Dynamic Compression Behavior and Numerical Modeling of Ti-6246 Alloy at Different Temperatures

Dmitri Gomon; Mikko Hokka; Veli Tapani Kuokkala

doi:10.4028/www.scientific.net/KEM.527.159

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Effect of New Superhard Phases Formation on Properties of Composite Processed by SHS
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Recycling of Al-W-B Composite Material
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Characterization of Mechanical Milling Cermet Powders Produced by Disintegrator Technology
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Investigation of TiO₂ Ceramic Surface Conductivity Using Conductive Atomic Force Microscopy
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Dynamic Compression Behavior and Numerical Modeling of Ti-6246 Alloy at Different Temperatures
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Wear Estimation Using 3D Surface Roughness Parameters
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The Analysis of Abrasive Wear of the Helical Grooved Journal Bearing
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Wear Behaviour of Recycled Hard Particle Reinforced NiCrBSi Hardfacings Deposited by Plasma Transferred Arc (PTA) Process
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Abrasive Wear Resistance of Recycled Hardmetal Reinforced Thick Coating
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Dynamic Compression Behavior and Numerical Modeling of Ti-6246 Alloy at Different Temperatures

Abstract:

The current research concentrates on the characterization of the mechanical behavior of Ti-6Al-2Sn-4Zr-6Mo alloy. The material was studied in compression using the Split Hopkinson Pressure Bar (SHPB) equipment at high strain rates and conventional servohydraulic materials testing devices at low strain rates. The tests were performed at temperatures ranging from room temperature up to 600 °C. According to the results of the compression tests, the strain hardening rate of the studied material decreases strongly with increasing strain rate. The observed strong decrease in the strain hardening rate with increasing strain rate is a consequence of the extremely strong adiabatic heating of the material due to its high strength and low thermal conductivity. In this study, the Johnson-Cook material model parameters were obtained from isothermal stress-strain curves that were calculated from the experimental (adiabatic) stress-strain data. In this paper, the results of the mechanical testing at high strain rates and the numerical modeling of the material behavior are presented and discussed in details.