In-situ TEM observations on interaction of basal <a> dislocations and β′ phases in a Mg–Gd binary alloy
Mengning Xu, Na Li, Xuechao Sha, Yi Liu, Bo Gao, Lirong Xiao, Xuefei Chen, Hao Zhou
Abstract
Here we report in-situ TEM observations on interaction between dislocations and β′ phases in aged Mg–Gd alloys. The slipping <a> dislocations squash into the interface and bow out to bypass the β′ phase, leading to a zigzag route of plastic flow. Orowan mechanism is determined as the main strengthen mechanism.
Topics & Concepts
Materials scienceAlloySlippingZigzagIn situCrystallographyDislocationCondensed matter physicsMetallurgyComposite materialChemistryGeometryPhysicsMathematicsOrganic chemistryMagnesium Alloys: Properties and ApplicationsAluminum Alloy Microstructure PropertiesMicrostructure and mechanical properties