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Effect of Zr addition on the mechanical properties of Nb–]Si based alloys
M. Sankar, , V. V. Satya Prasad
Published in Elsevier Ltd
2019
Volume: 754
   
Pages: 224 - 231
Abstract
In the present study, the effect of Zr addition on the mechanical properties of arc melted hypoeutectic Nb−16 at. %Si alloy has been investigated. The alloys were characterized by scanning electron microscopy (SEM), electron back scattered diffraction (EBSD), hardness test, nanoindentation test, compression test and three point bend test. The desirable phase α−Nb 5 Si 3 phase could be obtained in alloys containing 4 at. % or more Zr. Nanoindentation results showed that the elastic modulus of Nb ss phase is not significantly influenced by Zr additions whereas elastic modulus of Nb 3 Si and α−Nb 5 Si 3 phases are considerably improved by Zr additions. The strength, plasticity and room temperature fracture toughness of the alloys are significantly increased with Zr addition. The maximum compressive strength of 2160 ± 80 MPa, plastic strain of 2.6 ± 0.2% and fracture toughness of 14.3 ± 0.3MPam 1/2 are achieved in alloy with 4 at.% Zr. © 2019 Elsevier B.V.
About the journal
JournalData powered by TypesetMaterials Science and Engineering A
PublisherData powered by TypesetElsevier Ltd
ISSN09215093
Open AccessNo
Concepts (22)
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    Compression testing
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    Compressive strength
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    Elastic moduli
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    Electron microscopy
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    Fracture toughness
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    Hardness
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    INTERMETALLICS
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    Nanoindentation
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    Phase transitions
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    Plasticity
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    Scanning electron microscopy
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    Silicon alloys
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    Zirconium
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    ARC MELTED
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    Electron back-scattered diffraction
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    MAXIMUM COMPRESSIVE STRENGTHS
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    NANOINDENTATION TESTS
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    SI ALLOYS
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    SI-BASED
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    THREE POINT BEND TESTS
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    ZR ADDITION
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    Mechanical properties