IN SITU TEM OBSERVATION OF MICROSTRUCTURES OF AUSTENITIC-0.45%C STEELS WELD JOINT
奥氏体钢-45钢焊缝组织的透射电镜原位观察

The structural alteration from weld metal, weld bond to heat affected zone of a Cr18Ni13 austenitic-0.45%C steels weld joint was successively observed in situ under TEM. Their morphologies and compositions were also analyzed. A new type of microstructure called pearlite- like was found. The differentiation of characteristics into various zones across the weld joint is featured by TEM photos in contrast to the conventional metallographs.