摘要
分析了Li加入Al-Mg-Si体系后相的析出和组织变化，计算了几个典型的相图截面，并对三种典型合金进行了TEM观测验证．相图计算表明．Li加入Ai－Mg－Si体系后，在平衡状态下，δ为主要析出相，还形成富Si相AlLiSi和Mg2Si；在非平衡的实际析出状态下，亚稳相δ＇成为主要拆出相.δ＇相的析出抑制Mg2Si的形成，增加Mg含量可在一定程度上促进Mg2Si的析出.
The effect of Li addition on the precipitation behavior of Al-Mg-Si alloy has been investigated by means of thermodynamic calculation and TEM observation. The addition of Li changed the precipitation behavior of Al-Mg-Si alloys. At equilibrium condition, δ phase was the predominant precipitate, and AlLiSi. Mg2Si phases precipitated as well. At non-equilibrium aging condition,metastable δ' phase became the predominant phase. The precipitation of δ' phase inhibited the formation of Mg2Si phase. Increasing Mg content can promote the precipitation of Mg2Si phase.
出处
《材料研究学报》
EI
CAS
CSCD
北大核心
2000年第3期271-276,共6页
Chinese Journal of Materials Research
