Laser annealing on the surface treatment of thin super elastic NiTi wire

0501904 - FZÚ 2019 RIV GB eng C - Conference Paper (international conference)
Samal, Sneha Manjaree - Heller, Luděk - Brajer, J. - Tyc, Ondřej - Kadeřávek, Lukáš - Šittner, Petr
Laser annealing on the surface treatment of thin super elastic NiTi wire.
IOP Conference Series: Materials Science and Engineering. Vol. 362. Bristol: IOP Publishing Ltd, 2018, s. 1-7, č. článku 012007. IOP Conference Series. ISSN 1757-8981.
[International Conference on Smart Engineering Materials (ICSEM 2018). Bukurešť (RO), 07.03.2018-09.03.2018]
R&D Projects: GA ČR GA16-20264S
Institutional support: RVO:68378271
Keywords : annealing * binary alloys * laser surface treatment
OECD category: Condensed matter physics (including formerly solid state physics, supercond.)

Here the aim of this research is annealing the surface of NiTi wire for shape memory alloy, super-elastic wire by solid state laser beam. The laser surface treatment was carried out on the NiTi wire locally with fast, selective, surface heat treatment that enables precisely tune the localized material properties without any precipitation. Both as drawn (hard) and straight annealing NiTi wire were considered for laser annealing with input power 3 W, with precisely focusing the laser beam height 14.3 % of the Z-axis with a spot size of 1 mm. However, straight annealing wire is more interest due to its low temperature shape setting behavior and used by companies for stent materials. The variable parameter such as speed of the laser scanning and tensile stress on the NiTi wire were optimized to observe the effect of laser response on the sample.
Permanent Link: http://hdl.handle.net/11104/0293885