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Title: Spall fracture in additive manufactured tantalum

Abstract

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.

Authors:
ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1];  [1]; ORCiD logo [1]
  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA); USDOE Laboratory Directed Research and Development (LDRD) Program
OSTI Identifier:
1489965
Report Number(s):
LA-UR-18-29361
Journal ID: ISSN 0021-8979
Grant/Contract Number:  
89233218CNA000001; AC52-06NA25396
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Journal of Applied Physics
Additional Journal Information:
Journal Volume: 124; Journal Issue: 22; Journal ID: ISSN 0021-8979
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 42 ENGINEERING; Additive manufacturing; spall fracture; tantalum; plate-impact

Citation Formats

Jones, David Robert, Fensin, Saryu Jindal, Ndefru, Bineh Gese, Martinez, Daniel Tito, Trujillo, Carl Patrick, and Gray III, George Thompson. Spall fracture in additive manufactured tantalum. United States: N. p., 2018. Web. doi:10.1063/1.5063930.
Jones, David Robert, Fensin, Saryu Jindal, Ndefru, Bineh Gese, Martinez, Daniel Tito, Trujillo, Carl Patrick, & Gray III, George Thompson. Spall fracture in additive manufactured tantalum. United States. https://doi.org/10.1063/1.5063930
Jones, David Robert, Fensin, Saryu Jindal, Ndefru, Bineh Gese, Martinez, Daniel Tito, Trujillo, Carl Patrick, and Gray III, George Thompson. 2018. "Spall fracture in additive manufactured tantalum". United States. https://doi.org/10.1063/1.5063930. https://www.osti.gov/servlets/purl/1489965.
@article{osti_1489965,
title = {Spall fracture in additive manufactured tantalum},
author = {Jones, David Robert and Fensin, Saryu Jindal and Ndefru, Bineh Gese and Martinez, Daniel Tito and Trujillo, Carl Patrick and Gray III, George Thompson},
abstractNote = {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.},
doi = {10.1063/1.5063930},
url = {https://www.osti.gov/biblio/1489965}, journal = {Journal of Applied Physics},
issn = {0021-8979},
number = 22,
volume = 124,
place = {United States},
year = {2018},
month = {12}
}

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Works referencing / citing this record:

Understanding and predicting damage and failure at grain boundaries in BCC Ta
journal, October 2019