摘要
为了提高CuZnAl合金应用过程中的稳定性和使用寿命,研究Cu-26.87%(wt)Zn-3.85%(wt)Al合金在模拟使用条件下,预变形量和反复的变形加热过程(热与应变循环)对其形状记忆性能的影响。实验结果表明,合金的形状回复率η随着预变形量ε的增加几乎线性下降,ε高达17.7%时,η仅为35%。因此实际应用时,应尽量降低预变形量ε,以便获得较好的形状回复。热与应变循环过程中,刚开始合金的形状回复率η下降较快,随后逐渐趋于稳定,因此将合金预先进行热与应变循环10次左右,可提高其实际应用时的稳定性。
In order to improve the stability and useful life of CuZnAl shape memory alloys (SMA), the influence of pre-strain and thermal-strain cycle on the shape memory effect (SME) of Cu-26.87%(wt)Zn-3.85%(wt)Al were studied. The results showed that with the increase of pre-strain, the SME of specimens decreases linearly. The alloy's η is only 35% when e is 17.7%. In the process of thermal-strain cycles, the SME of specimens decreases quickly at first and decreases slowly later and then becomes stable. The alloy can be cycled 10 times to improve its stability.
出处
《四川大学学报(工程科学版)》
EI
CAS
CSCD
北大核心
2005年第3期73-76,共4页
Journal of Sichuan University (Engineering Science Edition)
基金
高等学校博士学科点专项科研基金(20030610093)