Spall fracture in additive manufactured tantalum

Jones, David Robert; Fensin, Saryu Jindal; Ndefru, Bineh Gese; Martinez, Daniel Tito; Trujillo, Carl Patrick; Gray III, George Thompson

doi:10.1063/1.5063930

Spall fracture in additive manufactured tantalum

Journal Article · Mon Dec 10 00:00:00 EST 2018 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.5063930· OSTI ID:1489965

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Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

In this work, we present a series of experiments on the response of additive manufactured (AM) tantalum to dynamic loading, specifically the spall strength. Rectangular plates of AM tantalum were produced, with subsequent characterization revealing a highly anisotropic microstructure. Samples were taken from these plates to investigate the effect of anisotropy on the spall strength: the resistance to high strain-rate tensile damage. A conventional, wrought tantalum sample, possessing an equiaxed microstructure, was also tested to serve as a control. Additionally, shock loading was performed via light gas-gun flyer-plate impact experiments, with laser velocimetry on the rear of the samples to record the shock wave profiles and soft-recovery techniques to allow post-mortem analysis. In general, the AM samples were found to have a higher Hugoniot elastic limit, the dynamic yield strength under shock loading, while having a reduced spall strength, when compared to the wrought tantalum samples.

View Accepted Manuscript (DOE)

Research Organization:: Los Alamos National Laboratory (LANL)

Sponsoring Organization:: Laboratory Directed Research and Development (LDRD); USDOE National Nuclear Security Administration (NNSA)

Grant/Contract Number:: 89233218CNA000001; AC52-06NA25396

OSTI ID:: 1489965

Report Number(s):: LA-UR-18-29361

Journal Information:: Journal of Applied Physics, Journal Name: Journal of Applied Physics Journal Issue: 22 Vol. 124; ISSN 0021-8979

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: English

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36 MATERIALS SCIENCE
42 ENGINEERING
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plate-impact
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