摘要
本文研究了硬度相差较大的两相合金QA110-3-1.5铝青铜超塑变形机制。其中的α相较硬,晶粒不易变形,β相较软,晶粒易于塑性变形,且没有固定形状。晶界滑动是超塑变形的主要机制,晶内位错滑移和扩散蠕变则对晶界滑动起着协调作用。
Mechanism of superplastic flow of QAl10-3-1.5 aluminium bronze has been investigated. The two phases of the alloy have quite different hardness.phase is hard and rarely deforms. In contrast, β-phase is relatively softer,therefore, is deformed easier and has irregular grain shape. It is shown that grain boundary sliding is the dominate flow mechanism and is accommodated by intergranular dislocation slip and diffusion creep.
基金
国家自然科学基金
关键词
铝青铜
超塑性
变形机制
铜合金
superplasticity
alumium bronze
grain boundary sliding
intergranular dislocation slip
diffusion creep
