期刊
MODELLING AND SIMULATION IN MATERIALS SCIENCE AND ENGINEERING
卷 23, 期 3, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/0965-0393/23/3/035006
关键词
micromechanics; nf-HEDM; crystal plasticity; LSHR; microcrack nucleation; nickel-based superalloy; finite-element method
资金
- Air Force Office of Scientific Research [FA9550-10-1-0213]
- National Science Foundation
- Ross-Tetelman Fellowship at Cornell University
- DOE/BES [DESC0002001]
- US Department of Energy, Office of Science, Office of Basic Energy Sciences [DE-AC02-06CH11357]
A microstructure-based capability for forecasting microcrack nucleation in the nickel-based superalloy LSHR is proposed, implemented, and partially verified. Specifically, gradient crystal plasticity is applied to finite-element models of the experimentally measured, 3D microstructure wherein a microcrack is known to have nucleated along a coherent Sigma 3 boundary. The framework is used to analyze this particular nucleation event and conduct an extensive grain boundary analysis study, the results of which underpin the importance that elastic anisotropy and coherency have in the localization of plastic slip.
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