Reducing model bias in a deep learning classifier using domain adversarial neural networks in the MINER v A experiment

Perdue, G.N.; Ghosh, A.; Wospakrik, M.; Akbar, F.; Andrade, D.A.; Ascencio, M.; Bellantoni, L.; Bercellie, A.; Betancourt, M.; Vera, G. F.; Cai, T.; Carneiro, M.F.; Chaves, J.; Coplowe, D.; Motta, H. da; Díaz, G.A.; Felix, J.; Fields, L.; Fine, R.; Gago, A. M.; Galindo, R.; Golan, T.; Gran, R.; Han, J. Y.; Harris, D. A.; Jena, D.; Kleykamp, J.; Kordosky, M.; Lu, X.-G.; Maher, E.; Mann, W. A.; Marshall, C. M.; McFarland, K.S.; McGowan, A. M.; Messerly, B.; Miller, J.; Nelson, J. K.; Nguyen, C.; Norrick, A.; Nuruzzaman, Nuruzzaman; Olivier, A.; Patton, R.; Ramírez, M.A.; Ransome, R. D.; Ray, H.; Ren, L.; Rimal, D.; Ruterbories, D.; Schellman, H.; Salinas, C. J.; Su, H.; Upadhyay, S.; Valencia, E.; Wolcott, J.; Yaeggy, B.; Young, S.

doi:10.1088/1748-0221/13/11/P11020

Recent molecular dynamics simulations revealed that 〈 c + a 〉 dislocations in Mg were prone to dissociation on the basal plane, thus becoming sessile. Basal dissociation of 〈 c + a 〉 dislocations is significant because it is a major factor in the limited ductility and high work-hardening in Mg. We report an in situ transmission electron microscopy study of the deformation process using an H-bar-shaped thin foil of Mg single crystal designed to facilitate 〈 c + a 〉 slip, observe 〈 c + a 〉 dislocation activity, and establish the validity of the largely immobile 〈 c + a 〉 dislocations caused by the predicted basal dissociation. In addition, through detailed observations on the fine movement of some 〈 c + a 〉 dislocations, it was revealed that limited bowing out movement for some non-basal portions of 〈 c + a 〉 dislocations was possible; under certain circumstances, i.e., through attraction and reaction between two 〈 c + a 〉 dislocations on the same pyramidal plane, at least portions of the sessile configuration were observed to be reversed into a glissile one.

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