Journal
SCRIPTA MATERIALIA
Volume 120, Issue -, Pages 31-36Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2016.04.003
Keywords
Bonding charge density; Electron work function; Solid-solution hardening; Grain refinement strengthening
Categories
Funding
- United States National Science Foundation (NSF) [DMR-1006557]
- U.S. Army Research Laboratory [W911NF-08-2-0084]
- National Natural Science Foundation of China [50871013, 51271018]
- Project Based Personnel Exchange Program
- American Academic Exchange Service
- China Scholarship Council [[2008]3072]
- Materials Simulation Center
- Institute for CyberScience
- NSF [OCI-0821527]
- XSEDE clusters - NSF [ACI-1053575]
- Division Of Materials Research
- Direct For Mathematical & Physical Scien [1006557] Funding Source: National Science Foundation
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In this work, the effects of Mn on lattice parameter, electron work function (EWF), bonding charge density, and hardness of nanocrystalline Al-Mn non-equilibrium solid solutions are investigated. We show how the enhancement of the EWF contributes to the observed improvement of the hardness of Al-Mn solid solutions. It is understood that the physical mechanisms responsible in our model, using the EWF coupled with a power law scaled hardness, are attributed to the redistribution of electrons caused by the presence of Mn solute atoms, supporting an atomic and electronic basis for the coupling of solid solution and grain refinement strengthening mechanisms. (C) 2016 Elsevier Ltd. All rights reserved.
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