The embrittling behavior has been investigated by Charpy impact tests, scanning electron microscopy and scanning Auger microscopy. Specimens water quenched from the solution temperature (1373 K) fracture in the transgranular cleavage mode at a temperature below 280 K. If the cooling rate from the solution temperature is small, the steel fractures in the intergranular mode, resulting in a rise in the ductile-brittle transition temperature. Grain boundary brittleness proceeds during slow cooling below the MS temperatures. Train boundary strength is slightly higher than the transgranular cleavage fracture strength.
|Number of pages||6|
|Journal||Nippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals|
|Publication status||Published - Nov 1986|
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