Slip transfer,slip blocking and slip-to-twin transfer at grain boundaries in a WE43 Mg alloyOA
Slip transfer/blocking at grain boundaries was studied in a WE43 Mg alloy through a combined experimental approach involving electron backscatter diffraction(EBSD),slip trace modified lattice rotation analysis(ST-MLRA),and diffraction contrast tomography(DCT).Slip(basal slip)transfer occurred exclusively across low-angle grain boundaries(<20°),while slip blocking was dominant(80.4%),and slip to twin transfer typically occurred at higher misorientation angles.Among the geometric descriptors analyzed,low values ofκ(angle between slip directions),ψ(angle between slip plane normals),andθ(angle between the traces of the incoming and outgoing slip planes with the GB plane)were consistently associated with the slip transfer cases.Notably,slip transfer events were tightly gathered in the high-compatibility region where both the Luster-Morris parameter(m)and the LRB factor exceeded 0.9,suggesting that both serve as robust criteria for basal slip transmission across grain boundaries.The integration of 3D grain morphology with actual slip system identification provides a comprehensive framework for evaluating intergranular deformation in Mg alloys.
Yidi Li;Biaobiao Yang;Yunping Li;Javier LLorca
State Key Lab for Powder Metallurgy,Central South University,Changsha 410083,China IMDEA Materials Institute,C/Eric Kandel 2,Getafe,28906 Madrid,Spain Department of Materials Science,Polytechnic University of Madrid/Universidad Politécnica de Madrid,E.T.S.de Ingenieros de Caminos,28040 Madrid,SpainIMDEA Materials Institute,C/Eric Kandel 2,Getafe,28906 Madrid,Spain Department of Materials Science,Polytechnic University of Madrid/Universidad Politécnica de Madrid,E.T.S.de Ingenieros de Caminos,28040 Madrid,SpainState Key Lab for Powder Metallurgy,Central South University,Changsha 410083,ChinaIMDEA Materials Institute,C/Eric Kandel 2,Getafe,28906 Madrid,Spain Department of Materials Science,Polytechnic University of Madrid/Universidad Politécnica de Madrid,E.T.S.de Ingenieros de Caminos,28040 Madrid,Spain
矿业与冶金
Slip transferMagnesiumGrain boundaryDiffraction contrast tomographyGeometric descriptor
《Journal of Magnesium and Alloys》 2026 (6)
P.368-379,12
supported by the project(MAD2DCM)-IMDEA Materials funded by Comunidad de Madrid and by the Recovery,Transformation and Resilience Plan and by NextGenerationEU from the European Union.
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