Microstructure, properties and hot workability of M300 grade maraging steel

K.V.A. Chakravarthi; N.T.B.N. Koundinya; S.V.S. Narayana Murty; B. Nageswara Rao

doi:10.1016/j.dt.2017.09.001

Defence Technology (Feb 2018)

Microstructure, properties and hot workability of M300 grade maraging steel

K.V.A. Chakravarthi,
N.T.B.N. Koundinya,
S.V.S. Narayana Murty,
B. Nageswara Rao

Affiliations

K.V.A. Chakravarthi: Materials and Mechanical Entity, Vikram Sarabhai Space Centre, Trivandrum 695 022, India
N.T.B.N. Koundinya: Department of Metallurgical Engineering and Materials Science, Indian Institute of Technology, Madras, Chennai 600 036, India
S.V.S. Narayana Murty: Materials and Mechanical Entity, Vikram Sarabhai Space Centre, Trivandrum 695 022, India
B. Nageswara Rao: Department of Mechanical Engineering, K L University, Green Fields, Vaddeswaram, Guntur 522 502, India

DOI: https://doi.org/10.1016/j.dt.2017.09.001
Journal volume & issue: Vol. 14, no. 1
pp. 51 – 58

Abstract

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This paper presents isothermal uniaxial compression test results of M300 grade maraging steel over a wide range of temperatures (900–1200 °C) and strain rates (0.001–100s−1) to examine hot deformability and concurrent microstructural evolution. Processing map is generated and indicated the optimum processing parameters in the temperature range of 1125°-1200 °C and strain rate range of 0.001–0.1 s−1. High values of the efficiency of power dissipation, microstructural observations and EBSD results indicate softening mechanism to be the occurrence of dynamic recrystallisation. Material constants in a constitutive relation are evaluated from the flow stress data useful in computer modelling.

Published in Defence Technology

ISSN: 2214-9147 (Online)
Publisher: KeAi Communications Co., Ltd.
Country of publisher: China
LCC subjects: Military Science
Website: https://www.keaipublishing.com/en/journals/defence-technology/

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