MULTICOMPONENT SEGREGATION ALONG BOUNDARY AND THERMODYNAMICAL ANALYSIS OF Fe-C-Si-Mn ALLOY

Acta Metall Sin

1991, Vol. 27

Issue (3): 101-105 DOI:

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MULTICOMPONENT SEGREGATION ALONG BOUNDARY AND THERMODYNAMICAL ANALYSIS OF Fe-C-Si-Mn ALLOY

LI Shuchen;LIU Shikai Southwestern Jiaotong University; Chengdu

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LI Shuchen;LIU Shikai Southwestern Jiaotong University; Chengdu. MULTICOMPONENT SEGREGATION ALONG BOUNDARY AND THERMODYNAMICAL ANALYSIS OF Fe-C-Si-Mn ALLOY. Acta Metall Sin, 1991, 27(3): 101-105.

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Abstract Studies were made of the positive segregation of C and Mn as wellas negative one of Si along the original austenite boundary in 475℃ isothermalFe-C-Si-Mn alloy by means of Auger spectroscopy and SIMS. According to thethermodynamical calculation of partial molar free energy and activity of grainboundary segregation, it was indicated that the Si and Mn may promote the segrega-tion of C along grain boundary and depress its activity. Thus, the shift of theupper bainite TTT diagram to right may be easily explained.

Key words: Fe-C-Si-Mn alloy segregation energy activity

Received: 18 March 1991

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https://www.ams.org.cn/EN/ OR https://www.ams.org.cn/EN/Y1991/V27/I3/101

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