Constitutive Equation for V–5Cr–5Ti at High Temperatures Measured Using the SHPB Technique

Wen Jun Hu; Ruo Ze Xie; Xi Cheng Huang; Yi Xia Yan

doi:10.4028/www.scientific.net/AMR.314-316.1154

Paper Titles

Analysis of Forming Mechanism of Thermal Damages on Friction Surfaces of Brake Disc
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Study on Wear Properties and Mechanisms of Coated Carbide Tools in Dry Turning of 300M Steel
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Numerical Analysis of Stress Field for Simulating Pressure Vessel Nozzles
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Experimental Research on Compound and Efficient Powerful Milling Process of Blisk
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Constitutive Equation for V–5Cr–5Ti at High Temperatures Measured Using the SHPB Technique
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Influence of δ Phase Content on Hot Deformation Behavior of Ni-Based Superalloy IN718
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Effect of Welding Thermal Cycle on the Microstructure and Mechanical Properties in Multi-Pass Submerged-Arc Welding
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Experimental Study on Ball End Mill in Glass Machining at High Speed
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Simulation of the High-Speed Milling Temperature of Titanium Alloy Ti - 6Al - 4V
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Constitutive Equation for V–5Cr–5Ti at High Temperatures Measured Using the SHPB Technique

Abstract:

A high temperature split Hopkinson pressure bar (SHPB) test system is used to investigate the effects of temperature as well as those of strain and strain-rate. Effects of temperature for the vanadium alloy (V-5Cr-5Ti) are investigated by developing a high temperature SHPB test system. In this work, high temperatures greater than 1100°C are attained in the SHPB test specimens by using a synchronically assembled heating system .When testing with the high-temperature SHPB apparatus, care is required to prevent oxidation of the surface of the specimen, and to prevent an inhomogeneous temperature distribution from developing in the specimen. To determine the true flow stress–true strain relationship, specimens are tested from 15°C to 1100°C and at a strain-rate of about 3000 s-1: The parameters for a Johnson–Cook constitutive equation is determined from the test results. The Johnson–Cook constitutive equation is suitable for expressing the dynamic behavior of the V-5Cr-5Ti vanadium alloy.