摘要
利用TEM研究了Zn Al40合金在固溶时效过程中发生的非连续脱溶沉淀.结果表明:Zn Al40合金非连续沉淀既可发生受晶界迁移控制的常规胞状反应,形成片层相间的α Al+η Zn平衡组织,又可在晶内自发形核生长,发生自催化胞状反应,形成α Al基体上分布岛状的η Zn平衡组织.两种胞状组织形成的多少与时效温度有关.
Discontinuous reaction in a ZnAl alloy during solutionaging was studied by TEM. The results show that the discontinuous reaction proceeded not only by a conventional cellular reaction controlled by the migrating of the grain boundary, but also a autocatalytic cellular reaction occurring in the grain. The different microstructurelamellar αAl+ηZn and islandlike ηZn distributed in αAl matrix would be formed by both mechanisms. The aging temperature should be responsible for the occurrence of both mechanisms.
出处
《大连海事大学学报》
CAS
CSCD
北大核心
2003年第3期1-3,共3页
Journal of Dalian Maritime University
