Study on as-cast microstructure of Fe-15Mn-10Al-5Ni-0.8C low density duplex steel

Zhihe Guo; Fengya Hu; Zhongjun Wang; Kuijun Fu; Weijuan Li; Jiaji Wang

doi:10.1088/2053-1591/ac4ebc

Materials Research Express (Jan 2022)

Study on as-cast microstructure of Fe-15Mn-10Al-5Ni-0.8C low density duplex steel

Zhihe Guo,
Fengya Hu,
Zhongjun Wang,
Kuijun Fu,
Weijuan Li,
Jiaji Wang

Affiliations

Zhihe Guo: School of Materials and Metallurgy, University of Science and Technology Liaoning, Anshan 114051, People’s Republic of China; State Key Laboratory of Metal Material for Marine Equipment and Application, Ansteel Group Corporation, Anshan 114009, People’s Republic of China
Fengya Hu: State Key Laboratory of Metal Material for Marine Equipment and Application, Ansteel Group Corporation, Anshan 114009, People’s Republic of China
Zhongjun Wang: ORCiD; School of Materials and Metallurgy, University of Science and Technology Liaoning, Anshan 114051, People’s Republic of China
Kuijun Fu: State Key Laboratory of Metal Material for Marine Equipment and Application, Ansteel Group Corporation, Anshan 114009, People’s Republic of China
Weijuan Li: School of Materials and Metallurgy, University of Science and Technology Liaoning, Anshan 114051, People’s Republic of China
Jiaji Wang: State Key Laboratory of Metal Material for Marine Equipment and Application, Ansteel Group Corporation, Anshan 114009, People’s Republic of China

DOI: https://doi.org/10.1088/2053-1591/ac4ebc
Journal volume & issue: Vol. 9, no. 2
p. 026512

Abstract

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The microstructure of Fe-15Mn-10Al-5Ni-0.8C low density duplex steel ingots was studied by laser confocal scanning calorimetry , metallographic microscopy and scanning electron microscopy. The results indicated that: the microstructure of Fe-15Mn-10Al-5Ni-0.8C low density steel was mainly composed of coarse austenite dendrites and δ -ferrite phase in dendrite. The δ -ferrite could be completely eliminated by solution treatment. A dynamic model of austenite grain growth was established. Through analysis, it was concluded that the critical temperature for rapid austenite growth was 1250 °C. The activation energy for austenite grain growth was 365 KJ/mol as calculated by Sellars’ model.

Published in Materials Research Express

ISSN: 2053-1591 (Online)
Publisher: IOP Publishing
Country of publisher: United Kingdom
LCC subjects: Technology: Electrical engineering. Electronics. Nuclear engineering: Materials of engineering and construction. Mechanics of materials; Technology: Chemical technology
Website: https://iopscience.iop.org/journal/2053-1591

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