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首页> 外文期刊>Applied Surface Science >Corrosion behavior of NiTi alloy subjected to femtosecond laser shock peening without protective coating in air environment
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Corrosion behavior of NiTi alloy subjected to femtosecond laser shock peening without protective coating in air environment

机译：飞秒激光冲击强化NiTi合金在空气环境中的腐蚀行为

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摘要

Laser shock peening with femtosecond laser was used to improve the corrosion resistance of biomedical NiTi alloy without protective coating in the air environment. The energy dispersive X-ray analysis (EDX) and X-ray diffraction (XRD) based analysis showed that the laser ablation could produce titanium oxide layer and femtosecond laser shock peening (FsLSP) can generate residual stress in the surface layer of NiTi alloy. The FsLSP improved the corrosion resistance of NiTi in 3.5% NaCl solution and Hank's solution and also prevented the formation of corrosion cracks and pits during corrosion testing. The reasons for the improvement of corrosion behavior may be the generation of residual stress and titanium oxide film during the laser surface treatment.
机译：飞秒激光的激光冲击喷丸技术用于改善生物医学NiTi合金的耐蚀性，而无需在空气环境中添加保护涂层。基于能量色散X射线分析（EDX）和X射线衍射（XRD）的分析表明，激光烧蚀会产生二氧化钛层，飞秒激光冲击喷丸（FsLSP）会在NiTi合金表层产生残余应力。 FsLSP提高了NiTi在3.5％NaCl溶液和Hank's溶液中的耐腐蚀性，并且还防止了腐蚀测试过程中腐蚀裂纹和凹坑的形成。改善腐蚀行为的原因可能是在激光表面处理过程中产生残余应力和氧化钛膜。

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