Microstructure, martensitic transformation and mechanical properties of Ni-Mn-Sn alloys by substituting Fe for Ni

被引：16

作者：

Tan, Chang-long ^{[1
]}

Feng, Zhi-cheng ^{[1
]}

Zhang, Kun ^{[2
]}

Wu, Ming-yang ^{[3
]}

Tian, Xiao-hua ^{[1
]}

Guo, Er-jun ^{[2
]}

机构：

[1] Harbin Univ Sci & Technol, Coll Appl Sci, Harbin 150080, Heilongjiang, Peoples R China

[2] Harbin Univ Sci & Technol, Sch Mat Sci & Engn, Harbin 150080, Heilongjiang, Peoples R China

[3] Harbin Univ Sci & Tec hnol, Key Lab Natl & Local United Engn High Efficiency, Harbin 150080, Heilongjiang, Peoples R China

来源：

TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA | 2017年 / 27卷 / 10期

基金：

中国国家自然科学基金;

关键词：

Ni-Mn-Sn alloys; martensitic transformation; mechanical properties; ferromagnetic shape memory alloys; SHAPE; TRANSITION; BEHAVIOR;

D O I：

10.1016/S1003-6326(17)60249-8

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

The effects of partial substitution of Fe element for Ni element on the structure, martensitic transformation and mechanical properties of Ni50-xFexMn38Sn12 (x=0 and 3%, molar fraction) ferromagnetic shape memory alloys were investigated. Experimental results indicate that by substitution of Fe for Ni, the microstructure and crystal structure of the alloys change at room temperature. Compared with Ni50Mn38Sn12 alloy, the martensitic transformation starting temperature of Ni47Fe3Mn38Sn12 alloy is decreased by 32.5 K. It is also found that martensitic transformation occurs over a broad temperature window from 288.9 to 352.2 K. It is found that the mechanical properties of Ni-Mn-Sn alloy can be significantly improved by Fe addition. The Ni47Fe3Mn38Sn12 alloy achieves a maximum compressive strength of 855 MPa with a fracture strain of 11%. Moreover, the mechanism of the mechanical property improvement is clarified. Fe doping changes the fracture type from intergranular fracture of Ni50Mn38Sn12 alloy to transgranular cleavage fracture of Ni47Fe3Mn38Sn12 alloys.

引用

页码：2234 / 2238

页数：5

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