摘要
研究等温热处理对半固态AZ91D镁合金组织的影响。结果表明,随着保温温度的提高和保温时间的延长初生α-Mg相的圆整度提高。在等温热处理过程中,半固态组织经历了组织分离、球化和粗化长大三个过程。半固态组织中的液相由液池、小液池和液相薄膜3部分组成,固相由初生α-Mg相和二次凝固时形成的α-Mg相2部分组成。
The effect of isothermal heat treatment on the microstructure evolution of semi- solid AZ91 D magnesium alloy was investigated. The results show that the roundness of the primary α- Mg phase increases with the increasing temperature and time. The microstructure evolution of the semi-solid AZ91 D experiences three stages during isothermal heat treatment process, i.e. the structure separation,spheroidization and final coarsening. The liquid phase of semi- solid alloy has three types, namely, the molten pool, the'entrapped liquid'pool and the liner liquid film which separates two neighbor particles.The solid phase has two types, namely, the primary α-Mg particles and the α-Mg phase formed in the second solidification.
出处
《材料研究学报》
EI
CAS
CSCD
北大核心
2014年第12期909-913,共5页
Chinese Journal of Materials Research
基金
江西省青年科学基金20142BAB216015
江西钨铜新材料重点实验室开放基金2013-KLP-07资助项目~~
关键词
金属材料
等温热处理
AZ91D镁合金
半固态
显微组织
metallic materials,isothermal heat treatment,AZ91D magnesium alloy,semi-solid,microstructure
