Elevated temperature deformation behavior of discontinuous-reinforced titanium aluminide matrix composites

J. S. Marte; S. L. Kampe; A. A. Wereszczak

doi:10.1016/S0921-5093(02)00553-1

Elevated temperature deformation behavior of discontinuous-reinforced titanium aluminide matrix composites

J. S. Marte, S. L. Kampe, A. A. Wereszczak

Mechanical Properties and Mechanics

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

12 Scopus citations

Abstract

A series of Al₃Ti- and near-γ TiAl-matrix discontinuously-reinforced composites have been produced and their elevated temperature flow behavior evaluated. Specifically, steady state compressive flow stress (i.e. maximum flow stress) was determined as a function of temperature (1000, 1100, 1200 °C), strain-rate (10^-3, 10^-4 s^-1), and composite reinforcement loading percentage (30, 40, 50 v%). The experimental results have been used to develop unified constitutive equations for each matrix type that can be used to survey the sensitivity of the respective flow behavior to the independent variables of high temperature wrought processing. The results indicate that while the temperature and strain-rate dependence of flow stress can be described in terms of a traditional Zener-Holloman (temperature-compensated strain-rate) analysis, reinforcement volume percentage may additionally represent a non-traditional but influential independent variable of processing. It is shown that particulate volume loading can be used to positively influence the deformability characteristics of the composite. Crown

Original language	English
Pages (from-to)	292-301
Number of pages	10
Journal	Materials Science and Engineering: A
Volume	346
Issue number	1-2
DOIs	https://doi.org/10.1016/S0921-5093(02)00553-1
State	Published - Apr 15 2003

Funding

The authors wish to acknowledge the sponsorship of Matsys, Inc. (Springfield, VA) and the Office of Naval Research, under contract N00014-96-C-0427. Use of the high temperature testing facility at Oak Ridge National Laboratory was sponsored by the Assistant Secretary for Energy Efficiency and Renewable Energy, Office of Transportation Technologies, Office of Advanced Automotive Technologies, as part of the High Temperature Materials Laboratory User Program, Oak Ridge National Laboratory, managed by UT-Battelle, LLC, for the U.S. Department of Energy under contract number DE-AC05-00OR22725.

Funders	Funder number
Office of Advanced Automotive Technologies
Office of Transportation Technologies
Office of Naval Research	N00014-96-C-0427
U.S. Department of Energy	DE-AC05-00OR22725
Office of Energy Efficiency and Renewable Energy
Oak Ridge National Laboratory

Keywords

High temperature deformation
Particulate reinforced titanium aluminides
TiB-reinforced composites
Titanium aluminide composites

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10.1016/S0921-5093(02)00553-1

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title = "Elevated temperature deformation behavior of discontinuous-reinforced titanium aluminide matrix composites",

abstract = "A series of Al3Ti- and near-γ TiAl-matrix discontinuously-reinforced composites have been produced and their elevated temperature flow behavior evaluated. Specifically, steady state compressive flow stress (i.e. maximum flow stress) was determined as a function of temperature (1000, 1100, 1200 °C), strain-rate (10-3, 10-4 s-1), and composite reinforcement loading percentage (30, 40, 50 v%). The experimental results have been used to develop unified constitutive equations for each matrix type that can be used to survey the sensitivity of the respective flow behavior to the independent variables of high temperature wrought processing. The results indicate that while the temperature and strain-rate dependence of flow stress can be described in terms of a traditional Zener-Holloman (temperature-compensated strain-rate) analysis, reinforcement volume percentage may additionally represent a non-traditional but influential independent variable of processing. It is shown that particulate volume loading can be used to positively influence the deformability characteristics of the composite. Crown",

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AU - Marte, J. S.

AU - Kampe, S. L.

AU - Wereszczak, A. A.

PY - 2003/4/15

Y1 - 2003/4/15

N2 - A series of Al3Ti- and near-γ TiAl-matrix discontinuously-reinforced composites have been produced and their elevated temperature flow behavior evaluated. Specifically, steady state compressive flow stress (i.e. maximum flow stress) was determined as a function of temperature (1000, 1100, 1200 °C), strain-rate (10-3, 10-4 s-1), and composite reinforcement loading percentage (30, 40, 50 v%). The experimental results have been used to develop unified constitutive equations for each matrix type that can be used to survey the sensitivity of the respective flow behavior to the independent variables of high temperature wrought processing. The results indicate that while the temperature and strain-rate dependence of flow stress can be described in terms of a traditional Zener-Holloman (temperature-compensated strain-rate) analysis, reinforcement volume percentage may additionally represent a non-traditional but influential independent variable of processing. It is shown that particulate volume loading can be used to positively influence the deformability characteristics of the composite. Crown

AB - A series of Al3Ti- and near-γ TiAl-matrix discontinuously-reinforced composites have been produced and their elevated temperature flow behavior evaluated. Specifically, steady state compressive flow stress (i.e. maximum flow stress) was determined as a function of temperature (1000, 1100, 1200 °C), strain-rate (10-3, 10-4 s-1), and composite reinforcement loading percentage (30, 40, 50 v%). The experimental results have been used to develop unified constitutive equations for each matrix type that can be used to survey the sensitivity of the respective flow behavior to the independent variables of high temperature wrought processing. The results indicate that while the temperature and strain-rate dependence of flow stress can be described in terms of a traditional Zener-Holloman (temperature-compensated strain-rate) analysis, reinforcement volume percentage may additionally represent a non-traditional but influential independent variable of processing. It is shown that particulate volume loading can be used to positively influence the deformability characteristics of the composite. Crown

KW - High temperature deformation

KW - Particulate reinforced titanium aluminides

KW - TiB-reinforced composites

KW - Titanium aluminide composites

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Elevated temperature deformation behavior of discontinuous-reinforced titanium aluminide matrix composites

Abstract

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