Methodology for determining spall damage mode preference in shocked FCC Polycrystalline metals from 3D X-ray tomography data

A. D. Brown, Q. Pham, Pedro Peralta, B. M. Patterson, J. P. Escobedo-Diaz, S. N. Luo, D. Dennis-Koller, E. K. Cerreta, D. Byler, A. Koskelo, X. Xiao

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Three-dimensional X-ray tomography (XRT) provides a non-destructive technique to determine the location, size, and shape of spall damage within shock loaded metals. Polycrystalline copper samples of varying thermomechanical histories were shocked via plate impacts at low pressures to ensure incipient spall conditions. Additionally, samples of similar heat-treated microstructures were impacted at various loading rates. All 3D XRT volumetric void data underwent smoothing, thresholding, and volumetric sieves. The full inertia tensor was found for each void, which was used to create best fit ellipsoids correlating shape to damage modes. Density distributions were plotted for the best-fit ellipsoid semi-axes aspect ratios a/c and b/c, where, a≤b≤c. It was found that >60% of voids in heat-treated samples resembled transgranular damage, whereas >70% of voids in the rolled sample resembled intergranular damage. Preliminary analysis also clearly indicates an increase of void coalescence with decreasing tensile loading stress rates for impacted samples of similar microstructures.

Original languageEnglish (US)
Title of host publicationTMS Annual Meeting
EditorsShadia Jamil Ikhmayies, Shadia Jamil Ikhmayies, Bowen Li, John S. Carpenter, John S. Carpenter, Jiann-Yang Hwang, Jiann-Yang Hwang, Sergio Neves Monteiro, Jian Li, Donato Firrao, Donato Firrao, Donato Firrao, Donato Firrao, Mingming Zhang, Zhiwei Peng, Zhiwei Peng, Zhiwei Peng, Juan Pablo Escobedo-Diaz, Juan Pablo Escobedo-Diaz, Chenguang Bai
PublisherMinerals, Metals and Materials Society
Pages57-64
Number of pages8
EditionCONFCODENUMBER
ISBN (Electronic)9781119264392
StatePublished - Jan 1 2016
EventCharacterization of Minerals, Metals, and Materials 2016 - TMS 2016: 145th Annual Meeting and Exhibition - Nashville, United States
Duration: Feb 14 2016Feb 18 2016

Publication series

NameTMS Annual Meeting
NumberCONFCODENUMBER
Volume0

Other

OtherCharacterization of Minerals, Metals, and Materials 2016 - TMS 2016: 145th Annual Meeting and Exhibition
CountryUnited States
CityNashville
Period2/14/162/18/16

Keywords

  • Copper
  • Microstructure
  • Shock loading
  • Spall
  • X-ray tomography

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanics of Materials
  • Metals and Alloys

Fingerprint Dive into the research topics of 'Methodology for determining spall damage mode preference in shocked FCC Polycrystalline metals from 3D X-ray tomography data'. Together they form a unique fingerprint.

Cite this