钨铜合金热变形行为及本构方程  

Thermal Deformation Behavior and Constitutive Equation of Tungsten Copper Alloy

作　　者：张义飞 宋德学[3] 王毅 李攀科[1,2] 王超 ZHANG Yifei;SONG Dexue;WANG Yi;LI Panke;WANG Chao(China Airborne Missle Academy,Luoyang 471009,China;National Key Laboratory of Air-based Information Perception and Fusion,Luoyang 471009,China;Zhengzhou University of Aeronautics,School of Mechanical Engineering,Zhengzhou 450046,China;ZHEJIANG XCC GROUP CO.,LTD.Shaoxing 312500,China)

机构地区：[1]空基信息感知与融合全国重点实验室,河南洛阳471009 [2]中国空空导弹研究院,河南洛阳471009 [3]郑州航空工业管理学院机械工程学院,河南郑州450046 [4]浙江五洲新春集团股份有限公司,浙江绍兴312500

出　　处：《河南科技》2024年第24期69-78,共10页Henan Science and Technology

基　　金：河南省科技攻关计划项目(220102210209);河南省重点研发专项项目(221111230700);河南省重点研发专项项目(221111230700);航空科学基金(20220001055003);河南省高等学校重点科研项目(23A590002);郑州航院研究生教育创新计划基金(2023CX63)。

摘　　要：【目的】钨铜合金是航空航天和军工领域用关键材料,但钨铜合金流动应力应变的研究采用的本构方程的准确性较差,需要对其加以研究。【方法】采用真空拉伸试验机对钨铜合金进行了不同温度、不同应变速率下的高温拉伸实验,研究其热变形行为,并建立了钨铜合金的本构方程。【结果】结果表明,钨铜合金存在着明显的温度软化效应和加工硬化效应,其流变应力随温度升高和应变速率降低而降低。利用相关系数和绝对平均误差可衡量本构方程的准确性。【结论】应变补偿程可大幅提高钨铜合金本构的准确度。[Purposes]Tungsten-copper alloy is a key material used in the aerospace and military fields.However,the accuracy of the constitutive equations adopted in the research on the flow stress and strain of tungsten-copper alloy is rather poor,which needs to be further studied.[Methods]High-temperature tensile experiments on tungsten-copper alloys were carried out under different temperatures and strain rates using a vacuum tensile testing machine to study the thermal deformation behavior,and the constitutive equation of the tungsten-copper alloy was established.[Findings]The results show that the tungsten-copper alloy has obvious temperature softening effect and work hardening effect,and its flow stress decreases with the increase of temperature and the decrease of strain rate.The accuracy of the constitutive equation can be measured by using the correlation coefficient and the absolute average error.[Conclusions]Strain compensation can significantly improve the accuracy of the constitutive equation of tungsten-copper alloy.

关 键 词：钨铜合金 热变形行为 本构方程 

分 类 号：TG146.1[一般工业技术—材料科学与工程]