TRANSFORMATION PLASTICITY AT HIGH-STRAIN RATE IN MAGNESIA-PARTIALLY-STABILIZED ZIRCONIA

被引：17

作者：

ROGERS, WP ^{[1
]}

NEMATNASSER, S ^{[1
]}

机构：

[1] UNIV CALIF SAN DIEGO,DEPT APPL MECH & ENGN SCI,LA JOLLA,CA 92093

来源：

JOURNAL OF THE AMERICAN CERAMIC SOCIETY | 1990年 / 73卷 / 01期

关键词：

compression; mechanical properties; partially stabilized zirconia; plasticity; strain;

D O I：

10.1111/j.1151-2916.1990.tb05105.x

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Transformation plasticity in magnesia‐partially‐stabilized zirconia (Mg‐PSZ) is studied using a split Hopkinson pressure bar modified for ceramic materials. Axial and transverse strains are measured under uniaxial compressive loading at a strain rate of 250/s. The transformation yield stress is found to increase from 900 MPa under quasi‐static loading to 1.2 GPa at high strain rate. Post‐yield deformation is characterized by shear and volumetric plastic strains up to 1.2%. During unloading, the axial and transverse plastic strains are partially recovered while the volume is conserved. Axially oriented microcracks are observed but they do no contribute significantly to plastic deformation in Mg‐PSZ. Copyright © 1990, Wiley Blackwell. All rights reserved

引用

页码：136 / 139

页数：4

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