Microstructure, texture and mechanical properties in a low carbon steel after ultrafast heating

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING

卷:672

Article

Castro Cerda, F.^1,2  Goulas, C.^3,4  Sabirov, I.⁵  Papaefthymiou, S.⁶  Monsalve, A.²  Petrov, R. H.^1,3 

[1] Univ Ghent, Dept Mat Sci & Engn, Technol Pk 903, B-9052 Ghent, Belgium

[2] Univ Santiago Chile, Dept Met Engn, Av Lib Bdo OHiggins,3363 Estn Cent, Santiago, Chile

[3] Delft Univ Technol, Dept Mat Sci & Engn, Mekelweg 2, NL-2628 CD Delft, Netherlands

[4] Mat Innovat Inst M2i, Elect Weg 25, NL-2628 XD Delft, Netherlands

[5] IMDEA Mat Inst, Calle Eric Kandel 2, Madrid 28906, Spain

[6] Natl Tech Univ Athens, Sch Min & Met Engn, Div Met & Mat, Lab Phys Met, 9 Her Polytech Str, GR-15780 Athens, Greece

关键词: Ultrafast heating;    Steel;    Microstructure;    Texture;    Grain size;    Mechanical properties;   

DOI  :  10.1016/j.msea.2016.06.056

来源: Elsevier

【 摘 要 】

Heating experiments in a wide range of heating rates from 10 degrees C/s to 1200 degrees C/s and subsequent quenching without isothermal soaking have been carried out on a low carbon steel. The thermal cycles were run on two different cold rolled microstructures, namely ferrite+pearlite and ferrite+martensite. It is shown that the average ferritic grain size, the ferrite grain size distribution, the phase volume fractions and the corresponding mechanical properties (ultimate tensile strength and ductility) after quenching are strongly influenced by the heating rates and the initial microstructure. The ferrite grain size distribution is significantly modified by the heating rate, showing a markedly bimodal distribution after fast annealing. The rise of the heating rate has produced a change in the relative intensities of texture components, favouring those of the cold-deformed structure (RD fibre) over the recrystallization components (ND fibre). (C) 2016 Elsevier B.V. All rights reserved.

【 授权许可】

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