Acta Metall Sin  1994, Vol. 30 Issue (9): 385-393    DOI:

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BAINITIC TRANSFORMATION UNITS AND FORMATION OF MARTENSITE-LIKE BAINITE IN Fe-C ALLOYS

YU Degang; ZHU Yuru; CHEN Dajun; TANG Xiaohong; ZHANG Huijuan(Shanghai Jiaotong University)(Manuscript received 6 January;1994; in revised form 23 May; 1994)

YU Degang; ZHU Yuru; CHEN Dajun; TANG Xiaohong; ZHANG Huijuan(Shanghai Jiaotong University)(Manuscript received 6 January;1994; in revised form 23 May; 1994). BAINITIC TRANSFORMATION UNITS AND FORMATION OF MARTENSITE-LIKE BAINITE IN Fe-C ALLOYS. Acta Metall Sin, 1994, 30(9): 385-393.

Abstract References Related Articles Recommended Metrics Download:  PDF(700KB)  Export:  BibTeX | EndNote (RIS)       Abstract  The occurrence of bainitic ferrite transformation units, namely, shear transformation units,in Fe-C alloys was repeatedly confirmed by various observations,and a sketch illustrating their morphology was given.Some martensite-like bainites,such as regular triangular, crossed,"N"- and butterfly-type,were observed in the alloys. The crossed bainite may be further divided into 4 types,i.e.,units of relative glide disjunction,"wasp- waist"formation and exchange growing orientation.The crossing effect reflects directly on movement of bainite units during transformation.The induced crossed stress field is one of the shear stress concentration under shear transformation.The formation of bainite crossing is caused in the shear stress-strain induced bainitic transformation.The compensation value for the driving force of transformation is proportional to the square of true strain of austenite.The extraordinal violence of impingement brought about by the growing bainite plates can only be explained through shear mechanism of bainitic transformation.Correspondent: YU Degang, professor,(Departrnent of Materials Science, Shanghai Jiaotong University,Shanghai 200030) Key words:  transformation unit      martensite-like bainite      Fe-C alloy      Received:  18 September 1994      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/Y1994/V30/I9/385 1OblackJM,HehemannRF．TransformationandHardenabilityinSteels．ClimaxMolybdenum、AnnArbor,MI,1969:152OhmoriY,OhtaniH,KunitakeT．TransIronSteelInstJpn,1971;11:2503BhadcshiaHKDH,EdmondsDV．ActaMetall．1980;28:12654俞德刚,陈大军,郑经,何忆蓉,沈甫法,金属学报,1988;24:A3795SpanosG,FangHS,AaronsonHI．MetallTrans,1990;21A:l3816SandvikBPJ．MetallTrans．1982;13A:7777AaronsonHI．MetallTrans．1986;17A:10958WollantsP,BonteMDe,RoosIR．ZMetallk,1979;70:113 [1] GAO Ao WANG Qiang LI Dejun CHAI Haishan ZHAO Lijia HE Jicheng. STATE OF Fe-C ALLOY IN THE ELECTROMAGNETIC STEEL-TEEMING SYSTEM[J]. 金属学报, 2011, 47(2): 219-223. [2] Xiang Zhao; Shoujing WANG; GONG Ming-Long; liang zuo. Influence of austenization temperature on the morphology of pearlite in Fe-0.12%C alloy under high magnetic field[J]. 金属学报, 2008, 44(11): 1305-1309 . [3] JIANG Jianqing(Southeast University;Nanjing). EFFECTS OF GRAPHITE MORPHOLOGY AND MATRICES ON FRACTURE BEHAVIOUR OF CAST IRONS[J]. 金属学报, 1994, 30(8): 374-379. [4] YANG Liu;FANG Hongsheng;MENG Zhihe Southwestern Jiaotong university; Chengdu; Tsinghua University; Beijing; Luoyang Institute of Technology. KINETICS OF AUSTENITIC ISOTHERMAL DECOMPOSITION AND Mn PARTITION IN Fe-C-Mn-B ALLOYS[J]. 金属学报, 1992, 28(1): 16-20. [5] WANG Shidao;YU Degang Lanzhou Railway Institute Shanghai Jiaotong University. THERMODYNAMIC STUDY OF BAINITIC TRANSFORMATION IN Fe-C ALLOYS[J]. 金属学报, 1989, 25(4): 23-29. [6] 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[J]. 金属学报, 1988, 24(6): 379-385. No Suggested Reading articles found! Viewed Full text Abstract Cited   Shared      Discussed