<strong>Y</strong>元素对<strong>Cu-Al-Ni</strong>高温形状记忆合金性能的影响

doi:10.11900/0412.1961.2021.00400

金属学报

2022, Vol. 58

Issue (8): 1065-1071 DOI: 10.11900/0412.1961.2021.00400

研究论文

本期目录 | 过刊浏览

Y元素对Cu-Al-Ni高温形状记忆合金性能的影响

张鑫¹, 崔博², 孙斌³, 赵旭⁴, 张欣¹(

), 刘庆锁¹, 董治中¹(

)

^1.天津理工大学材料科学与工程学院天津 300384
^2.中国工程物理研究院原子核物理与化学研究所绵阳 621900
^3.哈尔滨工程大学材料科学与化学工程学院哈尔滨 150001
^4.北京天宜上佳高新材料股份有限公司北京 102400

Effect of Y Element on the Properties of Cu-Al-Ni High Temperature Shape Memory Alloy

ZHANG Xin¹, CUI Bo², SUN Bin³, ZHAO Xu⁴, ZHANG Xin¹(

), LIU Qingsuo¹, DONG Zhizhong¹(

)

^1.School of Materials Science and Engineering, Tianjin University of Technology, Tianjin 300384, China
^2.Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics, Mianyang 621900, China
^3.College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin 150001, China
^4.Beijing Tianyi Shangjia High-Tech Materials Co. Ltd., Beijing 102400, China

引用本文:

张鑫, 崔博, 孙斌, 赵旭, 张欣, 刘庆锁, 董治中. Y元素对Cu-Al-Ni高温形状记忆合金性能的影响[J]. 金属学报, 2022, 58(8): 1065-1071.
Xin ZHANG, Bo CUI, Bin SUN, Xu ZHAO, Xin ZHANG, Qingsuo LIU, Zhizhong DONG. Effect of Y Element on the Properties of Cu-Al-Ni High Temperature Shape Memory Alloy[J]. Acta Metall Sin, 2022, 58(8): 1065-1071.

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摘要:

利用XRD、OM、SEM、TEM、电子万能力学试验机以及电化学工作站对Cu-13Al-4Ni-xY (x = 0.2、0.5,质量分数,%)高温形状记忆合金进行组织观察和性能测试。研究结果表明,加入Y元素后,Cu-13Al-4Ni-xY合金的室温组织主要为18R马氏体基体,以及具有六方结构的(Cu, Al, Ni)₄Y第二相。随着Y元素含量的提高,Cu-13Al-4Ni-xY合金的力学性能大幅提升。当Y含量为0.5%时,压缩断裂应变与断裂强度从未添加Y时的10.5%和580 MPa分别提升到了19.3%和1185 MPa,且合金的断裂形式由沿晶断裂变为穿晶断裂。电化学实验结果表明,Y元素的添加使合金耐蚀性稍有下降。

关键词 ：铜基形状记忆合金, 显微组织, 力学性能, 形状记忆效应

Abstract：

Cu-Al-Ni alloys are not yet widely used due to issues related to their coarse grains, unacceptable plasticity, and poor thermal stability. Here, the physical and mechanical properties, as well as the corrosion behavior, of Cu-Al-Ni alloys doped with Y element (Cu-13Al-4Ni-xY (x = 0.2, 0.5, mass fraction, %)) were studied. XRD, OM, SEM, TEM, electronic universal testing machine, and electrochemical workstation were used to characterize the microstructures and measure the properties of the Cu-13Al-4Ni-xY alloys. The results showed that at room temperature, the microstructure of Cu-13Al-4Ni-xY alloys was mainly an 18R martensite matrix. The (Cu, Al, Ni)₄Y second phase was characterized to have a hexagonal structure. The mechanical properties of the Cu-13Al-4Ni-xY alloys improved as the Y element content increased. For example, when the Y content was increased from 0% to 0.5%, the compressive fracture strain increased from 10.5% to 19.3% and the fracture strength increased from 580 to 1185 MPa. Additionally, the fracture type of the alloy changed from intergranular to transgranular with the addition of Y. Finally, the results from electrochemical experiments showed that the corrosion behavior of the alloys decreased slightly with the addition of Y.

Key words： Cu-based shape memory alloy microstructure mechanical property shape memory effect

收稿日期: 2021-09-16

ZTFLH:

TV139.2

基金资助:国家自然科学基金项目(52071236);天津市自然科学基金项目(18JCYBJC87000)

作者简介: 张欣, zhangxin3510110@tjut.edu.cn,主要从事记忆合金材料研究董治中, zhizhong.dong@email.tjut.edu.cn,主要从事超临界耐热钢、海洋工程材料及记忆合金材料研究
张鑫,男,1997年生,硕士生

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https://www.ams.org.cn/CN/10.11900/0412.1961.2021.00400 或 https://www.ams.org.cn/CN/Y2022/V58/I8/1065

图1 Cu-13Al-4Ni-xY (x = 0.2、0.5)合金的OM和SEM像

图2 Cu-13Al-4Ni-xY (x = 0.2、0.5)合金的XRD谱

图3 Cu-13Al-4Ni-0.5Y合金的TEM明场像、SAED花样、HRTEM像及第二相区域EDS元素面扫描图

图4 Cu-13Al-4Ni-xY (x = 0.2、0.5)合金的压缩应力-应变曲线及断口形貌

图5 Cu-13Al-4Ni-xY (x = 0.2、0.5)合金分别在8%和10%预应变下的恢复特性曲线

图6 Cu-13Al-4Ni-xY (x = 0、0.2、0.5)合金在3.5%NaCl溶液中的动电位极化曲线

表1 Cu-13Al-4Ni-xY合金在3.5%NaCl溶液中的腐蚀参数

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