Precipitation behavior and mechanical properties of 7A62 aluminum alloy after thermal-magnetic aging
The effects of thermal-magnetic aging on precipitation behavior and mechanical properties of 7A62 aluminum alloy were studied by hardness test,TEM,XRD and tensile properties tests.The results show that under the effect of the thermal magnetic coupling aging,the dislocation mobility in 7A62 aluminum alloy is enhanced and the movement rate of solute atoms is accelerated,which promote the nucleation and growth of precipitates.The peak aging time is greatly shortened,which is only 1/3 of the peak aging time without magnetic addition(i.e.the peak aging time is shortened from 24 h to 8 h).The magnetic field induces the dislocation depinning and promotes the PFZ of grain boundary broadening,and the elongation of 7A62 aluminum alloy after thermal-magnetic peak aging increases by 15.6%than that after conventional peak aging.Therefore,the thermal magnetic coupling can accelerate the aging precipitation process of aluminum alloy,improve its mechanical properties,and significantly improve the production efficiency of aluminum alloy.
NETL
NSTL
万方数据
维普
