Austenite-martensite phase transformation of biomedical Nitinol by ball burnishing

被引：43

作者：

Fu, C. H. ^{[1
]}

Sealy, M. P. ^{[1
]}

Guo, Y. B. ^{[1
]}

Wei, X. T. ^{[2
]}

机构：

[1] Univ Alabama, Dept Mech Engn, Tuscaloosa, AL 35487 USA

[2] Shandong Univ Technol, Sch Mech Engn, Zibo 255049, Peoples R China

来源：

JOURNAL OF MATERIALS PROCESSING TECHNOLOGY | 2014年 / 214卷 / 12期

基金：

美国国家科学基金会;

关键词：

Burnishing; Nitinol; Phase transformation; Surface integrity; Medical device; FATIGUE PERFORMANCE; SURFACE INTEGRITY; PLASTICITY; PARAMETERS; ALLOY;

D O I：

10.1016/j.jmatprotec.2014.07.019

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Nitinol has received considerable attention for biomedical and aerospace applications due to its shape memory and superelastic properties. Shape memory and superelasticity are induced in Nitinol by transforming austenite into martensite. Austenite can transform to martensite by applying stress or heat. One promising method to initiate a stress induced phase transformation is ball burnishing. In this study, phase transformation of Nitinol (Ni50.8Ti49.2) (at.%) by ball burnishing at various forces was investigated. Burnishing tracks were characterized and microstructures in the subsurface were investigated. Also, a corresponding burnishing simulation was performed to gain insight into the phase transformation mechanism of Nitinol by burnishing. (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：3122 / 3130

页数：9

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