GH3536板材电脉冲触发含能材料冲击成形的胀形变形行为  

Bulging deformation behavior of GH3536 sheet in electric-pulse triggered energetic-material forming

作　　者：刘龙雨 李昊桦 韩思雨 谢雪云 林俊峰[1,2] 于海平[1,2,3] Liu Longyu;Li Haohua;Han Siyu;Xie Xueyun;Lin Junfeng;Yu Haiping(School of Materials Science and Engineering,Harbin Institute of Technology,Harbin 150001,China;National Key Laboratory of Precision Hot Processing of Metal,Harbin Institute of Technology,Harbin 150001,China;Suzhou Research Institute of HIT,Suzhou 215104,China)

机构地区：[1]哈尔滨工业大学材料科学与工程学院,黑龙江哈尔滨150001 [2]哈尔滨工业大学金属精密热加工国家级重点实验室,黑龙江哈尔滨150001 [3]哈工大苏州研究院,江苏苏州215104

出　　处：《锻压技术》2024年第12期41-51,共11页Forging & Stamping Technology

基　　金：国家自然科学基金面上资助项目(52175304)。

摘　　要：针对GH3536高温合金板材在室温下成形难度大的问题,采用电脉冲触发含能材料冲击成形(ETEF)工艺,研究了GH3536高温合金板材的胀形变形行为。首先,通过准静态拉伸和动态拉伸实验确定了GH3536高温合金的应变率敏感性和JC模型,在高应变速率下,其抗拉强度和伸长率明显提升。其次,进行了不同质量含能材料的ETEF实验和电液成形(EHF)实验,在相同胀形高度下,ETEF试样相比于EHF试样应变集中区明显拓宽,最大主应变和壁厚减薄率降低。最后,借助ANSYS/LS-DYNA软件和J-C模型建立了GH3536高温合金板材的ETEF数值模型,模拟结果显示,板材在圆角区先于中心区达到最大变形,Y向(竖直方向)速度在变形过程中有二次提升,使得板材高速变形的时间增加,证明了ETEF具有“保压”效果,且等效塑性应变云图呈圆形,板材变形更加均匀。Addressing the issue of difficulty forming for super alloy GH3536 sheet at room temperature,the electric-pulse triggered energetic-material forming(ETEF)process was used to investigate the bulging deformation behavior of super alloy GH3536 sheet under this process.Firstly,the strain rate sensitivity and J-C model of super alloy GH3536 were determined through quasi-static tensile and dynamic tensile experiments.At high strain rate,its tensile strength and elongation were significantly improved.Secondly,the ETEF experiment of different masses of energetic materials and the electro-hydraulic forming(EHF)experiment were carried out.At the same bulging height,the strain concentration zone of ETEF specimens is significantly widened compared to EHF specimens,with a decrease in maximum principal strain and a decrease in thinning rate.Finally,with the help of ANSYS/LS-DYNA software and J-C model,an ETEF numerical model of super alloy GH3536 sheet was established.The simulation results show that the sheet reaches the maximum deformation in the rounded corner area before the center area,and the velocity along the Y-direction(vertical direction)increases again during the deformation process,which increases the time of high-speed deformation for the sheet.It has been proven that ETEF has a“pressure holding”effect,and the equivalent plastic strain cloud map is circular,resulting in more uniform deformation of the sheet metal.

关 键 词：电液成形 含能材料 GH3536高温合金 高速率变形 动态变形行为 

分 类 号：TG39[金属学及工艺—金属压力加工]