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Indexed by:期刊论文

Date of Publication:2017-04-01

Journal:NUCLEAR ENGINEERING AND TECHNOLOGY

Included Journals:SCIE

Volume:49

Issue:3

Page Number:569-575

ISSN No.:1738-5733

Key Words:High Temperature; Irradiation; Multiscale Simulation; Yield Strength

Abstract:One of the important requirements for the application of reduced-activation ferritic/martensitic (RAFM) steel is to retain proper mechanical properties under irradiation and high-temperature conditions. To simulate the yield strength and stress-strain curve of steels during high-temperature and irradiation conditions, a multiscale simulation method consisting of both microstructure and strengthening simulations was established. The simulation results of microstructure parameters were added to a superposition strengthening model, which consisted of constitutive models of different strengthening methods. Based on the simulation results, the strength contribution for different strengthening methods at both room temperature and high-temperature conditions was analyzed. The simulation results of the yield strength in irradiation and high-temperature conditions were mainly consistent with the experimental results. The optimal application field of this multiscale model was 9Cr series (7-9 wt.%Cr) RAFM steels in a condition characterized by 0.1-5 dpa (or 0 dpa) and a temperature range of 25-500 degrees C. Copyright (C) 2016, Published by Elsevier Korea LLC on behalf of Korean Nuclear Society.