摘要
2A12 Al alloy was suffered from equal-channel angular pressing（ECAP） in this experiment. The influence of ECAP pass number on ultimate strength（UTS）, hardness and elongation was studied. The results show that during ECAP the number of sample passing through the channels is very important for mechanical properties and microstructure refinement. ECAP not only increases their plasticity and hardness but also leads to refined grain. But the elongation reduces from 17.5% tol 1.8 % after 1 pass ECAP, then almost tends to be unchanged with the increasing of pass number. The value of ultimate strength of 2A12 Al alloy increases by 135%, hardness by 51%, and ultra fine grains of about 200 nm can be observed after 8 passes.
2A12 Al alloy was suffered from equal-channel angular pressing（ECAP） in this experiment. The influence of ECAP pass number on ultimate strength（UTS）, hardness and elongation was studied. The results show that during ECAP the number of sample passing through the channels is very important for mechanical properties and microstructure refinement. ECAP not only increases their plasticity and hardness but also leads to refined grain. But the elongation reduces from 17.5% tol 1.8 % after 1 pass ECAP, then almost tends to be unchanged with the increasing of pass number. The value of ultimate strength of 2A12 Al alloy increases by 135%, hardness by 51%, and ultra fine grains of about 200 nm can be observed after 8 passes.
基金
the Science and Technological Program Plan of Shandong Province(No.2006GG3203005.2006GG2203006)
the Science and Technological Program Plan of Jinan City(No.200705035)
