Abstract

Cu–14 wt% Al–4 wt% Ni alloy demonstrating the shape memory effect has been subjected to plastic deformation by means of uniaxial compression (upset). The process has been controlled by measuring the strain rate, applied stress, and compression ratio of standard specimens under isothermal conditions in the interval 400–600°C. Structural modifications in the alloy after mechanical tests have been studied by optical, scanning, and transmission microscopy methods and using X-ray phase analysis. It has been found that grains in the alloy became much finer (from 1 mm to 100 μm across) and its strength and ductility improved owing to dynamic recrystallization.

中文翻译：

---

等温Up变在Cu-Al-Niβ合金的巨塑性变形中的应用

摘要

证明形状记忆效应的Cu–14 wt％Al–4 wt％Ni合金已经通过单轴压缩（up锻）进行了塑性变形。通过在400–600°C的等温条件下测量标准样品的应变率，施加的应力和压缩比来控制该过程。通过光学，扫描和透射显微镜方法并使用X射线相分析，研究了机械测试后合金的结构变化。已经发现，由于动态再结晶，合金中的晶粒变得更细（从1毫米到100微米不等），并且其强度和延展性得到改善。