Ni43Co7Mn41Sn9高温形状记忆合金薄带的结构和相变

陈枫; 苏德喜; 佟运祥; 牛立群; 王海波; 李莉

doi:10.3724/SP.J.1037.2013.00155

金属学报 >

2013 , Vol. 49 >Issue 8: 976 - 980

DOI: https://doi.org/10.3724/SP.J.1037.2013.00155

论文

Ni₄₃Co₇Mn₄₁Sn₉高温形状记忆合金薄带的结构和相变

陈枫 ,
苏德喜 ,
佟运祥 ,
牛立群 ,
王海波 ,
李莉

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1) 哈尔滨工程大学生物医学材料与工程研究中心, 哈尔滨 150001
2) 台州学院物理与电子工程学院, 台州318000

陈枫, 男, 1976年生, 副教授

收稿日期: 2013-04-02

修回日期: 2013-05-17

网络出版日期: 2013-08-11

基金资助

国家自然科学基金项目51101040, 浙江省自然科学基金项目Y4100618和中央高校基本科研业务费专项资金项目

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MICROSTRUCTURE AND PHASE TRANSFORMATION OF Ni₄₃Co₇Mn₄₁Sn₉ HIGH TEMPERATURE SHAPE MEMORY ALLOY RIBBON

CHEN Feng ,
SU Dexi ,
TONG Yunxiang ,
NIU Liqun ,
WANG Haibo ,
LI Li

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1) Center for Biomedical Materials and Engineering, Harbin Engineering University, Harbin 150001
2) College of Physics and Electronic Engineering, Taizhou University, Taizhou 318000

Received date: 2013-04-02

Revised date: 2013-05-17

Online published: 2013-08-11

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摘要

采用单辊快淬法制备了名义成分为Ni₄₃Co₇Mn₄₁Sn₉的高温形状记忆合金薄带,并对其微观组织结构和马氏体相变进行了研究. 结果表明, 薄带发生一步热弹性马氏体相变,经高温热处理后马氏体相变温度达到160℃. 制备态薄带的晶粒为微米级, 大小不一,介于2—18 μm之间, 与块体母合金相比晶粒明显细化, 且大部分晶粒沿垂直薄带表面方向生长.室温下, 薄带(消除内应力后)为正方结构的非调制马氏体, 马氏体变体内部由孪晶亚结构组成.热处理后薄带的相变温度有所下降, 但随着热处理温度的升高基本保持不变.

关键词： Ni-Co-Mn-Sn; 高温形状记忆合金; 薄带; 快速凝固; 马氏体相变

本文引用格式

陈枫 , 苏德喜 , 佟运祥 , 牛立群 , 王海波 , 李莉 . Ni₄₃Co₇Mn₄₁Sn₉高温形状记忆合金薄带的结构和相变[J]. 金属学报, 2013 , 49(8) : 976 -980 . DOI: 10.3724/SP.J.1037.2013.00155

Abstract

NiCoMnSn shape memory alloy (SMA) is expected to be a promising high temperature SMA. However, the brittleness has become a big obstacle for its practical application. It is known that, grain refining is effective in improving the ductility of a specific metallic alloy. The aim of this work is to investigate the effect of melt--spinning on grain refinement and martensitic transformation and provide a guideline for the development of NiCoMnSn SMA. Ni₄₃Co₇Mn₄₁Sn₉ high temperature SMA ribbon was prepared by a single-roll melt-spinning method. The microstructure and martensitic transformation were investigated by means of OM, SEM, TEM, XRD and DSC, respectively. The experimental results showed that, the ribbon had a chemical composition close to the master alloy and exhibited a thermoelastic martensitic transformation at about 160℃. The grains in the as-spun ribbon, ranging from 2 μm to 18 μm,were remarkably refined compared with the master alloy. In the as--prepared ribbon,most of the columnar grains grew along the direction vertical to the ribbon plane.At room temperature, non-modulated martensite (tetragonal structure) consisting of twin substructure is determined in the ribbon after relieving the internal stress. Transformation temperatures were lowered by 30℃ after heat treatment at 400℃ for 1 h and then kept nearly constant with the increase of heat treatment temperatures.

Key words： Ni-Co-Mn-Sn; high temperature shape memory alloy; ribbon; rapid solidification; martensitic transformation

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