高エネルギーX線回折と共焦点レーザー顕微鏡を用いた残留オーステナイト量が異なる低炭素高合金鋼のマルテンサイト変態過程のその場観察

抄録

Martensite transformation of supermartensitic stainless 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 austenite structure were analyzed which X-ray diffraction spots and electron back scattered diffraction patterns (EBSD). From the test results it could be concluded that the austenite phase is accommodated by rotation less that 3 degree of the crystallite when the martensite transformation is occurred. X-Ray diffraction integration strength of austenite was influenced by the transformation stress immediately after the martensite transformation. We consider that the diffracting power of parent phase of austenite increase during martensitie transformation, because the compression stress is accommodated, and the defect is introduced, resulting in the mosaic structure.