The High-Strain-Rate Constitutive Behavior and Shear Response of Pure Magnesium and AZ31B Magnesium Alloy

被引：13

作者：

Cerreta, E. K. ^{[1
]}

Fensin, S. J. ^{[1
]}

Perez-Bergquist, S. J. ^{[1
]}

Trujillo, C. P. ^{[1
]}

Morrow, B. M. ^{[1
]}

Lopez, M. F. ^{[1
]}

Roach, C. J. ^{[2
,3
]}

Mathaudhu, S. N. ^{[2
,3
]}

Anghel, V ^{[1
]}

Gray, G. T., III ^{[1
]}

机构：

[1] Los Alamos Natl Lab, MST 8, Los Alamos, NM 87545 USA

[2] Univ Calif Riverside, Mech Engn Dept, Riverside, CA 92521 USA

[3] Univ Calif Riverside, Engn Program, Riverside, CA 92521 USA

来源：

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE | 2021年 / 52卷 / 07期

关键词：

HIGH-TEMPERATURE DEFORMATION; RARE EARTH ALLOY; MECHANICAL-BEHAVIOR; TEXTURE EVOLUTION; MG ALLOY; PLASTIC-DEFORMATION; CRYSTALLOGRAPHIC TEXTURE; MICROSTRUCTURE EVOLUTION; WROUGHT MAGNESIUM; RATE SENSITIVITY;

D O I：

10.1007/s11661-021-06312-7

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The high-strain-rate response of pure magnesium and AZ31B magnesium alloy is examined in compression and in a forced shear-loading top-hat configurations. Compression specimens loaded in the direction normal to the plane of the rolled plate (TT) display higher-strain-rate sensitivity than specimens that were loaded within the plane of the rolled plate (IP). This effect is more pronounced for pure magnesium as compared to the alloy, due to increased twinning in the IP direction as compared to the TT. Additionally, top-hat shear specimens loaded at high strain rates are observed to display stable deformation during loading, and the development of adiabatic shear bands is not observed. We hypothesize that this result is due to adiabatic heating during deformation, which enhanced the contribution of slip, lessened the role twinning, and possibly activated dynamic recrystallization processes, thus, preventing the formation of distinct shear bands.

引用

页码：3152 / 3170

页数：19

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