Conference Tools for 2020 TMS Annual Meeting & Exhibition

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About this Abstract
Meeting	2020 TMS Annual Meeting & Exhibition
Symposium	Characterization: Structural Descriptors, Data-Intensive Techniques, and Uncertainty Quantification
Presentation Title	Investigating the Atomistic Nature of Grain Boundary Failure
Author(s)	Jacob P. Tavenner, Christopher Weinberger, Shawn Coleman, Garritt Tucker
On-Site Speaker (Planned)	Jacob P. Tavenner
Abstract Scope	Grain Boundaries (GBs) (i.e., the interfaces between misoriented crystalline grains) are a significant factor in determining the microstructural response of a material. Analyzing GB response during critical flaw formation, such as during incipient decohesion, allows for development of key understandings of the propensity of specific boundaries to undergo various failure modes. Although unique decohesion behaviors are identified across the sampled GB set, no clear correlations with commonly used GB metrics exist. Under induced decohesion, GBs vary widely in both their propensity for failure and the underlying fracture mode, indicating that the inhomogeneities specific to individual GBs, which are not captured by current GB descriptor techniques, drive the propensity for the failure of individual boundaries. Since most GB descriptors do not capture atomic information, the problem of transmitting valuable data between these length scales is understandable, as failure modes or mechanisms are driven by critical flaws in the material.
Proceedings Inclusion?	Planned: Supplemental Proceedings volume

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