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Acta Metall Sin  1991, Vol. 27 Issue (3): 82-85    DOI:
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EFFECT OF HETEROGENEOUS DISTRIBUTION OF C AND ALLOYING ELEMENTS ON γ/α′ TRANSFORMATION IN A Fe-Mn-Cr-C ALLOY
ZHENG Yasgzeng;ZHANG Fucheng Yanshan University; Qinhuangdao
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ZHENG Yasgzeng;ZHANG Fucheng Yanshan University; Qinhuangdao. EFFECT OF HETEROGENEOUS DISTRIBUTION OF C AND ALLOYING ELEMENTS ON γ/α′ TRANSFORMATION IN A Fe-Mn-Cr-C ALLOY. Acta Metall Sin, 1991, 27(3): 82-85.

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Abstract  The heterogeneous distribution of C and metallic alloying elements as well asthe phase composition changed before and after cold deformation of a Fe-Mn-Cr-C alloyhave been studied by Mossbauer spectroscopy. The austenites without and with C and metallicalloying elements are found in the alloy as solid solution treated state. While the martensiteswithout and with C and alloying elements may be induced by cold deformation. The transforma-tion from austenite to martensite in the alloy is confirmed via theoretical computation andexperiments to be controlled by the number of covalent electron pairs forming covalent bondin austenitic crystal cell of the alloy. The formation of strong covalent bond between C andmetallic elements will vigorously retard the γ/α′transformation.
Key words:  heterogeneity      solid solution      Mossbauer spectroscopy      strain induced martensite      valence electron structure     
Received:  18 March 1991     
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