Determination of post-yield hardening response in a ZrB2 ceramic

被引：10

作者：

Blaber, Justin A. ^{[1
]}

Ghosh, Dipankar ^{[2
]}

Subhash, Ghatu ^{[1
]}

McCumiskey, Edward ^{[1
]}

Taylor, Curtis R. ^{[1
]}

机构：

[1] Univ Florida, Dept Mech & Aerosp Engn, Gainesville, FL 32611 USA

[2] Univ Florida, Dept Mat Sci & Engn, Gainesville, FL 32611 USA

来源：

SCRIPTA MATERIALIA | 2011年 / 65卷 / 11期

关键词：

Slip lines; Plasticity; Nanoindentation; ZrB2; Post-yield hardening; DEFORMATION; PLASTICITY; ZIRCONIUM; SILICON; ALUMINA;

D O I：

10.1016/j.scriptamat.2011.08.020

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The extent of dislocation-based plasticity in ceramics is limited and often accompanied by microcracking. This limitation has precluded the investigation of post-yield plastic response in ceramics. Using low-load nanoindentations and by tracking the hardness of selected grains before and after plastic deformation, the influence of microcracking and variability in microhardness due to grain orientation were minimized and the post-yield response of polycrystalline ZrB2 ceramic was determined. The observed increase in nanoindentation hardness after plastically deforming isolated ZrB2 grains indicates conclusively the existence of post-yield strain hardening. (C) 2011 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：962 / 965

页数：4

共 16 条

[1]

BANINI GK, 2002, INT J MATER RES, V9, P875

[2] PLASTICITY OF CUBIC ZIRCONIA BETWEEN 700-DEGREES-C AND 1150-DEGREES-C OBSERVED BY MACROSCOPIC COMPRESSION AND BY IN-SITU TENSILE STRAINING TESTS [J].

BAUFELD, B ;

MESSERSCHMIDT, U ;

BARTSCH, M ;

BAITHER, D .

PLASTICITY OF METALS AND ALLOYS - ISPMA 6, 1994, 97-9 :431-436

[3] Refractory diborides of zirconium and hafnium [J].

Fahrenholtz, William G. ;

Hilmas, Gregory E. ;

Talmy, Inna G. ;

Zaykoski, James A. .

JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 2007, 90 (05) :1347-1364

[4] Two new expanding cavity models for indentation deformations of elastic strain-hardening materials [J].

Gao, XL ;

Jing, XN ;

Subhash, G .

INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES, 2006, 43 (7-8) :2193-2208

[5] Scratch-induced microplasticity and microcracking in zirconium diboride-silicon carbide composite [J].

Ghosh, Dipankar ;

Subhash, Ghatu ;

Radhakrishnan, Ramachandran ;

Sudarshan, Tirumalai S. .

ACTA MATERIALIA, 2008, 56 (13) :3011-3022

[6] Slip-line spacing in ZrB2-based ultrahigh-temperature ceramics [J].

Ghosh, Dipankar ;

Subhash, Ghatu ;

Orlovskaya, Nina .

SCRIPTA MATERIALIA, 2010, 62 (11) :839-842

[7] Room-temperature dislocation activity during mechanical deformation of polycrystalline ultra-high-temperature ceramics [J].

Ghosh, Dipankar ;

Subhash, Ghatu ;

Bourne, Gerald R. .

SCRIPTA MATERIALIA, 2009, 61 (11) :1075-1078

[8] Inelastic deformation under indentation and scratch loads in a ZrB2-SiC composite [J].

Ghosh, Dipankar ;

Subhash, Ghatu ;

Bourne, Gerald R. .

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY, 2009, 29 (14) :3053-3061

[9] Scratch-induced deformation in fine- and ultrafine-grained bulk alumina [J].

Huang, Lin ;

Zhang, Zhihui ;

Zhao, Yonghao ;

Yao, Wenlong ;

Mukherjee, Amiya K. ;

Schoenung, Julie M. .

SCRIPTA MATERIALIA, 2010, 63 (05) :528-531

[10] Dislocations and twinning activated by the abrasion of Al2O3 [J].

Inkson, BJ .

ACTA MATERIALIA, 2000, 48 (08) :1883-1895

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