Microstructure and Mechanical Properties of a 6061 Aluminum Alloy Part Prepared by Casting-Forging Integrated Forming Technology

Abstract:

The effect of applied forging pressure on microstructure and mechanical properties of 6061 aluminum alloy was examined. The results showed that the ultimate tensile strength, elongation and hardness of the alloy after heat-treated treatment increase with the applied forging pressure, and the corresponding highest values, 365MPa, 11.52% and 146.53HV, were obtained at the applied forging pressure of 120MPa. Compared to casting condition without forging pressure, the ultimate tensile strength, elongation and hardness can be increased by 22.8%, 98.2% and 48.7%, respectively. The defects such as the shrinkage pores and cracks were absent in the microstructure due to the applied forging pressure. The SEM observation indicated that the fracture mode of 6061 aluminum alloy is more ductile at higher applied forging pressure.

• Periodical: Materials Science Forum (Volume 788)
• Pages: 215-222
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.788.215
• Online since: April 2014
• Authors: Yong Peng, Shun Cheng Wang, Hai Tao Zhou, Kaihong Zheng, He Xing Chen
• Keywords: AA6061 Aluminum Alloy, Casting-Forging Integrated Forming Technology, Forging, Forging Pressure

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