摘要
在应变速率为5.56×10-5～5.56×10-3 s-1的范围内,温度223～773 K,对3004铝合金进行了系列拉伸试验,探索其形变规律.结果表明:3004铝合金在形变过程中会出现动态应变时效现象;在给定的应变速率下,动态应变时效仅发生在一定的温区;在该温区内,应变速率敏感性出现了负值,强度出现了一个平台,加工硬化速率出现峰值,拉伸断口呈现脆性特征.
The tensile deformation characteristics of 3004 aluminum alloy have been studied at a range of strain rates （5.56×10^-5～5.56×10^-3s^-1） and temperatures （223 773 K）. 3004 aluminum alloy showed the phenomenon of dynamic strain aging（DSA） during tensile deformation. The dynamic strain aging occurred in a certain temperature range at a strain rate. There was a negative strain rate dependence of the flow stress, flow stress platform and strain-hardening rate peak within the temperature range of serrated flow, and the tensile fracture pattern also exhibited “blue brittle”.
出处
《机械工程材料》
CAS
CSCD
北大核心
2005年第12期13-16,共4页
Materials For Mechanical Engineering
基金
国家自然科学基金资助项目(50441013)
福建省教育厅资助项目(JA03015)
关键词
锯齿屈服
动态应变时效
铝合金
拉伸变形
serrated flow
dynamic strain aging
aluminum alloy
tensile deformation
