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The high temperature low cycle fatigue tests of DZ22 superalloy and K403 superalloy are carried out under strain controlled. The low cycle fatigue test data of DZ22 superalloy at 850°C and K403 superalloy at 750°C are processed by Coffin-Manson method. When experimental data is processed, negative or small plastic strain values often appear and the results of life prediction fail to meet the needs...
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