Modelling the Overaging Kinetics of 18Ni250 Maraging Steel-Reference-Cited by-同舟云学术

Modelling the Overaging Kinetics of 18Ni250 Maraging Steel

Published:2024-01-30 Issue:1 Volume:13 Page:60-71
ISSN:2379-1365
Container-title:Materials Performance and Characterization
language:en
Short-container-title:

Author:

Rohit Benjamin¹²^ORCID,Muktinutalapati Nageswara Rao³^ORCID

Affiliation:

1. Department of Aerospace Engineering, Rashtreeya Vidyalaya College of Engineering 1 , Mysore Rd., Bangalore560059, Karnataka, India , ORCID link for author moved to before name tags https://orcid.org/0000-0003-4383-3638

2. School of Mechanical Engineering, Vellore Institute of Technology 2 , Tiruvalam Rd., Katpadi, Vellore, Tamil Nadu632014, India

3. School of Mechanical Engineering, Vellore Institute of Technology 3 , Tiruvalam Rd., Katpadi, Vellore, Tamil Nadu632014, India (Corresponding author), e-mail: muktinutala@gmail.com , ORCID link for author moved to before name tags https://orcid.org/0000-0002-1349-1318

Abstract

Abstract The kinetics of overaging in 18Ni250 maraging steel was studied by (i) modelling the overaging softening behavior, (ii) an aging parameter approach, and (iii) modelling the kinetics of austenite reversion. Changes in kinetics of 18Ni250 maraging steel is calculated as a function of volume fraction of reverted austenite. Softening behavior during overaging was modelled by the Wilson model and the Pardal et al. model. Both the models were found to be in good agreement with experimental data, but the Pardal et al. model showed a better fit. An S-type curve had a better fit compared to a linear fit while relating hardness to the aging parameter with a material constant of C = 20. The kinetics of austenite reversion was studied using the JMAK model, and the activation energy for the austenite reversion process was estimated as 218 kJ/mol.

Publisher

ASTM International

Link

https://asmedigitalcollection.asme.org/materialsperformance/article-pdf/13/1/60/7356135/10_1520_mpc20230053.pdf

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