Deformation behavior of Mo5Si3 single crystal at high temperatures

K. Yoshimi; M. H. Yoo; A. A. Wereszczak; S. M. Borowicz; E. P. George; E. Miura; S. Hanada

doi:10.1016/S0921-5093(01)01578-7

Deformation behavior of Mo₅Si₃ single crystal at high temperatures

K. Yoshimi, M. H. Yoo, A. A. Wereszczak, S. M. Borowicz, E. P. George, E. Miura, S. Hanada

Mechanical Properties and Mechanics

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

23 Scopus citations

Abstract

Compressive deformation behavior of D8_m-type Mo₅Si₃ single crystals was investigated at temperatures between 1473 and 1723 K in an argon atmosphere. Four compression axes, namely [001], near-[111], near [101] and [100] were chosen. Plasticity occured at and above 1573 K, whereas at 1473 K the crystal failed by brittle fracture before yielding. After high-temperature yielding, all crystals except the [001] crystal exhibited a large yield drop, followed by an apparent steady state flow. Slip traces of {110} and other relatively low index planes were observed on crystal surfaces. Dislocations were characterized on (001) slip plane by TEM, and <110>(001) slip was identified. Considering the constant-stress flow behavior as a steady-state creep process, it was estimated that a stress component is about 6 and an apparent activation energy of deformation is approximately 490 kJ mol^-1.

Original language	English
Pages (from-to)	228-234
Number of pages	7
Journal	Materials Science and Engineering: A
Volume	329-331
DOIs	https://doi.org/10.1016/S0921-5093(01)01578-7
State	Published - Jun 2002

Funding

The authors thank E. Aoyagi and Y. Hayasaka of IMR, Tohoku University for their assistance for TEM sample preparation. This research was sponsored by the Division of Materials Science and Engineering, Office of Basic Energy Sciences, US Department of Energy, under Contract DE-AC05-00OR22725 with UT-Battelle, LLC.

Funders	Funder number
Division of Materials Science and Engineering
Office of Basic Energy Sciences
US Department of Energy	DE-AC05-00OR22725

Keywords

High temperature
Intermetallic compound
Mechanical properties
Molybdenum silicide
Single crystal

Access to Document

10.1016/S0921-5093(01)01578-7

Cite this

@article{89b530b4ec8f474297f0ad953cb9d37e,

title = "Deformation behavior of Mo5Si3 single crystal at high temperatures",

abstract = "Compressive deformation behavior of D8m-type Mo5Si3 single crystals was investigated at temperatures between 1473 and 1723 K in an argon atmosphere. Four compression axes, namely [001], near-[111], near [101] and [100] were chosen. Plasticity occured at and above 1573 K, whereas at 1473 K the crystal failed by brittle fracture before yielding. After high-temperature yielding, all crystals except the [001] crystal exhibited a large yield drop, followed by an apparent steady state flow. Slip traces of {110} and other relatively low index planes were observed on crystal surfaces. Dislocations were characterized on (001) slip plane by TEM, and <110>(001) slip was identified. Considering the constant-stress flow behavior as a steady-state creep process, it was estimated that a stress component is about 6 and an apparent activation energy of deformation is approximately 490 kJ mol-1.",

keywords = "High temperature, Intermetallic compound, Mechanical properties, Molybdenum silicide, Single crystal",

author = "K. Yoshimi and Yoo, {M. H.} and Wereszczak, {A. A.} and Borowicz, {S. M.} and George, {E. P.} and E. Miura and S. Hanada",

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language = "English",

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T1 - Deformation behavior of Mo5Si3 single crystal at high temperatures

AU - Yoshimi, K.

AU - Yoo, M. H.

AU - Wereszczak, A. A.

AU - Borowicz, S. M.

AU - George, E. P.

AU - Miura, E.

AU - Hanada, S.

PY - 2002/6

Y1 - 2002/6

N2 - Compressive deformation behavior of D8m-type Mo5Si3 single crystals was investigated at temperatures between 1473 and 1723 K in an argon atmosphere. Four compression axes, namely [001], near-[111], near [101] and [100] were chosen. Plasticity occured at and above 1573 K, whereas at 1473 K the crystal failed by brittle fracture before yielding. After high-temperature yielding, all crystals except the [001] crystal exhibited a large yield drop, followed by an apparent steady state flow. Slip traces of {110} and other relatively low index planes were observed on crystal surfaces. Dislocations were characterized on (001) slip plane by TEM, and <110>(001) slip was identified. Considering the constant-stress flow behavior as a steady-state creep process, it was estimated that a stress component is about 6 and an apparent activation energy of deformation is approximately 490 kJ mol-1.

AB - Compressive deformation behavior of D8m-type Mo5Si3 single crystals was investigated at temperatures between 1473 and 1723 K in an argon atmosphere. Four compression axes, namely [001], near-[111], near [101] and [100] were chosen. Plasticity occured at and above 1573 K, whereas at 1473 K the crystal failed by brittle fracture before yielding. After high-temperature yielding, all crystals except the [001] crystal exhibited a large yield drop, followed by an apparent steady state flow. Slip traces of {110} and other relatively low index planes were observed on crystal surfaces. Dislocations were characterized on (001) slip plane by TEM, and <110>(001) slip was identified. Considering the constant-stress flow behavior as a steady-state creep process, it was estimated that a stress component is about 6 and an apparent activation energy of deformation is approximately 490 kJ mol-1.

KW - High temperature

KW - Intermetallic compound

KW - Mechanical properties

KW - Molybdenum silicide

KW - Single crystal

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