Journal article
Solute-induced solid-solution softening and hardening in bcc tungsten
Acta materialia, v 141, pp 304-316
01 Dec 2017
Abstract
The solute-induced softening and hardening effects in bcc W for twenty-one substitutional alloying elements (Al, Co, Cr, Fe, Hf, Ir, Mn, Mo, Nb, Ni, Os, Pd, Pt, Re, Rh, Ru, Ta, Tc, Ti, V and Zr) are examined to search for a similar softening effect as that observed with Re. The changes in energy barriers of dislocation motion caused by solute-dislocation interactions are directly computed via a first-principles approach with flexible boundary conditions. The effect of solutes on the critical resolved shear stress of the 1/2 screw dislocation in bcc W at room temperature is quantitatively predicted, as a function of alloy concentration, via a mesoscopic solid-solution model using the first-principles results as input. Al and Mn are proposed to be promising substitutes for Re as these two elements introduce similar softening effects as Re in bcc W. In addition, the trends of the solute-dislocation interactions, and their correlations to the dislocation core structure geometries are discussed. (c) 2017 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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Details
- Title
- Solute-induced solid-solution softening and hardening in bcc tungsten
- Creators
- Yong-Jie Hu - Pennsylvania State UniversityMichael R. Fellinger - University of Illinois Urbana-ChampaignBrady G. Bulter - US Army, Res Lab, Weap & Mat Res Directorate, RDRL-WMM-F,Aberdeen Proving Ground, Aberdeen Proving Ground, MD 21005 USAYi Wang - Pennsylvania State UniversityKristopher A. Darling - DEVCOM Army Research LaboratoryLaszlo J. Kecskes - DEVCOM Army Research LaboratoryDallas R. Trinkle - University of Illinois Urbana-ChampaignZi-Kui Liu - Pennsylvania State University
- Publication Details
- Acta materialia, v 141, pp 304-316
- Publisher
- Elsevier
- Number of pages
- 13
- Grant note
- W911NF-08-2-0084 / U.S. Army Research Laboratory; United States Department of Defense; US Army Research Laboratory (ARL) ACI-1053575 / National Science Foundation; National Science Foundation (NSF) Materials Simulation Center Institute for CyberScience
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Materials Science and Engineering
- Web of Science ID
- WOS:000415768100030
- Scopus ID
- 2-s2.0-85029787841
- Other Identifier
- 991021931772204721
InCites Highlights
Data related to this publication, from InCites Benchmarking & Analytics tool:
- Collaboration types
- Domestic collaboration
- Web of Science research areas
- Materials Science, Multidisciplinary
- Metallurgy & Metallurgical Engineering