摘要
本文采用内角为105°、外角为45°的模具对多晶Al-3%Mg材料进行了等径角挤压实验,研究了等径角挤压的剪切应变量对其力学性能的影响。结果表明:等径角挤压可以显著改善多晶Al-3%Mg材料的力学性能,而且剪切应变量的大小与材料的力学性能密切相关。经过等径角挤压,Al-3%Mg合金的抗拉强度和硬度得到显著提高,其中抗拉强度提高146.8%,硬度提高104.7%,而等径角挤压一次后,Al-3%Mg合金延伸率由5.85%下降至4.59%,此后材料的延伸率得到改善。
Al-3% Mg alloy was suffered from equal channel angular pressing（ECAP） in this experiment, in which an ECAP die with the inner angle ψ = 105°, outer angle ψ =45° was used. The influence of the strain value on ultimate strength （UTS） , hardness and elongation was studied. It shows that during ECAP the strain value of sample passing through the channels is very important for mechanical properties. ECAP can increase their UTS and hardness greatly. UTS and hardness of Al-3% Mg is 146.8% and 104.7% higher than that of the alloy before ECAP processed, respectively. But the elongation reduces from 5. 85% to 4.59 % after one passed ECAP, and then improves with the increase of passes.
出处
《人工晶体学报》
EI
CAS
CSCD
北大核心
2005年第4期593-596,共4页
Journal of Synthetic Crystals
基金
国家自然科学基金(No.130170269)资助项目
关键词
等径角挤压
多晶A1-3%Mg材料
应变量
力学性能
equal channel angular pressing （ECAP）
polycrystalline Al-3% Mg alloy
strain value
mechanical properties
