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基于单向拉伸的防锈铝合金温热力学性能研究
引用本文:郎利辉,许爱军,李涛,赵香妮.基于单向拉伸的防锈铝合金温热力学性能研究[J].航空材料学报,2012,32(1):15-19.
作者姓名:郎利辉  许爱军  李涛  赵香妮
作者单位:北京航空航天大学机械工程及自动化学院,北京,100191
摘    要:通过不同温度及应变速率下的单向拉伸试验,获得了5A06-O防锈铝合金板材关键力学性能参数的变化规律。结果表明,在一定的应变速率下,5A06铝合金的流动应力及抗拉强度随着温度的升高而降低,断后延伸率随着温度的升高而显著的提高。当温度处在20~150℃范围内,均匀延伸率随着温度的升高而升高,而在150℃~300℃范围内,随着温度的升高而降低。另外,基于Fields&Backofen本构方程,对5A06铝合金在不同温度状态下的强化规律进行了分析和探讨,结果表明,随着温度的逐渐升高,应变强化指数不断减小,应变速率敏感系数则显著增大,应变速率强化作用明显增强。

关 键 词:防锈铝合金  温成形  热成形  成形性能  本构方程

Research on Warm and Hot Mechanical Property of Corrosion-resisting Aluminum Alloy Sheet Based on Uniaxial Tensile Test
LANG Li-hui , XU Ai-jun , LI Tao , ZHAO Xiang-ni.Research on Warm and Hot Mechanical Property of Corrosion-resisting Aluminum Alloy Sheet Based on Uniaxial Tensile Test[J].Journal of Aeronautical Materials,2012,32(1):15-19.
Authors:LANG Li-hui  XU Ai-jun  LI Tao  ZHAO Xiang-ni
Institution:(School of Mechanical Engineering and Automation,Beijing University of Aeronautics and Astronautics,Beijing 100191,China)
Abstract:The uniaxial tensile tests of corrosion-resisting aluminum alloy sheet 5A06-O with thickness of 1.2mm were performed at various temperatures ranging from 20℃ to 300℃ and at different strain rates in this study.It is shown that the flow stress and ultimate tensile strength of 5A06-O aluminum alloy in uniaxial tension decreases as the deformation temperature increases,while the total elongation increases along with the temperature increases.However,the uniform elongation increases with the temperature increasing from 20℃ to 150℃,while decreases with the temperature increasing from 150℃ to 300℃.In addition,hardening law of 5A06-O at different temperatures were analyzed and discussed based on Fields & Backofen constitutive equation.It is indicated that the strain hardening index decreases with increasing temperature,while the strain rate sensitivity coefficient increases observably along with the temperature increases.
Keywords:corrosion-resisting aluminum alloy  warm forming  hot forming  forming property  constitutive equation
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