Cu Zn Al Mn Ni记忆合金马氏体内弹性应变能的研究

Study of Elastic Strain Energy in CnZnAlMnNi Shape Memory Alloys

用差示扫描量热分析技术研究了三种不同Mn含量的Cu Zn Al Mn Ni记忆合金中马氏体正逆转变的全过程。发现马氏体在共格切变时所产生的弹性应变能之和,约等于逆、正转变的热效应之差。同时,结果还表明,Mn含量不同,单位质量的马氏体中所产生的弹性应变能亦不相同,且弹性应变能的变化与Mn含量的变化并非是简单的线性关系。

The whole process of positive and adverse martensite transformation has been studied in three CuZnAlMnNi shape memory alloys with different Mn cotent by using the technology of differential scanning calorimetry. It is found that the elastic strain energy produced in coherent shear strain is approximately equal to the difference of calorific effect between adverse and positive martensite transformation. This indicates that the elastic strain energy produced in martensite of unit mass is not the same as the variation of Mn cotent, and it is not the simple linear relation between them.