摘要
研究了ZTC4合金在温度700～900℃、应变速率10^(-2)～30s^(-1)、最大变形程度70%条件下的温变形行为,结合试样开裂状态,获得了ZTC4合金单向压缩成形性能,并对其微观组织进行了分析。结果表明:ZTC4合金是一种温度、应变速率敏感材料,流动应力随应变速率增加、温度下降而明显上升,其流动曲线具有应力峰和变形软化特征,在ε≥0.8～0.9以后,流动应力趋于饱和稳定状态;通过控制变形温度和应变速率等参数,在(α+β)两相区可实现ZTC4合金的塑性变形,同时细化其组织。
Warm compressive deformation of ZTC4 titanium alloy were carried out with Hot-simulator of Gleeble-1500 over the range of deformation temperature from 700 to 900 ℃, strain rate from 0.01 to 30 s^-1, and maximum deformation extent 70%. The formability in uniaxial compression was obtained and microstructure was analyzed by the method of metallurgy. The experimental results showed that ZTC4 titanium alloy is sensitive to deformation temperature and deformation rate. The flow stress increases with the increase of strain rate and the decrease of deformation temperature. The peak flow stress appears below 850 ℃ and the flow stress tends to become steady gradually when ε≥0.8～0.9. It is feasible to realize plastic deformation and refine grain for ZTC4 alloy through controlling working parameters such as deformation temperature and strain rate.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2007年第A03期616-619,共4页
Rare Metal Materials and Engineering
基金
"先进制造技术预研项目"资助(51318040306)
