Constitutive Relations for Inelastic Deformation and Damage Accumulation in Hard Alpha Titanium

[+] Author and Article Information
Kwai S. Chan

Southwest Research Institute, 6220 Culebra Road, San Antonio, TX 78238

J. Eng. Mater. Technol 123(3), 281-286 (Mar 11, 2001) (6 pages) doi:10.1115/1.1373653 History: Received May 25, 2000; Revised March 11, 2001
Copyright © 2001 by ASME
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Experimental correlation and least-square fit of the flow or fracture stress, Yn, of hard alpha as a function of nitrogen content. The least-square fit applies to the fracture stress only.
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Semi-log plot of flow, Y, or fracture stress, Yi, as a function of pressure, P=σkk/3; both Yi and P are normalized by the uniaxial compression flow or fracture stress, Yn
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Engineering stress-strain curves of hard alpha Ti with various nitrogen contents tested by plane strain compression at a strain rate of 0.01 s−1
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Comparison of the calculated fracture stress of the intact materials and the “flow” stress of the failed material
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Calculated and measured flow stress of hard alpha Ti as a function of nitrogen contents for two strain rates
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Comparison of calculated and measured true stress-strain curves of hard alpha Ti with 2 wt. percent N for two strain rates
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Measured true-stress-strain curves compared to model calculations for two strain rates. The experimental data (GE data) were corrected for adiabatic heating.
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Comparison of calculated and measured flow and fracture stresses of hard alpha Ti




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