Effect of post carburizing treatments on residual stress distribution in plain carbon and alloy steels – A numerical analysis

Hiremath, Pavan and Sharma, S S and Gowri Shankar, M C and Shettar, Manjunath and Gurumurthy, B M (2020) Effect of post carburizing treatments on residual stress distribution in plain carbon and alloy steels – A numerical analysis. Journal of Materials Research and Technology, 9 (20). pp. 8439-8450. ISSN 2238-7854

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Abstract

This work focuses on finding the residual stress distribution in post carburized steels. Initially, three different steel specimens (EN 3, 20MnCr5 and EN 353) were carburized with gas carburizing technique. For post carburizing treatment, one set of the samples was air-cooled (normalizing treatment) and others were quenched in water (hardening treatment). Scanning electron microscope (SEM) was used to study the microstructure of post carburized steels. The normalized steels displayed pearlite and bainite structures and hardened steels displayed low and high carbon martensite along with retained austenite. In few samples, the residual stresses were measured with the X-ray stress analyzer. A Finite Element Analysis (FEA) model was established using the varied material properties and thermophysical parameters of different steels. Later the measured and experimental data from the FEA were compared, there were in a good fit and the FEA model was validated. It was observed that the residual stress in normalized and hardened steels were dependent on the carbon gradient as well as the temperature difference from the core (center) to the case (surface) of the steels. The formation of martensite and retained austenite in the hardened steels led them to attain high magnitude stresses than normalized steels

Item Type: Article
Uncontrolled Keywords: Carburization Normalizing Hardening Residual stress Finite element analysis
Subjects: Engineering > MIT Manipal > Mechanical and Manufacturing
Depositing User: MIT Library
Date Deposited: 25 Sep 2020 07:01
Last Modified: 25 Sep 2020 07:01
URI: http://eprints.manipal.edu/id/eprint/155674

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