Al-Cu-Mg-Ag合金的热变形加工图及其分析  

The thermal deformation processing maps and their analysis of Al-Cu-Mg-Ag alloy

作　　者：曹素芳[1] 潘清林[1,2] 刘晓艳[1] 陆智伦[1] 何运斌[1] 李文斌[1] 

机构地区：[1]中南大学材料科学与工程学院,长沙410083 [2]有色金属材料科学与工程教育部重点实验室,长沙410083

出　　处：《材料科学与工艺》2011年第2期126-129,134,共5页Materials Science and Technology

摘　　要：为确定Al-Cu-Mg-Ag合金的热加工工艺制度提供理论依据以及便捷的途径,基于动态材料模型(DMM)理论和Ziegler失稳判据,采用Al-Cu-Mg-Ag合金的热变形实验数据,建立了热变形加工图,并利用加工图理论分析了该合金在热变形过程中的变形行为.结果表明:Al-Cu-Mg-Ag合金热变形时有2个失稳区域,一是变形温度为300～400℃、应变速率为0.1～10 s-1的区域,二是变形温度为450～500℃、应变速率为1.0～10 s-1的区域;该合金的热变形参数建议在变形温度350～450℃、应变速率0.001 s-1的范围内选取.To provide theoretical foundation and convenient way for the determination of thermal processing technology of AI-Cu-Mg-Ag alloy, the processing maps of this alloy were obtained from the thermal deformation experiment data, based on the dynamic material model （DMM） and Ziegler instability criterion, and the hot deformation behavior was characterized by the analysis of the processing maps. The results show that there are two unstable regions at 300 -400℃ and 0. 1 - 10 s^-1 and at 450 -500℃ and 1.0 - 10 s^-1. The temperature of 350 -450℃ and the strain rate of 0. 001 s^-1 are recommended.

关 键 词：AL-CU-MG-AG合金 加工图 热变形 动态材料模型 流变失稳 

分 类 号：TG146[一般工业技术—材料科学与工程]