期刊
SURFACE & COATINGS TECHNOLOGY
卷 324, 期 -, 页码 478-485出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.surfcoat.2017.05.092
关键词
Nickel-titanium; Laser processing; Corrosion; NiTi; Shape memory alloy (SMA); Surface treatments
资金
- Canada Foundation for Innovation (CFI)
- Natural Sciences and Engineering Research Council of Canada (NSERC)
Laser processing of shape memory alloys (SMAs) has great potential to enable the multi-functionality required for complex applications. Achieving this improved functionality often requires laser processing of the SMA's with a high-energy pulse coupled with an observable decrease in the corrosion resistance, however there are discrepancies in the post-processing corrosion performance. The current study conducts a systematic investigation of Ni-44.2 wt% Ti SMA with differing numbers of laser pulses and post-process surface treatments. The localized electrochemical characteristics were investigated by scanning electrochemical microscopy. X-ray photoelectron spectroscopy and Raman spectroscopy was used to determine surface composition and oxide crystallinity, while oxide stability was determined via potentiodynamic cyclic polarization. Results showed that fewer pulses were not significantly detrimental to the corrosion performance. However, increasing the number of pulses had a significant impact on oxide stability in the heat affected zone due to increased crystallinity. The post-process surface treatments restored corrosion performance to pre-processed capabilities; however, further optimization is required to achieve maximum corrosion resistance. (C) 2017 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据