Infrared thermography for non-destructive evaluation of aluminum alloy LY12CZ under low cycle fatigue
Aluminum alloy LY12CZ plain specimens of Low Cycle Fatigue (LCF) were tested on Instron8801 servo-hydraulic machine.During the whole loading process,a TbermaSC3000 infrared (IR) camera was used to monitor the surface ther-mographic images and the temperature response of the specimens.Lüders Bands were found during fatigue tests and static tension tests.The test results and fractographic analysis showed that both of the surface temperature variation and the micro-morphology were depended on the load rate and stress levels.Damage evolution was discussed base on residual modulus and cumulative plastic strain energy.A parameter Q,defined as the heat energy dissipated in a unit volume of material per cycle,was derived from Fouriers Law of the thermal conduction during fatigue loading.Compared with cumulative plastic strain energy,Q fairly well agreed with damage.
Thermal dissipation Infrared thermography Low cycle fatigue Temperature responds Damage evolution
Bin Li Xiaoyan Tong Zishan Li Qiyou Cheng Leijiang Yao
National Key Laboratory of Science and Technology on UA V,Northwestern Polytechnical University,Xi National Key Laboratory of Science and Technology on UA V,Northwestern Polytechnical University,Xi School of Aeronautics,Northwestern Polytechnical University,Xian 710072,China
国际会议
成都
英文
483-487
2009-10-16（万方平台首次上网日期，不代表论文的发表时间）