Microstructure and Mechanical Properties of Zr-Co-Ni Intermetallic Compound

Mitsuhiro Matsuda; Katsutoshi Hayashi; Minoru Nishida

doi:10.4028/www.scientific.net/MSF.638-642.1379

Paper Titles

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The Influence of Deformation Conditions on Structure of Fe-Al Intermetallic Phase ‒ Based Alloys
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Microstructure and Mechanical Properties of a Cast Intermetallic Ti-46Al-8Ta Alloy
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Comparison of Fluorination Treatments to Improve the High Temperature Oxidation Resistance of TiAl Alloys in SO₂ Containing Environments
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Microstructure and Mechanical Properties of Zr-Co-Ni Intermetallic Compound
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Non-Destructive Fluorine Depth Profiling as Quality Assurance for the Oxidation Protection of TiAl Turbine Blades
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Preparation of Homogeneous Nb-Al Intermetallic Compound Sheet by Multi-Layered Rolling and Subsequent Heat Treatment
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Microstructure Formation in Cast β-Solidifying γ-Titanium Aluminide Alloys
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Second Phase Precipitation within a Laves Phase in the Ir-Y Binary System
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Microstructure and Mechanical Properties of Zr-Co-Ni Intermetallic Compound

Abstract:

The relationship between the microstructure and mechanical properties on the ternary ZrCoNi alloys has been investigated. Zr50Co50-xNix alloys undergo martensitic transformation from the B2 to B33 structure by the substitution of Ni for Co. The tensile ductility at room temperature increases remarkably without the loss of yield strength by substituting Ni. Zr50Co39Ni11 alloy has the extremely high plastic elongation of 21%. There are many {021}B33 deformation twins in the B2 parent phase just near the tensile fractured area. These twins are the strain induced martensitic phase due to the tensile deformation. Consequently, the remarkable improvement of the ductility of ZrCoNi alloys is due to the transformation induced plasticity.