The effect of hot-mounting on the microstructure of an as-quenched auto-tempered low-carbon martensitic steel
|Author:||Babu, Shashank Ramesh1; Jaskari, Matias2; Järvenpää, Antti2;|
1Materials and Mechanical Engineering, Centre for Advanced Steels Research, University of Oulu, 90014 Oulun yliopisto, Finland
2Kerttu Saalasti Institute, University of Oulu, Pajatie 5, FI-85500 Nivala, Finland
|Online Access:||PDF Full Text (PDF, 2.3 MB)|
|Persistent link:|| http://urn.fi/urn:nbn:fi-fe2019052817606
Multidisciplinary Digital Publishing Institute,
|Publish Date:|| 2019-05-28
The effect of hot-mounting for metallographic studies of as-quenched low-carbon martensitic steels has been studied. Hot-mounting is typically carried out at 150–200 °C, i.e., a low-temperature tempering regime. Cold- and hot-mounted specimens from an as-quenched low-carbon auto-tempered steel were examined using a scanning electron microscope and their hardness levels were also compared. It was found that hot-mounting causes additional tempering that manifests as the appearance of new precipitates in those regions that are free of auto-tempered cementite. The observations were rationalized using DICTRA simulations to calculate the potential growth of cementite. Hot-mounting was also shown to cause a small but statistically significant increase in the hardness of the martensite.
|Type of Publication:||
A1 Journal article – refereed
|Field of Science:||
216 Materials engineering
The authors are grateful for financial support from the European Commission under grant number 675715-MIMESIS-H2020-MSCA-ITN-2015, which is a part of the Marie Sklodowska-Curie Innovative Training Networks European Industrial Doctorate Programme.
|EU Grant Number:||
(675715) MIMESIS - Mathematics and Materials Science for Steel Production and Manufacturing
© 2019 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).