Simulated Body Fluid-Assisted Stress Corrosion Cracking of a Rapidly Solidified Magnesium Alloy RS66

被引：0

作者：

Raman, R. K. Singh ^{[1
,2
]}

Choudhary, Lokesh ^{[1
]}

Shechtman, Dan ^{[3
]}

机构：

[1] Monash Univ, Dept Mech & Aerosp Engn, Clayton, Vic 3800, Australia

[2] Monash Univ, Dept Chem & Biol Engn, Clayton, Vic 3800, Australia

[3] Technion Israel Inst Technol, Dept Mat Engn, IL-32000 Haifa, Israel

来源：

MATERIALS | 2024年 / 17卷 / 16期

关键词：

biodegradable implants; magnesium alloy; stress corrosion cracking; rapid solidification; IN-VITRO DEGRADATION; STEEL ORTHOPEDIC IMPLANT; PURE MAGNESIUM; CA ALLOYS; FATIGUE; VIVO; BIODEGRADATION; BIOMATERIALS; EVOLUTION; PROTEINS;

D O I：

10.3390/ma17163967

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

This study investigated the simulated body fluid-assisted stress corrosion cracking (SCC) of an Al-free magnesium alloy (RS66) and a common Al-containing magnesium alloy (AZ91), the former being more suitable for temporary implant applications (however, we used AZ91 for comparison since there are considerable reports on SCC in this alloy). The investigation includes SCC tests under simultaneous conditions of mechanical loading and imposed electrochemical potential that established a combined effect of hydrogen and anodic dissolution as the embrittlement mechanism. Though the RS66 alloy possesses impressive mechanical properties in non-corrosive environments (as a result of its fine grain size), both alloys suffered significant embrittlement when tested in simulated body fluid. The susceptibility of the RS66 alloy to SCC was similar to 25% greater than that of AZ91, which is attributed to the greater resistance of AZ91 to corrosion/localised corrosion because of its Al content.

引用

页数：12