Kinetics of the austenitization in the Fe-Mo-C ternary alloys during continuous heating

Kong Lingnan; Liu Yaohui; Liu Jia’an; Song Yulai; Li Shasha; Liang Yan; Zheng Yi; Cui Wei

doi:10.1515/phys-2016-0078

Open Physics (Jan 2016)

Kinetics of the austenitization in the Fe-Mo-C ternary alloys during continuous heating

Kong Lingnan,
Liu Yaohui,
Liu Jia’an,
Song Yulai,
Li Shasha,
Liang Yan,
Zheng Yi,
Cui Wei

Affiliations

Kong Lingnan: Key Laboratory of Automobile Materials of Ministry of Education & School of Materials Science and Engineering, Nanling Campus, Jilin University, No. 5988 Renmin Street, Changchun 130025, PR China
Liu Yaohui: Key Laboratory of Automobile Materials of Ministry of Education & School of Materials Science and Engineering, Nanling Campus, Jilin University, No. 5988 Renmin Street, Changchun 130025, PR China
Liu Jia’an: Key Laboratory of Automobile Materials of Ministry of Education & School of Materials Science and Engineering, Nanling Campus, Jilin University, No. 5988 Renmin Street, Changchun 130025, PR China
Song Yulai: Key Laboratory of Automobile Materials of Ministry of Education & School of Materials Science and Engineering, Nanling Campus, Jilin University, No. 5988 Renmin Street, Changchun 130025, PR China
Li Shasha: Key Laboratory of Automobile Materials of Ministry of Education & School of Materials Science and Engineering, Nanling Campus, Jilin University, No. 5988 Renmin Street, Changchun 130025, PR China
Liang Yan: Key Laboratory of Automobile Materials of Ministry of Education & School of Materials Science and Engineering, Nanling Campus, Jilin University, No. 5988 Renmin Street, Changchun 130025, PR China
Zheng Yi: Key Laboratory of Automobile Materials of Ministry of Education & School of Materials Science and Engineering, Nanling Campus, Jilin University, No. 5988 Renmin Street, Changchun 130025, PR China
Cui Wei: Key Laboratory of Automobile Materials of Ministry of Education & School of Materials Science and Engineering, Nanling Campus, Jilin University, No. 5988 Renmin Street, Changchun 130025, PR China

DOI: https://doi.org/10.1515/phys-2016-0078
Journal volume & issue: Vol. 14, no. 1
pp. 695 – 702

Abstract

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The influence of molybdenum on the microstructure and kinetics of the austenization of the Fe-Mo-C ternary alloys is analyzed using differential scanning calorimetry (DSC) and the Johnson-Mehl-Avrami-Kolmogorov model (JMAK) in the temperature range from 293 K to 1373 K. The as-cast microstructure and microstructure after DSC test are obtained using optical microscopy (OM) and scanning electron microscopy (SEM). It was seen that with an increasing Mo concentration, the lamellar pearlite is spherized and the austenite grain size decreases. In addition, both DSC curves and the JMAK model show that the initial (Ac1) and the final (Ac3) temperature of the phase transition increases with an increasing Mo concentration. It was also seen that increasing the Mo concentration, the diffusion activation energy (DAE) increases and the pre-exponential factor of diffusion (DPEF) decreases due to a change in both the austenitic nucleation rate and the diffusion of the elements caused by the introduction of Mo.

Published in Open Physics

ISSN: 2391-5471 (Online)
Publisher: De Gruyter
Country of publisher: Poland
LCC subjects: Science: Physics
Website: https://www.degruyter.com/journal/key/phys/html

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