Effects of extrusion and heat treatment on the mechanical properties and biocorrosion behaviors of a Mg-Nd-Zn-Zr alloy

被引：198

作者：

Zhang, Xiaobo ^{[1
]}

Yuan, Guangyin ^{[1
]}

Mao, Lin ^{[1
]}

Niu, Jialin ^{[1
]}

Fu, Penghuai ^{[1
]}

Ding, Wenjiang ^{[1
]}

机构：

[1] Shanghai Jiao Tong Univ, Sch Mat Sci & Engn, Natl Engn Res Ctr Light Alloy Net Forming, Shanghai 200240, Peoples R China

来源：

JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS | 2012年 / 7卷

基金：

中国博士后科学基金; 高等学校博士学科点专项科研基金;

关键词：

Magnesium alloys; Mechanical properties; Heat treatment; Biocorrosion behaviors; Biomedical applications; IN-VIVO CORROSION; MAGNESIUM ALLOY; SURFACE; STENTS; VITRO; AZ31;

D O I：

10.1016/j.jmbbm.2011.05.026

中图分类号：

R318 [生物医学工程];

学科分类号：

0831 ;

摘要：

Mechanical properties at room temperature and biocorrosion behaviors in simulated body fluid (SBF) at 37 degrees C of a new type of patented Mg-3Nd-0.2Zn-0.4Zr (hereafter, denoted as JDBM) alloy prepared at different extrusion temperatures, as well as heat treatment, were studied. The mechanical properties of this magnesium alloy at room temperature were improved significantly after extrusion and heat treatment compared to an as-cast alloy. The results of mechanical properties show that the yield strength (YS) decreases with increasing extrusion temperature. The tensile elongation decreases a little while the ultimate tensile strength (UTS) has no obvious difference. The yield strength and ultimate tensile strength were improved clearly after heat treatment at 200 degrees C for 10 h compared with that at the extrusion state, which can be mainly contributed to the precipitation strengthening. The biocorrosion behaviors of the JDBM alloy were studied using immersion tests and electrochemical tests. The results reveal that the extruded JDBM alloy and the aging treatment on the extruded alloy show much better biocorrosion resistance than that at solid solution state (T4 treatment), and the JDBM exhibited favorable uniform corrosion mode in SBF. (C) 2011 Elsevier Ltd. All rights reserved.

引用

页码：77 / 86

页数：10

共 34 条

[1] Corrosion behaviour of AZ31 magnesium alloy with different grain sizes in simulated biological fluids [J].