The effects of laser shock peening on the mechanical properties and biomedical behavior of AZ31B magnesium alloy

SURFACE & COATINGS TECHNOLOGY

卷:339

Article

Zhang, Ruixia¹  Zhou, Xianfeng^1,2,7  Gao, Hongyu³  Mankoci, Steven²  Liu, Yang⁴  Sang, Xiahan⁵  Qin, Haifeng⁶  Hou, Xiaoning¹  Ren, Zhencheng¹  Doll, Gary L.⁶  Martini, Ashlie³  Dong, Yalin¹  Sahai, Nita^2,8,9  Ye, Chang¹ 

[1] Univ Akron, Dept Mech Engn, Akron, OH 44325 USA

[2] Univ Akron, Dept Polymer Sci, Akron, OH 44325 USA

[3] Univ Calif Merced, Dept Mech Engn, Merced, CA 95343 USA

[4] North Carolina State Univ, Dept Mat Sci & Engn, Box 7907, Raleigh, NC 27695 USA

[5] Oak Ridge Natl Lab, Ctr Nanophase Mat Sci, Oak Ridge, TN 37831 USA

[6] Univ Akron, Timken Engineered Surfaces Labs, Akron, OH 44325 USA

[7] Qingdao Univ Sci & Engn, Sch Polymer Sci & Engn, Qingdao 266042, Peoples R China

[8] Univ Akron, Dept Geosci, Akron, OH 44325 USA

[9] Univ Akron, Integrated Biosci Program, Akron, OH 44325 USA

关键词: Laser shock peening (ISP);    Magnesium alloys;    Wear resistance;    Fatigue performance;    Biodegradation;    Biocompatibility;   

DOI  :  10.1016/j.surfcoat.2018.02.009

来源: Elsevier

【 摘 要 】

Mg alloys offer potential advantages over conventional biomedical implant materials because of their biodegradability and biocompatibility, but could be limited by their poor mechanical properties. In this study, laser shock peening (LSP), a surface processing technique, was applied to improve the mechanical properties of the AZ31B magnesium (Mg) alloy. It was demonstrated that LSP increased the hardness and yield strength of the Mg alloy. Due to the hardening, LSP significantly improved the wear resistance and fatigue performance of the Mg alloy. In addition, immersion tests carried out in cell culture medium revealed that LSP did not significantly increase Mg2+ release and weight loss. Furthermore, an in vitro cell culture study showed that the LSP-treated samples have cell-compatibility comparable to untreated samples. Thus, the LSP technique could, with further study, advance the clinical utility of Mg alloys in the orthopedic field.

【 授权许可】

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