Investigation on in-situ tensile of extruded 1420 Al-Li alloy
In-situ tensile tests of extruded 1420 Al-Li alloy were investigated in field emission scanning electron microscope.Results show that the fracture process is as follows:in the initial stage of tension,the dislocation begins to move,and pile up when meeting strengthening phases; the dislocation cuts through the strengthening phases,and induces their break; the subsequent dislocation moves through the broken strengthening phases,leading to the initiating and propagating fast of the cracks; with opening of small cracks produced at multiple sites,the longer cracks form and keep the propagating,at last the main crack form,result in the fracture of the sample.The fracture mode of extruded 1420 alloy is mixture of ductile and transgranular fracture.The weak texture of extruded 1420 sample transformed from texture 001 〈 100〉 to 018 〈081 〉 similar to texture 001 〈100〉 of cubic system after tension fracture.
extruded 1420 Al-Li alloy in-situ tension fracture texture
Zhongwei Chen Jing Zhao Shishun Li Jizhao Zou
State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xian 7100 Shenzhen Key Laboratory of Special Functional Materials, Shenzhen University, Shenzhen 518060, China
国际会议
厦门
英文
705-708
2012-01-04（万方平台首次上网日期，不代表论文的发表时间）