In-Situ Observation of Martensite Transformation of Low Carbon High Alloy Steel Using High Temperature Laser Scanning Confocal Microscopy and X-ray Diffraction by Synchrotron Radiation

Abstract

Martensite transformation of Low carbon high alloy steel during cooling was in-situ observed by using high temperature laser scanning confocal microscopy and X-ray diffraction by Synchrotron radiation. The crystallography of martensite and retained austenite structure were analyzed by electron back scattered diffraction patterns (EBSD). From the test results it could be concluded that the austenite phase is stress- relieved by twin deformation when the martensite transformation is occurred.