Viscoplastic Characterization of Ti-6-4: Experiments

Lerch, Bradley A.; Arnold, Steven M.

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NASA NTRS · 20160008952

Viscoplastic Characterization of Ti-6-4: Experiments

Lerch, Bradley A.·Arnold, Steven M.

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Abstract

As part of a continued effort to improve the understanding of material time-dependent response, a series of mechanical tests have been conducted on the titanium alloy, Ti-6Al-4V. Tensile, creep, and stress relaxation tests were performed over a wide range of temperatures and strain rates to engage various amounts of time-dependent behavior. Additional tests were conducted that involved loading steps, overloads, dwell periods, and block loading segments to characterize the interaction between plasticity and time-dependent behavior. These data will be used to characterize a recently developed, viscoelastoplastic constitutive model with a goal toward better estimates of aerospace component behavior, resulting in improved safety.

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mechanical properties plastic deformation Poisson ratio constitutive equations stress relaxation Viscoplasticity titanium creep viscoelasticity

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Lerch, Bradley A., Arnold, Steven M.. 2016-07-01. Viscoplastic Characterization of Ti-6-4: Experiments. https://ntrs.nasa.gov/citations/20160008952

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