Effect of extrinsic grain-boundary dislocations on M23C6 precipitate nucleation in an austenitic stainless steel |
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| Authors: | R. A. Varin |
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| Affiliation: | (1) Institute of Materials Science and Engineering, Warsaw Technical University, 02-524 Warsaw, Narbutta 85, Poland;(2) Present address: Metallurgical Sciences Laboratory, Department of Mechanical Engineering, University of Manitoba, R3T 2N2 Winnipeg, Manitoba, Canada |
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| Abstract: | From a comparison of the isothermal precipitation curve for M23C6 grain-boundary precipitates in an austenitic stainless steel and of the spreading times of extrinsic grain-boundary dislocations (EGBDs), it has been shown that M23C6 precipitates cannot directly nucleate on EGBD lines lying on random high-angle grain boundaries. This process can occur only on coherent and incoherent twin and other special boundaries. |
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