摘要
采用Bc路径对6061铝合金进行了4道次等径角挤压，研究了在应变速率为0．05～0．50S-1、等温处理温度为603～629℃条件下的半固态等温压缩特性，分析了变形温度及应变速率对真应力-真应变曲线的影响。结果表明，等温压缩过程中，6061铝合金的流动应力随变形温度的升高而降低，随应变速率的增加而升高；在变形过程中出现固一液偏析现象，变形较大时固一液偏析现象较明显。纪兴华。
6061 aluminum alloy was successfully processed by four-pass equal channel angular extrusion （ECAE） through Be routes. Isothermal compression behavior was tested at strain rates ranging from 0.05 to 1 s-1 and deformation temperate at 603～629 ℃. The true stress-strain curves were analyzed and semi-solid isothermal compression mechanism was described. Influences of deformation temperature and strain rate on the curves were analyzed. The results show that during the isothermal compression, solid-liquid separation occurs, and the flow stress of 6061 aluminum alloy is decreased with increasing in deformation temperature and increased with increasing in strain rates.
出处
《特种铸造及有色合金》
CAS
CSCD
北大核心
2014年第7期710-712,共3页
Special Casting & Nonferrous Alloys
基金
国家自然科学基金资助项目(51175018)
莱芜市高新区创新发展资助项目
校教师科研基金资助项目(201308JC10
201308JX13)
