Fracture Characteristic of a Mg-Gd-Y Alloy Compressed at High Strain Rate and Sub-Zero Temperature

Qing Yu Hou; Jing Tao Wang; Zhen Yi Huang

doi:10.4028/www.scientific.net/AMR.476-478.38

Paper Titles

Effect of the Grain Size on Electrochemical Corrosion Behavior of Cu₆₀Ni₂₀Cr₂₀ Alloys in Solutions Containing Chloride Ions
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Preparation of Spherical Nanometer ZrO₂ Reunion Powders via Single Emulsion Assisted with Homogeneous Precipitation
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The Preparation of Rapidly Solidified and Powder Metallurgy AZ91 Alloy
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Research on Forming Process of Anodic Oxide Film of AZ91D Magnesium Alloy
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Fracture Characteristic of a Mg-Gd-Y Alloy Compressed at High Strain Rate and Sub-Zero Temperature
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Effect of Aging Condition on the Mechanical Properties of an Al-Cu-Mg-Ag Alloy
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Effects of Hot Deformation Process on the Microstructure and Hardness of AZ80 Magnesium Alloy
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Development and Application of a New Carburant Material
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Influence of Annealing Treatment on Precipitation of β-Mg₁₇Al₁₂ Phase of AZ80 Magnesium Alloy
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Fracture Characteristic of a Mg-Gd-Y Alloy Compressed at High Strain Rate and Sub-Zero Temperature

Abstract:

In this paper, an as-extruded Mg-10Gd-2Y-0.5Zr alloy was compressed at 3265 s^-1 and -20 °C using a split Hopkinson pressure bar (SHPB) machine. Details about the initial texture and the lattice parameters of the as-extruded alloy were obtained by pole figures combined by orientation distribution function (ODF) and X-ray diffraction (XRD) Rietveld refinement method, respectively. It can be obtained that the maximum average orientation factor being 0.297 can be obtained at 45^o angled to the extruded direction that is the force axis, resulting in the fracture of the impact compressed sample along a plane orientated at an angle of ~45^o to the compression axis. Analysis of the fracture reveals that the fracture forms near the periphery of one face of the specimen and then penetrates into the bulk material subsequently meet near the other face. Even though the local shear deformation exists in the compressed sample, the fracture of the as-extruded Mg-10Gd-2Y-0.5Zr alloy compressed at 3265 s^-1 and -20 °C is not caused by forming the adiabatic shear band (ASB).