Corrosion Behavior of Ti-55Ni-1.2Co High Stiffness Shape Memory Alloys

被引：8

作者：

Huang, Xu ^{[1
]}

Norwich, Dennis W. ^{[1
]}

Ehrlinspiel, Michael ^{[1
]}

机构：

[1] Memry Corp, Bethel, CT 06801 USA

来源：

JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE | 2014年 / 23卷 / 07期

关键词：

brazing; corrosion and wear; intermetallic; joining;

D O I：

10.1007/s11665-014-1014-8

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The corrosion behavior of high stiffness nominal Ti-55Ni-1.2Co (wt.%) shape memory alloys (SMAs) was systematically investigated in the present study including straight wires, wire-formed stents, and laser-cut stents. It was found that the corrosion behavior of Ti-55Ni-1.2Co alloys is comparable with those of binary NiTiNol counterparts, which is attributed to the small alloying amount of cobalt. Additionally, the corrosion resistance of high stiffness Ti-55Ni-1.2Co SMAs is independent of the stent-forming method. To explore the galvanic corrosion susceptibility between Ti-55Ni-1.2Co and binary NiTiNol alloys, a NiTiNol sleeve was laser welded to the Ti-55Ni-1.2Co stent. Interestingly, there is no galvanic corrosion observed in this NiTiCo-NiTiNol component, even after immersion of the component in phosphate-buffered saline solution at 37 A degrees C for three months. This study will shed some light on the industrial applications of high stiffness Ti-55Ni-1.2Co shape memory alloys.

引用

页码：2630 / 2634

页数：5

共 10 条

[1] Evaluation of microstructural effects on corrosion behaviour of AZ91D magnesium alloy [J].