Acta Metall Sin  1994, Vol. 30 Issue (7): 289-295    DOI:

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A TEM STUDY OF SPINODAL DECOMPOSITION IN Fe-1 .83C MARTENSITE

REN Xiaobing; WANG Xiaotian (Xi'an Jiaotong University) SHIMIZU Ken'ichi(Kanazawa institute of Technology; Japan) TADAKI Tsugio (Osaka University;Japan)(Manuscript received 27 October; 1993; in revised form 4 January; 1994)

REN Xiaobing; WANG Xiaotian (Xi'an Jiaotong University) SHIMIZU Ken'ichi(Kanazawa institute of Technology; Japan) TADAKI Tsugio (Osaka University;Japan)(Manuscript received 27 October; 1993; in revised form 4 January; 1994). A TEM STUDY OF SPINODAL DECOMPOSITION IN Fe-1 .83C MARTENSITE. Acta Metall Sin, 1994, 30(7): 289-295.

Abstract References Related Articles Recommended Metrics Download:  PDF(562KB)  Export:  BibTeX | EndNote (RIS)       Abstract  Diffuse scattering and microstructure of Fe-1.83C(%) martensite aged at room temperature was studied by TEM. The intensity distribution of diffuse scattering in reciprocal space was determined by double-tilt technique. The results show that the shape of martensite diffraction spot becomes a diffuse spike after aging, and its 3-dimensional profile appears to be two head-on 4-sided regular pyramids. Fourier analysis of the diffuse scattering suggests that martensite undergoes a spinodal decomposition during aging,the tweed-like modulated structure is composed of a dominant wave with wavelength of about 1 nm and non-dominant waves with longer wavelengths. For the first time it is found that the modulated structure of Fe-C martensite does not grow even after aged for several months.The reason is considered to be due to the strong elastic interactions among carbon-enriched and depleted regions.Correspondent: REN Hiaobing, Presently with Department of Physics, Nanjing, University, Nanjing 21008) Key words:  Fe-C martensite      aging      spinodal decomposition      diffuse scattering      Received:  18 July 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/I7/289 1OlsonGB,CohenM．MetallTrans,1983;14A:10572NagakuraS,HirotsuY,KusunokiM,NakamuraY．MetallTrans,1983;14A:10253KusunokiM,NagakuraS．JApplCrystallogr,198l:14:3294TaylorKA,ChangL,OlsonGB,SmithGDW,CohenM,VanderSandeJB．MetallTrans,1989;20A:27175UwakwehONC,GeninJMRR,SilvainJG．MetallTrans,1991;22A:7976KhachaturyanAG．TheoryofStructuralTransformationsinSolide．JohnWiley&Sons,19837CahnJW．ActaMetall,1961;9:5258CahnJW．ActaMetall．1961;9:7959RenSB,WangST．MetallTrans,1988;19A:242710任晓兵,王笑天．金属热处理学报,1990;11:2811KhachaturyanAG,OnishimovaTA．PhysMetMetallogr,1968;26:1212LangerJS,Bar-onM,MillerHD．PhysRev,1975:A11:141713MiyazakiT,DoiM．MaterSciEng,1989;A110:17514KawasakiK,EnomotoY．Physica,1988;A150:46 [1] ZHANG Leilei, CHEN Jingyang, TANG Xin, XIAO Chengbo, ZHANG Mingjun, YANG Qing. 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