Atomic simulations of twist grain boundary structures and deformation behaviors in aluminum
Source abstract
Abstract
The structures and behaviors of grain boundaries (GBs) have profound effects on the mechanical properties of polycrystalline materials. In this paper, twist GBs in aluminum were investigated with molecular dynamic simulations to reveal their atomic structures, energy and interactions with dislocations. One hundred twenty-six twist GBs were studied, and the energy of all these twist GBs were calculated. The result indicates that <001> and <111> twist GBs have lower energy than <101> twist GBs because of their higher interplanar spacing. In addition, 12 types of <001> twist GBs in aluminum were chosen to explore the deformation behaviors. Low angle twist GBs with high density of network structures can resist greater tension because mutually hindering behaviors between partial dislocations increase the twist GB strength.
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Research context
OpenAlex topics: Microstructure and mechanical properties · Aluminum Alloy Microstructure Properties · Aluminum Alloys Composites Properties
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
University of North Texas Department of Materials Science and Engineering, , Denton, Texas 76203, USA
Funding
National Science Foundation
References (30)
Show source-provided references
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