摘要
对IC10合金在1073~1373K范围内、不同应变率下开展了拉伸试验研究,试验结果表明:IC10合金在1073K附近表现出明显的动态回复力学特征,在1173~1373K范围内则表现出明显的动态再结晶特征。通过透射电子显微镜对试验样品进行观察,研究了IC10合金变形机理,结果表明,在1073~1373K范围内,IC10合金变形过程中螺位错和刃位错可动性相当,并在γ′相边界逐步形成一些胞状亚晶结构。最后,将工程中应用广泛的Sellars模型应用于描述IC10合金在1073~1373K范围内、不同应变率下的力学行为,预测结果与试验结果的平均相对误差值不超过5%。
Various tensile experiments were conducted over the temperature range of 1073-1373K at different strain rates.Experimental results show：dynamic recovery is the dominate behavior at 1073 K,and the dominate behavior over the temperature range of 1173~1373K is dynamic recrystallization.The behavior mechanism was studied by transmission electron microscope（TEM）tests.And the observation results show：there are both edge and screw dislocations on the cube plane,and these dislocations have a tendency to form the subgrains at the interphase boundaries ofγ′,which is the dominate mechanism of recrystallization behaviors.At last,Sellars model,a most widely used macro constitutive model,was used to predict the flow behaviors of alloy IC10 over the temperature ranges from 1073 to 1373K and under different strain rates.The predicted data fits well with the experimental ones,and the average relative errors at various conditions are less than 5%.
出处
《中国机械工程》
EI
CAS
CSCD
北大核心
2017年第18期2256-2261,共6页
China Mechanical Engineering
基金
国家自然科学基金资助项目(51205190)
中央高校基本科研业务费专项资金资助项目(NS2016026)
关键词
IC10合金
动态回复
动态再结晶
本构模型
细观机理
alloy IC10
dynamic recovery
dynamic recrystallization
constitutive equation
micro mechanism
