EFFECTS OF DEFORMATION ON MICROSTRUCTURE AND σ-PHASE FORMATION IN Cr_(25)Ni_(20) STAINLESS STEEL

Acta Metall Sin

1988, Vol. 24

Issue (5): 376-378 DOI:

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EFFECTS OF DEFORMATION ON MICROSTRUCTURE AND σ-PHASE FORMATION IN Cr_(25)Ni_(20) STAINLESS STEEL

GAO Yan;LI Dejun;CAO Zhiben Dalian Institute of Technology; Liaoning

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GAO Yan;LI Dejun;CAO Zhiben Dalian Institute of Technology; Liaoning. EFFECTS OF DEFORMATION ON MICROSTRUCTURE AND σ-PHASE FORMATION IN Cr_(25)Ni_(20) STAINLESS STEEL. Acta Metall Sin, 1988, 24(5): 376-378.

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Abstract The microstructure of Cr_(25)Ni_(20) stainless steel under plastic deformation up to 50%has revealed an even distributed twins, microtwins and shear band. The σ-phase formation in800℃ aged specimens is accelerated by its nucleation on either deformed twins or recrystallizedgrain boundaries under less or more deformation respectively. In the recrystallization zone, the rec-rystallization is prior to the precipitation of σ-phase. Although the recrystallization may acceler-ate the formation of σ-phase, yet it is not essential. The twins and microtwins, produced by de-formation, may also provide the additional nucleation sites.

Key words: plastic derormation α-phase recrystallization

Received: 18 May 1988

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https://www.ams.org.cn/EN/ OR https://www.ams.org.cn/EN/Y1988/V24/I5/376

1 Lena A J, Curry W E. Trans ASM, 1955; 47: 193

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