Abstract

This work compares conventional unidirectional rolling (UDR) and cross rolling (CR) based on mechanical properties, microstructure, and stored energy. Pure copper is subjected to UDR and CR to true strains of 0.69, 1.39, 2.08, and 2.77, respectively. The UDR samples show high strength and hardness compared to the CR. Investigation of microstructures of formed samples using optical microscopy and EBSD revealed that the grains were elongated along with the rolling directional for UDR and fairly equiaxed grains with reduced anisotropy for CR. The stored energy calculated using calorimetry experiments was correlated with mechanical and microstructure evolution.

摘要

这项工作根据机械性能、微观结构和储能比较了传统的单向轧制 (UDR) 和交叉轧制 (CR)。纯铜经受 UDR 和 CR 的真实应变分别为 0.69、1.39、2.08 和 2.77。与 CR 相比，UDR 样品显示出高强度和硬度。使用光学显微镜和 EBSD 对成形样品的微观结构研究表明，对于 UDR，晶粒随着轧制方向被拉长，对于 CR，晶粒相当等轴，各向异性降低。使用量热法实验计算的存储能量与机械和微观结构演变相关。