Microstructure, properties and hot workability of M300 grade maraging steel

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 p...

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Bibliographic Details
Published in:Defence technology 2018-02, Vol.14 (1), p.51-58
Main Authors: Chakravarthi, K.V.A., Koundinya, N.T.B.N., Narayana Murty, S.V.S., Nageswara Rao, B.
Format: Article
Language:English
Subjects:
Activation energy
Constitutive relation
Hot deformation
M300 grade maraging steel
Processing map
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Summary: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.
ISSN:2214-9147
2214-9147
DOI:10.1016/j.dt.2017.09.001