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| THE EFFECT OF PRIOR AUSTENITIC GRAIN BOUNDARIES ON NUCLEATION OF(225)_γ MARTENSITE IN STEELS |
| ZHANG Xingquan;HE Xianming Shanghai Polytechnic University No.2 |
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Cite this article:
ZHANG Xingquan;HE Xianming Shanghai Polytechnic University No.2. THE EFFECT OF PRIOR AUSTENITIC GRAIN BOUNDARIES ON NUCLEATION OF(225)_γ MARTENSITE IN STEELS. Acta Metall Sin, 1985, 21(3): 1-6.
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Abstract Results are Presented for the relationship between the number of(225)_γ mar-tensite plates per unit volume,N_v,and the mean diameter of prior austenitegrain,D,for steel T10A and GCr15 being N_v=N_0 (?),where N_0 is a con-stant.This relationship may be derived by the theory of dislocation of plastic de-formation in polycrystal at lower temperature under applied driving force of phasetransformation.Accordingly,the nucleation of(225)_γ martensite is the result ofon set of the motion of dislocation source under the applied driving force of phasetransformation.Consequently,these might be no pre-existing martensite nucleus,but are pre-existing dislocation sources.The austenite grain refinement may bean effective method for refining the martensite plates.
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Received: 18 March 1985
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