汽车车身用6016铝合金薄板应变硬化指数研究  

Study on the strain hardening exponent of 6016 aluminum sheet for automotive body

作　　者：孙黎明[1] 田妮[2] 丛福官[1] 王凤春[1] 

机构地区：[1]东北轻合金有限责任公司,黑龙江哈尔滨150060 [2]东北大学材料各向异性与织构教育部重点实验室,辽宁沈阳110004

出　　处：《轻合金加工技术》2014年第11期15-20,共6页Light Alloy Fabrication Technology

摘　　要：采用单向拉伸试验研究了自然时效态及低温人工时效态6016铝合金薄板的基本成形性参数,以此为基础,定义并计算了连续应变硬化指数nc和瞬时应变硬化指数ns。结果发现6016铝合金薄板的连续应变硬化指数先增大后趋于稳定,nc与应变ε符合Sweibull2函数关系,瞬时应变硬化指数先增大后降低,ns与应变ε符合Explinear函数关系。The fundamental formability parameters of 6016 aluminum sheet after natural aging and low-temperature artificial aging treatment are measured by the uniaxial tensile test. Based on the results of the test, this paper defines and calculates two types of strain-hardening exponent named continuous strain-hardening exponent nc and instantaneous strain-hard- ening exponent ns respectively. The results show that nc increases rapidly during the early stage of plastic deformation and finally becomes plateaued, while ns decreases after earlystage increasing. In detail, the relation between nc and strain ε corresponds to Sweibull2 function,while the relation between ns and strain ε corresponds to Explinear function.

关 键 词：6016铝合金 薄板 时效 应变硬化指数 

分 类 号：U463.82[机械工程—车辆工程] U465[交通运输工程—载运工具运用工程]