摘要
采用Gleeble-1500D热模拟试验机,在温度为550900℃,应变速率为0.00110 s-1的条件下对Cu-7Ni-7Al-2Fe-2Mn-0.5Ti合金的热变形行为进行研究。分析应变速率和变形温度对合金热变形组织的影响,建立合金Cu-7Ni-7Al-2Fe-2Mn-0.5Ti的热变形本构方程。结果表明：Cu-7Ni-7Al-2Fe-2Mn-0.5Ti合金高温热变形时的热变形激活能Q为318883 J·mol-1,合金的流变应力随变形温度的升高和应变速率的降低而降低。当变形温度较高、应变速率较低时,合金容易发生动态再结晶。
Hot deformation behaviors of Cu-7Ni-7Al-2Fe-2Mn-0.5Ti alloy at 550-900 ℃ and strain rate of 0.001-10 s-1 were studied by using a Gleeble-1500D thermal simulation test machine.The effects of strain rate and deformation temperature on microstructure evolution of the alloy were analyzed and the thermal deformation constitutive equation of the alloy was established.The results show that the hot deformation activation energy of the Cu-7Ni-7Al-2Fe-2Mn-0.5Ti alloy at high temperature is 318883 J·mol-1,and the flow stress of the alloy decreases with the increasing of deformation temperature and the decreasing of the strain rate.When the deformation temperature is high and the strain rate is low,the dynamic recrystallization of the alloy is more likely to occur.
出处
《材料热处理学报》
EI
CAS
CSCD
北大核心
2018年第3期131-135,共5页
Transactions of Materials and Heat Treatment
基金
国家重点研发计划基金(2016YFB0301400)
