Transformation-mismatch plasticity of NiA1/ZrO2 composites - Experiments and continuum modeling

Peter Zwigl; David C. Dunand

doi:10.1016/S0921-5093(00)01343-5

Transformation-mismatch plasticity of NiA1/ZrO₂ composites - Experiments and continuum modeling

Peter Zwigl, David C. Dunand^*

^*Corresponding author for this work

Materials Science and Engineering

Research output: Contribution to journal › Article › peer-review

8 Scopus citations

Abstract

NiAl composites containing 10 and 20 vol.% unstabilized zirconia particles were thermally cycled around the polymorphic phase transformation range of zirconia while being subjected to an external uniaxial tensile stress. The strain rate of the composite during thermal cycling is significantly higher than the isothermal creep rate of either composite or unreinforced matrix at the same average temperature. An established model for transformation-mismatch plasticity of an allotropic, creeping metal has been adapted to describe the results. To the best of our knowledge, this is the first demonstration of transformation-mismatch plasticity in a compesite induced through transformation of the minority-phase reinforcement.

Original language	English (US)
Pages (from-to)	63-72
Number of pages	10
Journal	Materials Science and Engineering: A
Volume	298
Issue number	1-2
DOIs	https://doi.org/10.1016/S0921-5093(00)01343-5
State	Published - 2001

Keywords

Creep
Metal matrix composites
NiA1
Phase transformations
Superplasticity
ZrO

ASJC Scopus subject areas

Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering
General Materials Science

Access to Document

10.1016/S0921-5093(00)01343-5

Cite this

@article{9d032fb9c084474b9f15f411d224aac6,

title = "Transformation-mismatch plasticity of NiA1/ZrO2 composites - Experiments and continuum modeling",

abstract = "NiAl composites containing 10 and 20 vol.% unstabilized zirconia particles were thermally cycled around the polymorphic phase transformation range of zirconia while being subjected to an external uniaxial tensile stress. The strain rate of the composite during thermal cycling is significantly higher than the isothermal creep rate of either composite or unreinforced matrix at the same average temperature. An established model for transformation-mismatch plasticity of an allotropic, creeping metal has been adapted to describe the results. To the best of our knowledge, this is the first demonstration of transformation-mismatch plasticity in a compesite induced through transformation of the minority-phase reinforcement.",

keywords = "Creep, Metal matrix composites, NiA1, Phase transformations, Superplasticity, ZrO",

author = "Peter Zwigl and Dunand, {David C.}",

note = "Funding Information: This study was supported by the US Army Research Office (grant DAAH004-95-1-0629) when both authors were at the Department of Materials Science and Engineering of the Massachusetts Institute of Technology (MIT). DCD also acknowledges the support of AMAX in the form of a career development chair at MIT.",

year = "2001",

doi = "10.1016/S0921-5093(00)01343-5",

language = "English (US)",

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T1 - Transformation-mismatch plasticity of NiA1/ZrO2 composites - Experiments and continuum modeling

AU - Zwigl, Peter

AU - Dunand, David C.

N1 - Funding Information: This study was supported by the US Army Research Office (grant DAAH004-95-1-0629) when both authors were at the Department of Materials Science and Engineering of the Massachusetts Institute of Technology (MIT). DCD also acknowledges the support of AMAX in the form of a career development chair at MIT.

PY - 2001

Y1 - 2001

N2 - NiAl composites containing 10 and 20 vol.% unstabilized zirconia particles were thermally cycled around the polymorphic phase transformation range of zirconia while being subjected to an external uniaxial tensile stress. The strain rate of the composite during thermal cycling is significantly higher than the isothermal creep rate of either composite or unreinforced matrix at the same average temperature. An established model for transformation-mismatch plasticity of an allotropic, creeping metal has been adapted to describe the results. To the best of our knowledge, this is the first demonstration of transformation-mismatch plasticity in a compesite induced through transformation of the minority-phase reinforcement.

AB - NiAl composites containing 10 and 20 vol.% unstabilized zirconia particles were thermally cycled around the polymorphic phase transformation range of zirconia while being subjected to an external uniaxial tensile stress. The strain rate of the composite during thermal cycling is significantly higher than the isothermal creep rate of either composite or unreinforced matrix at the same average temperature. An established model for transformation-mismatch plasticity of an allotropic, creeping metal has been adapted to describe the results. To the best of our knowledge, this is the first demonstration of transformation-mismatch plasticity in a compesite induced through transformation of the minority-phase reinforcement.

KW - Creep

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KW - Phase transformations

KW - Superplasticity

KW - ZrO

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