利用金相显微镜、透射电镜、扫描电镜观察和力学性能测试等手段研究了Cu-18.4Al-8.7Mn-3.4Zn-0.1Zr(摩尔分数,%)记忆合金(多晶)在不同温度与组织下变形时的力学行为.实验合金在不同温度下变形时延伸率不同,变形温度(Td)在Ms与Af之间时的延伸率小于变形温度(Td)高于Af时的延伸率.对实验合金施加应力时,最初的变形主要来自应力诱发马氏体,继而发生马氏体变体择优合并,二者对合金的变形都有贡献; 变形量更大时,变体界面共格性被破坏,部分马氏体丧失热弹性.少量α相的析出不影响记忆效应,可使延伸率得以提高.
参考文献
| [1] | NEISHI K;Horita Z;Langdon TG .Achieving superelasticity in a Cu-40%Zn alloy through severe plastic deformation[J].Scripta Metallurgica et Materialia,2001,35:965-970. |
| [2] | Cheng Yan;Wang Mingpu .Stabilization of martensite in Cu-Zn-al alloy and its reverse shape memory effect[J].Transactions of Nonferrous Metals Society of China,1998(4):652-656. |
| [3] | Mantal M;Gueniu G;Macqueron J L et al.High temperature transformation in stabilized CuZnAl martensite[J].Scripta Metallurgica et Materialia,1986,20:803-806. |
| [4] | Gao Y.;Lai JK.;Zhu M. .Microstructure characterization and effect of thermal cycling and ageing on vanadium-doped Cu-Al-Ni-Mn high-temperature shape memory alloy[J].Journal of Materials Science,1998(14):3579-3584. |
| [5] | Miyazaki S;Kawai X;Otasuka K .On the origin of intergranular fracture in β phase shape memory alloy[J].Scripta Metallurgica et Materialia,1982,16:431-435. |
| [6] | R. KAINUMA;S. TAKAHASHI;K. ISHIDA .Thermoelastic Martensite and Shape Memory Effect in Ductile Cu-Al-Mn Alloys[J].Metallurgical and Materials Transactions, A. Physical Metallurgy and Materials Science,1996(8):2187-2195. |
| [7] | Zak G;Kneissl A C;Zatulskij G .Shape memory effect in cryogenic Cu-Al-Mn alloy[J].Scripta Metallurgica et Materialia,1996,30(03):363-367. |
| [8] | Fang D N;Lu W;Hwang K C .Pseudoelastic behavior of a CuAlNi single crystal under uniaxial loading[J].Metallurgical and Materials Transactions A:Physical Metallurgy and Materials Science,1999,30:1993-1943. |
| [9] | Horikawa H;Ichinose S;Morii K et al.Orientation dependence of β1→β1 stress-induced martensite transformation in a Cu-Al-Ni alloy[J].Metallurgical and Materials Transactions A:Physical Metallurgy and Materials Science,1988,19:915-923. |
| [10] | 李周,汪明朴,曹玲飞,苏玉长,徐根应.Crystal structure and thermal stability of martensite in Cu-24Al-3Mn alloy[J].中国有色金属学会会刊(英文版),2002(01):6-10. |
| [11] | Tadaki Y;Okazaki H;Nakata Y et al.Atomic configuration studied by ALCHEMI and X-ray diffraction of a stabilized M18R martensite in a β phase Cu-Au-Zn alloy[J].Materials Transactions,1990,31:941-949. |
| [12] | 王风廷;杨大智 .CuZnAl形状记忆合金的熔炼与加工[J].大连理工大学学报,1990,30(01):45-50. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%