摘要
通过Gleebe试验机对Cu-Cr0.44-Sn0.34-Zn0.2-Ce0.01合金进行单道次高温等温压缩试验,得出实验合金的应力应变数据。变形条件是应变速率0.01,0.1,1和5 s-1,变形温度600,700和800℃,最大变形程度为真实应变0.6。通过对数据的计算,得到加工硬化率-应变曲线、动态再结晶临界应力、动态再结晶临界应变。通过微观组织分析了该合金的连续动态再结晶特征。最后分析临界应力应变与变形条件的关系。结果表明,对于没有明显应力峰值的应力应变曲线,使用加工硬化率方法是研究热变形过程中动态再结晶临界应变的一种有效方法。
High temperature compression tests of a Cu-Cr0.44-Sn0.34-Zn0. 2-Ce0.01 alloy were carried out on a Gleeble-1500D thermal simulator to get stress-strain data of the alloy. The strain rates of 0.01 s -1-5 s-1 and the deformation temperature of 600 ℃-800 ℃ were used in the experiments. The maximum deformation was 0.6. Based on the experimental data, the work hardening rate-strain curve, dynamic reerystallization critical stress and dynamic critical recrystallization strain were obtained. The continuous dynamic recrystall- ization features of the alloy were analyzed by the microstructure observation. The relationship between the deformation condition and the critical stress and strain was studied. The results show that for the alloys, for which no apparent peak stress of stress-strain cure exists, the work hardening rate method is an effective method to study the critical strain of dynamic recrystallization in the process of thermal defomation.
出处
《材料热处理学报》
EI
CAS
CSCD
北大核心
2013年第11期104-108,共5页
Transactions of Materials and Heat Treatment
基金
河南省科技攻关计划项目(102102210174)
长江学者和创新团队发展计划资助(IRT1234)
