inproceedings{BackhausHaimerl2021, author = {Backhaus, C. and Haimerl, G.}, title = {Engineers in Clinical Perfusion}, series = {Contribution to the 59th International Conference of the American Society for Extracorpreal Technology. AmSECT International Online Conference}, booktitle = {Contribution to the 59th International Conference of the American Society for Extracorpreal Technology. AmSECT International Online Conference}, year = {2021}, language = {en} } @article{Backhaus2021, author = {Backhaus, C.}, title = {Das Ende der {\"U}bergangsfrist der MDR - Gewinn oder Risiko f{\"u}r die Patientensicherheit?}, series = {mt-Medizintechnik}, volume = {141}, journal = {mt-Medizintechnik}, number = {4}, issn = {0344-9416}, pages = {2 -- 3}, year = {2021}, language = {de} } @article{IbenthalBackhaus2021, author = {Ibenthal, E. and Backhaus, C.}, title = {Arbeit in der station{\"a}ren Demenzpflege - Unterschiede zwischen einer Pflegefachkraft, Pflegeassistenz und Betreuungskraft}, series = {Zentralbl. Arbeitsmed}, volume = {71}, journal = {Zentralbl. Arbeitsmed}, doi = {10.1007/s40664-021-00442-w}, pages = {270 -- 280}, year = {2021}, language = {de} } @inproceedings{KoenigKlebschOstermannetal.2021, author = {K{\"o}nig, S. and Klebsch, L. and Ostermann, R. and Hinricher, N. and Kaluza, M. and Walter, S. and Heemels, H. and Backhaus, C.}, title = {Anwendbarkeit von Augmented Reality Systemen f{\"u}r eine unterst{\"u}tzte Fehlerbehebung an ECMO/ECLS-Systemen auf Intensivstationen}, series = {Beitrag zur 50. Internationalen Jahrestagung der Deutschen Gesellschaft f{\"u}r Kardiotechnik}, booktitle = {Beitrag zur 50. Internationalen Jahrestagung der Deutschen Gesellschaft f{\"u}r Kardiotechnik}, year = {2021}, language = {de} } @article{KoenigHinricherBackhaus2021, author = {K{\"o}nig, S. and Hinricher, N. and Backhaus, C.}, title = {VR-bility in der Medizintechnik - Medizinprodukte mittels Virtual Reality gebrauchstauglich gestalten}, series = {Arbeitsmed. Sozialmed. Umweltmed}, volume = {46}, journal = {Arbeitsmed. Sozialmed. Umweltmed}, issn = {0944-6052}, pages = {603 -- 605}, year = {2021}, language = {de} } @article{WermersSchliemannRaschkeetal.2021, author = {Wermers, Jens and Schliemann, Benedikt and Raschke, Michael J. and Dyrna, Felix and Heilmann, Lukas F. and Michel, Philipp A. and Katthagen, J. Christoph}, title = {The Glenolabral Articular Disruption Lesion Is a Biomechanical Risk Factor for Recurrent Shoulder Instability}, series = {Arthroscopy, Sports Medicine, and Rehabilitation}, volume = {3}, journal = {Arthroscopy, Sports Medicine, and Rehabilitation}, number = {6}, issn = {2666-061X}, doi = {10.1016/j.asmr.2021.08.007}, pages = {e1803 -- e1810}, year = {2021}, language = {en} } @article{WermersRaschkeWilkenetal.2021, author = {Wermers, Jens and Raschke, Michael J. and Wilken, Marcel and Riegel, Arne and Katthagen, J. Christoph}, title = {The Anatomy of Glenoid Concavity-Bony and Osteochondral Assessment of a Stability-Related Parameter}, series = {Journal of Clinical Medicine}, volume = {10}, journal = {Journal of Clinical Medicine}, number = {19}, issn = {2077-0383}, doi = {10.3390/jcm10194316}, pages = {4316}, year = {2021}, language = {en} } @article{KatthagenMichelRaschkeetal.2021, author = {Katthagen, J. Christoph and Michel, Philipp and Raschke, Michael J. and Sußiek, Julia and Frank, Andre and Wermers, Jens and Dyrna, Felix and Schliemann, Benedikt}, title = {The forgotten fragment: additional lesser tuberosity fixation of 4-part proximal humeral fractures-a biomechanical investigation}, series = {Journal of Shoulder and Elbow Surgery}, volume = {30}, journal = {Journal of Shoulder and Elbow Surgery}, number = {12}, issn = {1532-6500}, doi = {10.1016/j.jse.2021.04.041}, pages = {2852 -- 2861}, year = {2021}, language = {en} } @article{WermersSchliemannRaschkeetal.2021, author = {Wermers, Jens and Schliemann, Benedikt and Raschke, Michael J. and Michel, Philipp A. and Heilmann, Lukas F. and Dyrna, Felix and Sußiek, Julia and Frank, Andre and Katthagen, J. Christoph}, title = {Glenoid concavity has a higher impact on shoulder stability than the size of a bony defect}, series = {Knee Surgery, Sports Traumatology, Arthroscopy}, journal = {Knee Surgery, Sports Traumatology, Arthroscopy}, doi = {10.1007/s00167-021-06562-3}, year = {2021}, language = {en} } @article{SandtenBoeingHrinciusetal.2021, author = {Sandten, Christian Stefan and B{\"o}ing, Christian and Hrincius, Eike and Anhlan, Darisuren and Kreyenschmidt, Martin and Ludwig, Stephan and Mertins, Hans-Christoph and Mellmann, Alexander and Dworog, Andreas and Hanning, Stephanie and Kuennemann, Thilo and Niehues, Christopher and Schupp, Thomas and Stec, Edyta and Thume, Julius and Triphaus, Daniel and Wilkern, Markus and Uphoff, Holger and Z{\"u}ndorf, Josef and Jacobshagen, Anja}, title = {Decontamination of disposable respirators for reuse in a pandemic employing in-situ-generated peracetic acid}, series = {American Journal of Infection Control}, volume = {00 / 2021}, journal = {American Journal of Infection Control}, doi = {10.1016/j.ajic.2021.09.017}, pages = {1 -- 7}, year = {2021}, language = {en} } @article{Morawetz2021, author = {Morawetz, KLaus}, title = {Consistent solution of Einstein-Cartan equations with torsion outside matter}, doi = {10.1088/1361-6382/ac2417}, year = {2021}, language = {en} } @article{Morawetz2021, author = {Morawetz, Klaus}, title = {Exploring Anomalies by Many-Body Correlations}, series = {PSS B}, journal = {PSS B}, publisher = {Wiley}, doi = {10.25974/fhms-14283}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:836-opus-142836}, year = {2021}, abstract = {The quantum anomaly is written alternatively into a form violating conservation laws or as non-gauge invariant currents seen explicitly on the example of chiral anomaly. By reinterpreting the many-body averaging, the connection to Pauli-Villars regularization is established which gives the anomalous term a new interpretation as arising from quantum fluctuations by many-body correlations at short distances. This is exemplified using an effective many-body quantum potential which realizes quantum Slater sums by classical calculations. It is shown that these quantum potentials avoid the quantum anomaly but approach the same anomalous result by many-body correlations. Consequently, quantum anomalies might be a shortcut way of single-particle field theory to account for many-body effects. This conjecture is also supported since the chiral anomaly can be derived by a completely conserving quantum kinetic theory. A measure for the quality of quantum potentials is suggested to describe these quantum fluctuations in the mean energy. The derived quantum potentials might be used to describe quantum simulations in classical terms.}, language = {en} } @inproceedings{FreudlingGrzesikErhardetal.2021, author = {Freudling, Maximilian and Grzesik, Andreas and Erhard, Markus and Gerhards, Maximilian and Leitz, Sinje and Verpoort, Sven and Wittrock, Ulrich and Hallibert, Pascal}, title = {Space-qualified piezo based deformable mirror for future instruments with active optics}, series = {Proceedings of the International Conference on Space Optics (ICSO)}, volume = {11852}, booktitle = {Proceedings of the International Conference on Space Optics (ICSO)}, organization = {ESA/ESTEC, Noordwijk}, doi = {10.25974/fhms-13741}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:836-opus-137410}, pages = {1185231-11}, year = {2021}, abstract = {This paper presents the results of the technology development project "Enabling Technologies for Piezo-Based Deformable Mirrors in Active Optics Correction Chains" conducted by OHB System AG together with its partner M{\"u}nster University of Applied Sciences (MUAS). The project was funded by ESA within their General Support Technology Programme (GSTP). We address in this paper mainly the definition, flow-down and verification of the requirements for the Deformable Mirror (DM). The requirements were derived from a set of real space mission applications. The deformation of the mirror is performed by piezo-ceramic actuators in an unimorph configuration. The finally developed DM is able produce Zernike modes with a stroke of several tens of µm over a clear optical aperture of 50 mm in diameter. It underwent successfully a full environmental qualification campaign including thermal cycling, shock- and vibration testing, as well as exposure to proton and γ-ray radiation. Thermal and performance tests were performed in the temperature range from 100 K to 300 K. Furthermore, the DM sustained all vibration (random 17.8 g RMS and sinus) and shock (300 g) testing. Thereby all criticalities which were identified a previous study have been overcome successfully. A Technology Readiness Level (TRL) of 5 is reached, as the component has been validated in relevant environment. Based on the high level of maturity, this deformable mirror is now ready for the incorporation in future flight instruments. The achieved TRL of 5 is sufficient for the status of a PDR at payload level and gives thus a very good basis for all kinds of potential B2, C/D payload developments.}, language = {en} } @inproceedings{LeitzGerhardsVerpoortetal.2021, author = {Leitz, Sinje and Gerhards, Maximilian and Verpoort, Sven and Wittrock, Ulrich and Freudling, Maximilian and Grzesik, Andreas and Erhard, Markus and Hallibert, Pascal}, title = {Vibration and shock testing of a 50 mm aperture unimorph deformable mirror}, series = {Proceedings of the International Conference on Space Optics (ICSO)}, volume = {11852}, booktitle = {Proceedings of the International Conference on Space Optics (ICSO)}, organization = {ESA/ESTEC, Noordwijk}, doi = {10.25974/fhms-13740}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:836-opus-137401}, pages = {118524N}, year = {2021}, abstract = {We present our latest results on a refined unimorph deformable mirror which was developed in the frame of the ESA GSTP activity "Enabling Technologies for Piezo-Based Deformable Mirrors in Active Optics Correction Chains". The identified baseline concept with the soft piezoceramic material PIC151 successfully sustained all vibration requirements (17.8 gRMS random and 20 g sine) and shock testing (300 g SRS). We cover the mirror design development which reduces the stress in the brittle piezo-ceramic by 90 \% compared to the design from a former GSTP activity. We briefly address the optical characterization of the deformable mirror, namely the achieved Zernike amplitudes as well as the unpowered surface deformation (1.7 µm) and active flattening (12.3 nmRMS). The mirror produces low-order Zernike modes with a stroke of several tens of micrometer over a correction aperture of 50 mm, which makes the mirror a versatile tool for space telescopes.}, language = {en} } @inproceedings{WangGurevichOstendorf2021, author = {Wang, Hao and Gurevich, Evgeny L and Ostendorf, Andreas}, title = {Application of nanoindentation technique to test surface hardness and residual stress of NiTi alloy after femtosecond laser shock peening}, series = {High-Power Laser Materials Processing: Applications, Diagnostics, and Systems X / SPIE.Digital.Library}, booktitle = {High-Power Laser Materials Processing: Applications, Diagnostics, and Systems X / SPIE.Digital.Library}, publisher = {International Society for Optics and Photonics}, address = {USA}, doi = {10.1117/12.2593092}, pages = {116790J-0 -- 116790J-5}, year = {2021}, abstract = {Laser shock peening is a new and important surface treatment technique that can enhance the mechanical properties of metal materials. Normally, the nanosecond laser with pulse-width between 5 ns and 20 ns is used to induce a high-pressure shock wave that can generate plastic deformation in the top layer of metals. The femtosecond laser shock peening in the air has been studied recently, which can induce higher pressure shock wave than that of traditional nanosecond laser shock peening in a very short time. The NiTi alloy is processed by femtosecond laser shock peening, then a nanoindentation device is used to measure its surface hardness and residual stress. The hardness results of NiTi alloy before and after treatment show that the femtosecond laser shock peening can increase the hardness of NiTi alloy, which also shows that the femtosecond laser can be used to perform laser shock peening on NiTi alloy without coating.}, language = {en} } @article{PuesLaubeFischeretal.2021, author = {Pues, Patrick and Laube, Michael and Fischer, Stefan and Schr{\"o}der, Franziska and Schwung, Sebastian and Rytz, Daniel and Fiehler, Torben and Wittrock, Ulrich and J{\"u}stel, Thomas}, title = {Luminescence and up-conversion of single crystalline Lu3Al5O12:Pr3+}, series = {Journal of Luminescence}, volume = {234}, journal = {Journal of Luminescence}, doi = {10.1016/j.jlumin.2021.117987}, pages = {117987 -- 117995}, year = {2021}, abstract = {This work deals with the spectroscopic properties of praseodymium doped single crystalline lutetium aluminum garnet (LuAG:Pr3+). A special focus was set on temperature- and time-dependent spectroscopy. Beyond the well-known down-conversion luminescence of LuAG:Pr3+, also UV-A/B up-conversion luminescence under excitation with a 488 nm laser was thoroughly investigated. Furthermore, the results of the spectroscopic investigations on the single crystalline material were supplemented and compared with measurements on a microscale powder sample. In addition, to the spectroscopic investigations, mechanistic considerations are presented to obtain a closer look at the up-conversion process in LuAG:Pr3+. We promote the thesis of a temperature-dependent energy transfer up-conversion mechanism.}, language = {en} } @article{TrinschekVorholtWittrock2021, author = {Trinschek, Sarah and Vorholt, Christian and Wittrock, Ulrich}, title = {Nonlinear dynamics in intra-cavity pumped thin-disk lasers}, series = {Optics Express}, volume = {29}, journal = {Optics Express}, number = {4}, doi = {https://doi.org/10.1364/OE.417154}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:836-opus-132355}, pages = {5755 -- 5773}, year = {2021}, abstract = {Cross-saturation of the gain media in intra-cavity pumped lasers leads to complex dynamics of the laser power. We present experimental results and a detailed theoretical analysis of this nonlinear dynamics for an intra-cavity pumped Yb:YAG thin-disk laser in the framework of a rate-equation model. The gain medium of this laser is residing in the resonator of a conventional, diode-pumped Yb:YAG thin-disk laser. Continuous-wave operation, periodic pulse trains, and chaotic fluctuations of the optical power of both lasers were observed. The dynamics is not driven by external perturbations but arises naturally in this laser system. Further examination revealed that these modes of operation can be controlled by the resonator length of the diode-pumped laser but that the system can also show hysteresis and multi-stability.}, language = {en} } @article{DobbelsteinGeorgeGurevichetal.2021, author = {Dobbelstein, Henrik and George, Easo P and Gurevich, Evgeny L and Kostka, Aleksander and Ostendorf, Andreas and Laplanche, Guillaume}, title = {Laser metal deposition of refractory high-entropy alloys for high-throughput synthesis and structure-property characterization}, series = {International Journal of Extreme Manufacturing}, volume = {3}, journal = {International Journal of Extreme Manufacturing}, number = {1}, publisher = {IOP Publishing}, pages = {015201 -- 015201}, year = {2021}, abstract = {Progress in materials development is often paced by the time required to produce and evaluate a large number of alloys with different chemical compositions. This applies especially to refractory high-entropy alloys (RHEAs), which are difficult to synthesize and process by conventional methods. To evaluate a possible way to accelerate the process, high-throughput laser metal deposition was used in this work to prepare a quinary RHEA, TiZrNbHfTa, as well as its quaternary and ternary subsystems by in-situ alloying of elemental powders. Compositionally graded variants of the quinary RHEA were also analyzed. Our results show that the influence of various parameters such as powder shape and purity, alloy composition, and especially the solidification range, on the processability, microstructure, porosity, and mechanical properties can be investigated rapidly. The strength of these alloys was mainly affected by the oxygen and nitrogen contents of the starting powders, while substitutional solid solution strengthening played a minor role.}, language = {en} } @article{KasischkeHartmannNiermannetal.2021, author = {Kasischke, Maren and Hartmann, Simon and Niermann, Kevin and Kostyrin, Denis and Thiele, Uwe and Gurevich, Evgeny L}, title = {Pattern Formation in Slot-Die Coating}, series = {arXiv.org}, volume = {2021}, journal = {arXiv.org}, pages = {1 -- 24}, year = {2021}, abstract = {We experimentally study the occurrence of pattern formation during the slot-die coating of low-viscosity nearly Newtonian liquids onto Polyethylenterephthalat (PET)-substrates. In particular, it is demonstrated that with increase of the coating speed a homogeneous coating becomes unstable with respect to periodic stripe patterns. Thereby, depending on the liquid viscosity, the stripes can be oriented parallel or perpendicular with respect to the coating direction. Mixed states do also occur. The spatial period of perpendicular [parallel] stripes increases [decrease] with the coating speed. The dependence of the effect on various control parameters of slot-die coating is investigated. Finally, a simple theoretical model based on the hydrodynamics of thin films of partially wetting liquids is analysed. Comparing the results to the experiments, conclusions are drawn regarding the acting instability and pattern formation mechanisms.}, language = {en} } @article{WangNettGurevichetal.2021, author = {Wang, Hao and Nett, Ralf and Gurevich, Evgeny L and Ostendorf, Andreas}, title = {The Effect of Laser Nitriding on Surface Characteristics and Wear Resistance of NiTi Alloy with Low Power Fiber Laser}, series = {Applied Sciences}, volume = {11}, journal = {Applied Sciences}, number = {2}, doi = {10.3390/app11020515}, pages = {515}, year = {2021}, abstract = {The laser nitriding was performed in nitrogen gas at room temperature (20 °C) and low temperature (-190 °C) by a low power fiber laser to modify the wear and abrasion resistance of NiTi alloy. The surface roughness and element composition were analyzed by roughness device and energy-dispersive X-ray spectroscopy respectively. The results of roughness show that laser treatment can change the surface roughness due to the laser remelting. The effect of laser nitriding on the microhardness, friction coefficient, and worn scars of NiTi alloy was also studied, which shows that the microhardness of the NiTi alloy increases after laser nitriding. The optical microscope and scanning electron microscope were used to characterize the surface of NiTi alloy after wear testing to observe the microstructure of worn scars. The results show that the laser nitriding with different parameters can induce a nitride layer with different thicknesses and the higher energy deposition is the key factor for the formation of the nitride layer, which can decrease the friction coefficient and reduce wear loss during the application of NiTi alloy. The improvement of wear resistance can be attributed to the hard nitriding layer.}, language = {en} }