Abstract
A method for classifying grain stress evolution behaviors using unsupervised learning techniques is presented. The method is applied to analyze grain stress histories measured in situ using high-energy x-ray diffraction microscopy from the aluminum–lithium alloy Al-Li 2099 at the elastic–plastic transition (yield). The unsupervised learning process automatically classified the grain stress histories into four groups: major softening, no work-hardening or -softening, moderate work-hardening, and major work-hardening. The orientation and spatial dependence of these four groups are discussed. In addition, the generality of the classification process to other samples is explored.
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This work is based upon research conducted at the Cornell High Energy Synchrotron Source (CHESS) which is supported by the National Science Foundation under Award DMR-1332208.
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Pagan, D.C., Kaminsky, J., Tayon, W.A. et al. Automated Grain Yield Behavior Classification. JOM 71, 3513–3520 (2019). https://doi.org/10.1007/s11837-019-03706-2
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DOI: https://doi.org/10.1007/s11837-019-03706-2