The Effects of Nb and Cr Addition on Mechanical and Chemical Properties of Cold-Rolled Ni3(Si,Ti) Intermetallic Foils

Yasuyuki Kaneno; Takayuki Takasugi

doi:10.4028/www.scientific.net/MSF.561-565.411

Paper Titles

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Mechanical Properties of Zr-Added Fe-Al Intermetallic Alloys Containing Large Second Phase Particles
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Influence of Electrical Parameter on the Size of Superalloy Powders Prepared by Spark Plasma Discharge Process
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Microstructure and Plastic Deformation Behavior of Ni₃V Single Crystals
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The Effects of Nb and Cr Addition on Mechanical and Chemical Properties of Cold-Rolled Ni₃(Si,Ti) Intermetallic Foils
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Microstructure and Mechanical Properties of In718 Alloy Produced with Twin-Scanning Atomizer
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Dependence of Strain Rate and Environment on the Mechanical Properties of the Ni-19Si-3Nb-1Cr-0.2B Intermetallic Alloy at High Temperature
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Effect of Isothermal Forging on Microstructures and Mechanical Properties of Nb-Si In Situ Composite
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High Temperature Oxidation Behavior of MoSi₂ under Low Pressure Atmosphere
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The Effects of Nb and Cr Addition on Mechanical and Chemical Properties of Cold-Rolled Ni₃(Si,Ti) Intermetallic Foils

Abstract:

Nb and/or Cr added Ni3(Si,Ti) as well as unalloyed Ni3(Si,Ti) intermetallic thin foils (i.e., Ni3(Si,Ti), Ni3(Si,Ti)+Nb, Ni3(Si,Ti)+Cr and Ni3(Si,Ti)+Nb,Cr) were fabricated from arc-melted polycrystalline ingots by thermomechanical process and subsequent heavy cold-rolling. Tensile property at room temperature as well as at high temperature and oxidization behavior of the cold-rolled foils with a thickness of ~200μm were investigated. The Ni3(Si,Ti) and Ni3(Si,Ti)+Nb alloys showed a single-phase microstructure consisting of L12 phase, while the Ni3(Si,Ti)+Cr and Ni3(Si,Ti)+Nb,Cr alloys exhibited a two-phase microstructure with A1 (fcc) Ni solid solution phase within the L12 grains. All the cold-rolled foils showed high tensile strength (over 2GPa) at room temperature although no plastic elongation was observed. The addition of Nb and/or Cr slightly enhanced the room-temperature tensile strength of the Ni3(Si,Ti) alloy. On the other hand, the addition of Nb and/or Cr prominently enhanced high-temperature tensile strength as well as oxidization resistance, while the addition of Cr improved high-temperature elongation.