王翠萍,黄路生,张晏清,张锦彬,蒋恒星,杨水源,刘兴军.Ge元素的添加对Co-V-Si高温形状记忆合金的组织和热稳定性能的影响[J].稀有金属材料与工程,2020,49(8):2607~2614.[wangcuiping,huanglusheng,zhangyanqing,zhangjinbin,jianghengxing,yangshuiyuan,liuxingjun.Effects of Ge addition on the microstructure and thermal stability of Co-V-Si high-temperature shape memory alloys[J].Rare Metal Materials and Engineering,2020,49(8):2607~2614.]
Ge元素的添加对Co-V-Si高温形状记忆合金的组织和热稳定性能的影响
投稿时间:2019-04-29  修订日期:2019-07-03
中文关键词:  Co-V-Si-Ge  马氏体转变  热稳定性  高温形状记忆合金
基金项目:国家自然科学基金项目(面上项目,重点项目,重大项目)(No. 51571168),国家科技攻关计划(No. 2017YFB0702901)
中文摘要:
      本文对Co64V16Si20形状记忆合金中的硅元素用锗元素取代进行了研究。系统研究了Co64V16Si20-xGex (x = 2,4,6,8, at. %)系列合金在热循环过程中的组织、马氏体转变、热循环稳定性和微观结构演化。当x = 2时,合金为具有D022结构的单相马氏体组织。随着Ge含量增加到4 at. %和6 at. %,观察到(αCo)相和D022马氏体相的两相组织。当Ge含量达到8 at. %时,合金呈现(αCo)相 + D022马氏体相+ R相的三相组织。结果表明,与Co64V16Si20基体合金相比,加入锗元素进行合金化可使可逆马氏体转变温度提高近50℃。虽然在热循环过程中伴随着(αCo)相或R相的析出,但是可逆马氏体相变峰仍然出现在十次热循环中。结果表明,锗元素的添加可以改善Co-V-Si高温形状记忆合金的热循环稳定性。
Effects of Ge addition on the microstructure and thermal stability of Co-V-Si high-temperature shape memory alloys
英文关键词:Co-V-Si-Ge  martensitic transformation  thermal stability  high-temperature shape memory alloys
英文摘要:
      A study of the Ge substitution for Si in the Co64V16Si20 shape memory alloy was performed in this work. The microstructure, martensitic transformation, thermal cycle stability, microstructural evolution during thermal cycling of the Co64V16Si20-xGex (x = 2, 4, 6, 8, at. %) alloys were studied. When x = 2, the alloy is single D022 martensite. With increasing Ge content to 4 and 6 at. %, two-phase microstructure of (αCo) + D022 martensite was observed. When Ge content is up to 8 at. %, three-phase microstructure of (αCo) + D022 martensite + R phase was observed. The results show that the reversible martensitic transformation temperatures increased by nearly 50°C through adding Ge comparing with that of the Co64V16Si20 matrix alloy. Although the (αCo) or R phases precipitated during thermal cycling process, the reversible martensitic transformation peaks were observed during ten times thermal cycles. It reveals that the Ge addition can improve thermal cycling stability of Co-V-Si high-temperature shape memory alloy.
作者单位E-mail
王翠萍 材料学院及福建省材料基因工程重点实验室 cpwang@xmu.edu.cn 
黄路生 材料学院及福建省材料基因工程重点实验室 20720151150858@stu.xmu.edu.cn 
张晏清 材料学院及福建省材料基因工程重点实验室 zhangyanqing@stu.xmu.edu.cn 
张锦彬 材料学院及福建省材料基因工程重点实验室 jbzhang@xmu.edu.cn 
蒋恒星 材料学院及福建省材料基因工程重点实验室 jianghengxing@gmail.com 
杨水源 材料学院及福建省材料基因工程重点实验室 yangshuiyuan@xmu.edu.cn 
刘兴军 厦门大学 材料学院 lxj@xmu.edu.cn 
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