Influence of Silver Addition on Structure, Martensite Transformations and Mechanical Properties of TiNi-Ag Alloy Wires for Biomedical Application

被引：19

作者：

Baigonakova, Gulsharat ^{[1
]}

Marchenko, Ekaterina ^{[1
]}

Chekalkin, Timofey ^{[1
,2
]}

Kang, Ji-hoon ^{[2
]}

Weiss, Sabine ^{[3
]}

Obrosov, Aleksei ^{[3
]}

机构：

[1] Tomsk State Univ, Lab Med Alloys & Shape Memory Implants, Tomsk 634045, Russia

[2] TiNiKo Co, R&D Ctr, Ochang 28119, South Korea

[3] Brandenburg Tech Univ Cottbus, Dept Phys Met & Mat Technol, D-03044 Cottbus, Germany

来源：

MATERIALS | 2020年 / 13卷 / 21期

关键词：

shape memory alloy; silver; doping; mechanical properties; nanostructured material; wire; X AG; MEMORY; MICROSTRUCTURE; BEHAVIOR; SN;

D O I：

10.3390/ma13214721

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：

The microstructural and functional behavior of TiNi-based wires with a silver content of 0-1.5 at.% was evaluated. The concentration range for Ag doping determined for the TiNi wires with potential for the medical industry was 0-0.2 at.%. Microstructure analysis of TiNi wires with different silver contents at room temperature indicated a multiphase structural state. Various internal structures with tangled grain boundaries were formed by intense plastic deformation. The nanocrystalline structure and phase state of wire with the minimum silver content (0.1 at.% Ag) provide full shape recovery, the greatest reversible strain, and optimal strength and ductility. TiNi ingots with a high Ag content (0.5-1.5 at.%) cracked under minimum load due to excess silver that crystallized along the grain boundaries and broke cohesion bonds between the TiNi grains.

引用

页码：1 / 11

页数：11

共 39 条

[1] Designing NiTiAg Shape Memory Alloys by Vacuum Arc Remelting: First Practical Insights on Melting and Casting [J].