摘要
对工业供应态LY12铝合金棒材的超塑性进行了研究。结果表明 :该合金在温度为 75 3K、应变速率为 3.3× 10 - 4s- 1的拉伸变形条件下 ,断裂延伸率为 313% ,应变速率敏感性指数m值约为 0 .33;断裂延伸率的实验值与Ghosh Ayres公式的理论值吻合 ;
Superplasticity of a commercial LY12 aluminum alloy is investigated. The alloy exhibits an elongation to break of 313% and a strain rate sensitivity ( m ) of about 0.33 at the condition of initial strain rate of 3.3×10 -4 s -1 and temperature of 753 K. The experimental value of elongation to break matches the theoretical value by Ghosh Ayres formula,and primary superplastic deformation mechanism is in agreement with Langdon model.
出处
《宇航材料工艺》
CAS
CSCD
北大核心
2002年第3期44-46,共3页
Aerospace Materials & Technology
基金
国家自然科学资金资助项目 5 963 10 80
