Acta Metall Sin  1998, Vol. 34 Issue (10): 1009-1015    DOI:

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FINE STRUCTURE AND CRYSTALLOGRAPHY OF ISOTHERMAL LOWER BAINITE IN AN EXPERIMENTAL STEEL 38Si2Mn2Mo

LUO Chengping(C.P.Luo);LIU Jiangwen;XIAO Xiaoling(Department of Mechanical Engineering; South China University of Technology; Guangzhou 510641)Correspondent:LUO Chengping; professor; Tel:(020)85511617; Fax: (020)87111312;E-mail: mecpluo@letterbox.scut.edu.cn

LUO Chengping(C.P.Luo);LIU Jiangwen;XIAO Xiaoling(Department of Mechanical Engineering; South China University of Technology; Guangzhou 510641)Correspondent:LUO Chengping; professor; Tel:(020)85511617; Fax: (020)87111312;E-mail: mecpluo@letterbox.scut.edu.cn. FINE STRUCTURE AND CRYSTALLOGRAPHY OF ISOTHERMAL LOWER BAINITE IN AN EXPERIMENTAL STEEL 38Si2Mn2Mo. Acta Metall Sin, 1998, 34(10): 1009-1015.

Abstract References Related Articles Recommended Metrics Download:  PDF(2418KB)  Export:  BibTeX | EndNote (RIS)       Abstract  The fine structure and crystallography of lower bainite produced in an exgerimental steel 38Si2Mn2Mo isothermally treated at 320℃ were studied using TEM. The lowerbainite contained midrib, subunit, retained austeuite and ε-carbide, and high density of dislocation exist in both the bainite and retained austenite. The habit plane (HP) of the bainitemeasured by double edge-on trace analysis was found ciose to {11,7,15}f, while its orieatationrelationship (OR) with the austeuite matrix was the G-T one. The bainite plates were related toeach other by a relative rotation of about 54.7° or 60° about the normal to their common planes{110}b, which resulted in an approtoate {112}b twin relationship between adjjacent plates. TheOR and HP of the lower bainite were found identical with, and close to tho1122se of the lath martensiterespectively, all in reasonable agreement with the predictions from the phenomenological theoryof martensite crystallography (PTMC). All these results show that the bainitic transformationpossesses the characters of matensitic transformation. Key words:  steel 38Si2Mn2Mo      lower bainite      fine structure      TEM      phenomenological theory of martensite crystallography      Received:  18 October 1998      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/Y1998/V34/I10/1009 1 Hehemann R F, Kinsmann K R, Aaronson H I. Metall Trans, 1972; 5A:1077 2 Cohen M, Bhadeshia H K D H, Aaronson H I. Metall Trans, 1990; 21A: 767, 2369 3 Wayman C M, Aaronson H I, Hirth J P. Metall Trans, 1994; 25A: 1787, 2655 4 Sriniruan G R, Wayman C M. 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