Numerical Simulation and Experimental Investigation on Multi-direction Forging Behaviors of High Purity Aluminum

• Main Authors: ZHU Qing-feng, ZHANG Yang, ZHU Cheng, BAN Chun-yan, CUI Jian-zhong
• Format: Article
• Language: zho
• Published: Journal of Materials Engineering 2017-04-01
• Series: Journal of Materials Engineering
• Subjects: multi-directional forging; high purity aluminum; structure uniformity; numerical simulation
• Online Access: http://jme.biam.ac.cn/CN/Y2017/V45/I4/15
• ISSN: 1001-4381; 1001-4381

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 70<i>μ</i>m) 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.