材料工程2017，Vol.45Issue(4)：15-20,6.DOI:10.11868/j.issn.1001-4381.2015.000401
高纯铝多向锻造大塑性变形过程的数值模拟及实验研究
Numerical Simulation and Experimental Investigation on Multi-direction Forging Behaviors of High Purity Aluminum
摘要
Abstract
The effect of forging pass on the deformation structure of high purity aluminum at room temperature during multi-direction forging process was investigated by experiment.The multi-direction forging process was analyzed by using software of DEFORM-3D.The results show that an X-shape fine grain zone (in the center of the sample) and four coarse grain zones (near the end surface of the sample) are initially formed on the cross section of the sample as forging passes increase to 3.With a further increasing the passes to 9, this X-shape zone tends to spread the whole sample.However, the grain difference between the coarse grain zone and fine grain zone still exists on the sample forged by 9 passes.Limitation in the structural refinement is observed in the center of the sample with the increment of equivalent strain.The grains size in the center is refined to a certain size (about 70μm) as equivalent strain reaches 2.5, and no further grain refinement in the center with increasing the equivalent strain to 6.0.However, the grains size in the area near the surface is continuously refined with the increasing the equivalent strain to 4.0.This indicates that the local deformation state and the equivalent strain are two important factors that affect the grain size.关键词
多向锻造/高纯铝/组织均匀性/数值模拟Key words
multi-directional forging/high purity aluminum/structure uniformity/numerical simulation分类
矿业与冶金引用本文复制引用
朱庆丰,张扬,朱成,班春燕,崔建忠..高纯铝多向锻造大塑性变形过程的数值模拟及实验研究[J].材料工程,2017,45(4):15-20,6.基金项目
国家自然科学基金资助项目(51204053,51374067) （51204053,51374067）
中央高校基本科研资助项目(N130409005,N130709001,N130209001) （N130409005,N130709001,N130209001）
