Cu－Zn－Al（Mn）形状记忆合金冷拉丝织构研究

STUDY ON TEXTURE OF COLD DRAWN WIRE OF Cu- Zn-AL(Mn)SHAPE MEMORY ALLOYS

用三维取向分布函数（ＯＤＦ）研究冷拉Ｃｕ－Ｚｎ－Ａｌ合金线材的织构。该合金经９５％冷拉变形和适当的热处理可获得相对细的晶粒组织、利于织构分析。研究结果表；冷拉Ｃｕ－Ｚｎ－Ａｌ合金线材的主要变形织构对于α相［１１１］＋［１００］丝织构，对于β相［１１０］丝织构，马氏体相强的丝织构可以根据马氏体的取向变和奥氏体β’相的［１１０］丝织构，利用马氏体晶体学唯象理论进行解释。

The texture of cold drawn wire of Cu-Zn-Al(Mn) shape memory alloy has been studied by using ODF technique. The relatively fine-grained Cu-Zn-Al(Mn)shape memory alloys were obtained by 95% cold drawing in the(α+β)region followed by appropriate heat treatments.The results showed that the deformation texture in the cold drawn wire consists of a strong [111]+[100]double fibre texture in the α-phase and a [110] fibre in the β-phase.The strong fibre texture in the martensitic phase can be understood in terms of the [110]fibre of the β-phase and oriented transformation to martensite applying the crystallographic orientation relationship between both phases.