室温大气环境下欠时效态3J21合金的拉伸性能  

Tensile properties in under-aged state 3J21 alloy at room temperature in atmospheric conditions

作　　者：金晓鸥[1] 王正君[1] 何世禹[2] 张晶[1] 吕兴群[1] 

机构地区：[1]黑龙江大学建筑工程学院,黑龙江哈尔滨150080 [2]哈尔滨工业大学材料科学与工程学院,黑龙江哈尔滨150001

出　　处：《钢铁研究》2010年第3期17-19,23,共4页Research on Iron and Steel

基　　金：国家重点基础研究发展规划项目(G1999065005)

摘　　要：在万能拉伸试验机上对室温大气环境下欠时效态3J21合金的拉伸性能进行研究,并采用金相显微镜、X射线衍射仪对欠时效态金相组织及物相进行分析,采用TEM对固溶态、欠时效态试样及拉伸断口附近形变的显微组织进行分析,采用扫描电镜(SEM)对拉伸断口进行观察。结果表明,室温大气环境下欠时效态3J21合金的拉伸断口为韧窝断口,断口附近显微组织中滑移线之间的距离较小。欠时效态3J21合金具有较好的强度和塑性配合。同时讨论了室温大气环境下欠时效状态对3J21合金拉伸性能的影响。The tensile properties of 3J21 alloy in under-aged state was conducted on a universal tensile test machine at room temperature in atmospheric conditions.Moreover,a metallographic microscope and X-ray were used to analyze the metallographic structure and physical phase of the alloy in under-aged state.By employing a transmission electron microscope an analysis was conducted to the specimens of solid solution state and under-aged state as well as the microstructure of deformation near the tensile fracture.With the use of a scanning electron microscope a tensile fracture was observed.It was found that the tensile fracture of 3J21 alloy was a dimple fracture in under-aged state.The distance between the slip lines was smaller in the microstructure near the fracture of the alloy in under-aged state.The alloy in under-aged state featured a good match for the strength and plasticity.The influence of under-aged state on the tensile properties of 3J21 alloy is discussed at room temperature in atmospheric conditions.

关 键 词：3J21合金 欠时效 拉伸性能 

分 类 号：TG113[金属学及工艺—物理冶金]