Effect of Homogenization Temperature on Microstructure and Properties of 6451 Aluminium Alloy
The microstructure evolution of 6451 aluminium alloy at different homogenization temperature was studied by DSC,OM and SEM.The results show that with the increase of homogenization temperature,the dendrite structure in the as-cast structure of 6451 aluminium alloy disappears,the Q-AlCuMgSi phase redissolves,the Mg2Si phase precipitates first and then redissolves,and the Al(Fe,Mn)Si phase discontinuously transforms from long strip to form a spheroidal phase with shorter length,more rounded shape and smaller size.At 530℃,the grain size increases from 164 μm(as-cast)to 213 μm.When the temperature continues to rise,the grain size does not change significantly.The electrical conductivity increases first and then decreases,and then increases slightly after stabilizing.
NETL
NSTL
万方数据
