Effect of molybdenum on recrystallization behavior of Fe30Mn5Al1C- x Mo lightweight austenitic steels

Korla, Rajesh (2023) Effect of molybdenum on recrystallization behavior of Fe30Mn5Al1C- x Mo lightweight austenitic steels. Scripta Materialia, 230. p. 115399. ISSN 1359-6462

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Abstract

Lightweight austenitic steels are among the materials of interest which can potentially reduce the CO2 emissions and improve the fuel efficiency in automotive sector. Understanding the recrystallization behavior of these steels would open the door for a spectrum of structural applications that need a strength-ductility balance. In the present work, the recrystallization behavior of cold rolled Fe-30Mn-5Al-1C- (0–3 wt%) Mo austenitic steels after annealing at 600–1200 °C was investigated through EBSD, FESEM, TEM and hardness. The solubility of molybdenum in austenite and the equilibrium phases is determined through thermodynamic calculations. Alloying with more than 0.5 wt% Mo increased the recrystallization temperature by ∼ 100 °C. M2C type carbides precipitated in 2-Mo and 3-Mo alloys leading to grain refinement and delay in recrystallization. The hardness increased with increase in Mo content and decreased with increase in annealing temperature. At 1200 °C, due to grain growth all the alloys have similar grain size and hardness.

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IITH Creators:

IITH Creators	ORCiD
Korla, Rajesh	UNSPECIFIED

Item Type:

Article

Uncontrolled Keywords:

Electron back scatter diffraction (EBSD); Lightweight austenitic steels; Micro-indentation; Static recrystallization; Aluminum alloys; Austenite; Automotive industry; Carbides; Cold rolling; Grain growth; Grain refinement; Grain size and shape; Hardness; Manganese alloys; Manganese steel; Metal cladding; Recrystallization (metallurgy); Steel sheet; Automotive sector; CO 2 emission; Electron back scatter diffraction; Electron backscatter diffraction; Fuel efficiency; Lightweight austenitic steel; Micro indentation; Recrystallisation; Static recrystallization; Austenitic stainless steel

Subjects:

Others > Metallurgy Metallurgical Engineering
Chemistry

Divisions:

Department of Material Science Engineering

Depositing User:

Mr Nigam Prasad Bisoyi

Date Deposited:

04 Jan 2024 14:29

Last Modified:

04 Jan 2024 14:29

URI:

http://raiithold.iith.ac.in/id/eprint/11768