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- W2351671879 abstract "The phenomenon of grain boundary precipitation and intragranular precipitate coarsening in an Al-0.5Mg-1.0Si-0.8Cu(wt.%) alloy were investigated by micro-hardness tester,scanning electron microscopy(SEM),transmission electron microscopy(TEM) and energy dispersive X-ray spectroscopy(EDS).The experimental results show that two types of discontinuous grain boundary precipitates exist during artificial aging:(1) Si-rich particles of about 1 μm and(2) Q-phase particles of 10~30 nm.For the samples aged for 0.5 h,very few Si-rich precipitates were observed.After aging for 5 h,the number of Si-rich particles obviously increased.The size of Si-rich particles increases with the aging time until 36 h,and stays unchanged afterwards.The grain boundary Q phase has also the specific orientation with one of the two grains: 〈510〉Al//〈1120〉Q.Although the grain boundary precipitates stop coursing after 36 h of aging,the intragranular precipitates continue growing and eventually form an observable precipitate free zone along the grain boundaries.TEM and EDS analyses indicate that the intragranular precipitates are Si precipitates,possessing platelet,globule or rod morphologies.The rod-like Si precipitates grow along 〈001〉Al,and have a orientation relationship with Al matrix: 〈112〉Si//〈001〉Al,{111}Si//{010}Al." @default.
- W2351671879 created "2016-06-24" @default.
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- W2351671879 date "2012-01-01" @default.
- W2351671879 modified "2023-09-24" @default.
- W2351671879 title "An electron microscopy study of precipitate coarsening in Al-Mg-Si-Cu alloys" @default.
- W2351671879 hasPublicationYear "2012" @default.
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