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Atomistic simulation of martensite decay

Lookup NU author(s): Dr Adrian OilaORCiD

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This work is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0).

Abstract

© 2022 The Author(s). Published by IOP Publishing Ltd.Molecular dynamics simulations were used to study the phenomenon of martensite decay in gears by deforming a grinding mark subjected to contact stresses exerted by a rigid plate. The velocities imposed on the rigid plate and the interatomic potential chosen to represent the interactions between the rigid plate and the grinding mark allow for a realistic representation of an elastohydrodynamic contact with an average friction coefficient of 0.05 and all values below 0.1. Due to the initial plastic deformation the height of the grinding mark reduces significantly between two loading cycles, consequently, during the second loading cycle the deformation is predominantly elastic and dislocations only nucleate during the first loading cycle. The diffusion of carbon atoms from the grinding mark leads to the formation of plate-like regions depleted in carbon and precipitation of cementite, the products of martensite decay, as observed experimentally.

Publication metadata

Author(s): Oila A

Publication type: Article

Publication status: Published

Journal: Modelling and Simulation in Materials Science and Engineering

Year: 2022

Volume: 30

Issue: 6

Online publication date: 19/07/2022

Acceptance date: 24/05/2022

Date deposited: 22/09/2022

ISSN (print): 0965-0393

ISSN (electronic): 1361-651X

Publisher: Institute of Physics

URL: https://doi.org/10.1088/1361-651X/ac72bb

DOI: 10.1088/1361-651X/ac72bb

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