알루미늄 6061 합금의 열간단조시 변형율속도 및 변형율에 따른 기계적 성질에 관한 연구

A Study on the Mechanical Properties with the Strain rate and Strain for Aluminum 6061 Alloy in Hot Forging

The mechanical properties of Al 6061 excluded bar were deformed in high temperature with the variable deformation conditions and characterized by the tensile test. Three types of different strain rate were experimentally performed by using hydraulic press, crank press and hammer and two types of the nominal strain 0.5 and 0.8 were achieved. To decide optimum forging process, the relationship among the strain rate, strain and mechanical properties was explained by analyzing the microstructures of the forged and heat heated parts. The strength was deeply related with the strain rate due to the dynamic recrystallization (DRX) in hot forging, and the best forging condition was presented in Al 6061 alloy.