Title: The austenitic peak stress model of low alloy steel at elevated temperature based on the valence electron theory
Authors: Xu-dong Zhou; Xiang-ru Liu; Zheng-yang Chen
Addresses: School of Materials Science and Engineering, Henan University of Science and Technology, Luoyang, Henan Province 471023, China ' School of Physics and Engineering, Henan University of Science and Technology, Luoyang, Henan Province 471023, China ' School of Materials Science and Engineering, Henan University of Science and Technology, Luoyang, Henan Province 471023, China
Abstract: The traditional method of calculating the high-temperature austenite peak stress empirical model proposed by Sellars and McTegart has been used for 50 years. A new method based on the valence electron theory is presented in three steps. The first step is to calculate the austenitic valence electron parameters and their statistical values at high temperature. The second one is to calculate the binding energy and total binding energy based on the valence electron statistic parameters. The total binding energy is defined as the sum of the mole fractions of the constituent elements in low alloy steel and the corresponding binding energy. The last step is to establish the model of austenitic peak stress at elevated-temperature based on the combination of Hall-Petch formula and Misaka formula as well as the total binding energy. The prediction results show that the austenitic peak stress model presented in this paper has good precision.
Keywords: computational materials; valence electron theory; binding energy; total binding energy; austenite; peak stress.
International Journal of Computational Materials Science and Surface Engineering, 2018 Vol.7 No.3/4, pp.193 - 204
Received: 22 Dec 2016
Accepted: 11 Aug 2017
Published online: 28 Sep 2018 *