Al2O3-Cu/25Cr复合材料的热变形行为与热加工图
Hot deformation behavior and hot processing map of Al2O3-Cu/25Cr composite
李恒 1田保红 2周孟 2马紫鹏 1景柯 2刘勇2
作者信息
- 1. 河南科技大学材料科学与工程学院,河南洛阳 471023
- 2. 河南科技大学材料科学与工程学院,河南洛阳 471023;有色金属新材料与先进加工技术省部共建协同创新中心,河南洛阳 471023;河南省有色金属材料科学与加工技术重点实验室,河南 洛阳 471023
- 折叠
摘要
采用内氧化-快速热压烧结方法制备了 Al2O3-Cu/25Cr复合材料,利用Gleeble-1500D型热模拟试验机对其进行热变形试验(变形温度为600～900 ℃,变形速率为0.001～1s-1),绘制了其真应力-真应变曲线,根据双曲正弦模型计算了复合材料的热变形激活能和本构方程,得到了 Al2O3-Cu/25Cr复合材料热变形过程的热加工图.结果表明:Al2O3-Cu/25Cr复合材料的热变形激活能为287.227 kJ/mol,根据热加工图,确定了复合材料最佳的热加工工艺参数为变形温度为800～900℃、变形速率为 0.25～1 s-1.
Abstract
Al2O3-Cu/25Cr composite was prepared by internal oxidation-rapid hot press sintering method,the thermal deformation test of the composite was carried out using the Gleeble-1500D thermal simulation testing machine(with a deformation temperature of 600-900 ℃and a deformation rate of 0.001-1 s-1),and its true stress-strain curve was plotted.The hot deformation activation energy and constitutive equation of the composite were calculated based on the hyperbolic sine model,and the hot processing map of the Al2O3-Cu/25Cr composite during hot deformation was obtained.The results show that the hot deformation activation energy of the Al2O3-Cu/25Cr composite is 287.227 kJ/mol.Based on the hot processing map,the optimal hot processing parameters for the composite are determined to be deformation temperature of 800-900 ℃ and deformation rate of 0.25-1 s-1.
关键词
Al2O3-Cu/25Cr复合材料/热变形/本构方程/热加工图Key words
Al2O3-Cu/25Cr composite/hot deformation/constitutive equation/hot processing map引用本文复制引用
基金项目
国家自然科学基金(52071134)
河南省自然科学基金(232300420089)
河南省高校科技创新团队支持计划(22IRTSTHN001)
出版年
2024
NETL
NSTL
万方数据