Acta Metall Sin  1988, Vol. 24 Issue (6): 379-385    DOI:

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PHASE TRANSFORMATION UNIT OF BAINITIC FERRITE AND ITS SURFACE RELIEF IN LOW AND MEDIUM CARBON ALLOY STEELS

YU Degang;CHEN Dajun;ZHENG Jinghong;HE Yirong;SHEN Fufa Shanghai Jiaotong University

YU Degang;CHEN Dajun;ZHENG Jinghong;HE Yirong;SHEN Fufa Shanghai Jiaotong University. PHASE TRANSFORMATION UNIT OF BAINITIC FERRITE AND ITS SURFACE RELIEF IN LOW AND MEDIUM CARBON ALLOY STEELS. Acta Metall Sin, 1988, 24(6): 379-385.

Abstract References Related Articles Recommended Metrics Download:  PDF(2162KB)  Export:  BibTeX | EndNote (RIS)       Abstract  The lath-or plate shaped bainitic ferrite of low and medium carbonalloy steels consists of packets of ferrite sublaths which are composed of manyfiner and regular ferrite blocks. They are uniform shear growth units of bainiticferrite phase transformation. No carbide is precipitated from them. The bainitic θ-carbides are precipitated from γ-α interface or carbon-rich austenite. The mode ofarrangement of the units in ferrite sublath packet is in uni- or bi-direction. Singlesurface relief is produced by the accumulation of uniform shear strains of all theferrite units arranged unidirectionally in a sublath packet, while tent-shaped surfacerelief is formed by the integration of the uniform shear strains of two groups withferrite units piling up in two-directions growing face to face; whereas if they growback to back, the integration will be responsible for inverttent-shaped surfacerelief. The interface trace between two groups of ferrite units in a sublath packetis shown as "midrib". Key words:  low and medium carbon alloy steel      bainite      ferrite      phase transformation unit      surface relief      Received:  18 June 1988      Service E-mail this article Add to citation manager E-mail Alert RSS （） Articles by authors URL:  https://www.ams.org.cn/EN/     OR     https://www.ams.org.cn/EN/Y1988/V24/I6/379 1 Hehemann R F, Kinsman K R, Aaronson H I. Metall Trans, 1972; 3: 1077 2 Bhadeshia H K D H, Edmonds D V. 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