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Microstructure evolution of Mg-Zn-Zr magnesium alloy against soft steel core projectile

Journal of Materials Science & Technology 2021年第20期79卷 46-61页

作者： Abdul Malik Yangwei Wang Huanwu Cheng Faisal Nazeer Muhammad Abubaker Khan School of Material Science and Engineering Beijing Institute of TechnologyBeijing 100081China National Key Laboratory of Science and Technology on Materials under Shock and Impact Beijing 100081China

The study aimed to shed light on the post deformation and damage behavior of an extruded Mg-Zn-Zr alloy under a ballistic *** results revealed that the initial microstructure consisted of both{0001}basal and{1010}prismatic fiber *** impact,adiabatic shear bands,pronounce different twinning in big grains,,,andtypes of dislocations,and grain refinement through twinning induce recrystallization accommodated the strain,and absorbed∼65.7%of the energy during impact carried by a soft steel ***,the deformation behavior at the top broad sides of the crater was entirely *** weak basal texture was changed to a strong prismatic texture,which was further proved by typical sigmoidal compressive stress-strain curves.A revised model for the development of the ultra-fine grains adjacent to the crater has been *** microhardness and yield strength was∼33%and∼40%higher and chiefly ascribed to strain hardening in ultra-fine grained near the surface of the perforation *** exit of the perforation path was severely damaged and forms onion-shaped concentric rings which were comprised of melted zones,dimples,and *** on the all interesting findings,this study can be a clue for the development of the lightweight Mg alloy for military and aerospace applications.

关键词： Mg alloy soft steel core Ballistic impact Texture Twin induce rotational dynamic recrystallization CDRX

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