Micromechanics of spall and damage in tantalum

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The authors conducted a series of plate impact experiments using an 80-mm launcher to study dynamic void initiation, linkup, and spall in tantalum. The tests ranged in peak shock pressures so that the effect of peak pressure on the transition from void initiation, incipient spall, and full spall could be studied. Wave profiles were measured using a velocity interferometry system (VISAR), and targets were recovered using {open_quotes}soft{close_quotes} recovery techniques. The authors utilized scanning electron microscopy, metallographic cross-sections, and plateau etching techniques to obtain quantitative information concerning damage evolution in tantalum under spall conditions. The data (wave profiles and micrographs) are ... continued below

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8 p.

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Zurek, A.K.; Thissell, W.R.; Johnson, J.N.; Tonks, D.L. & Hixson, R. May 1, 1996.

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Description

The authors conducted a series of plate impact experiments using an 80-mm launcher to study dynamic void initiation, linkup, and spall in tantalum. The tests ranged in peak shock pressures so that the effect of peak pressure on the transition from void initiation, incipient spall, and full spall could be studied. Wave profiles were measured using a velocity interferometry system (VISAR), and targets were recovered using {open_quotes}soft{close_quotes} recovery techniques. The authors utilized scanning electron microscopy, metallographic cross-sections, and plateau etching techniques to obtain quantitative information concerning damage evolution in tantalum under spall conditions. The data (wave profiles and micrographs) are analyzed in terms of a new theory and model of dynamic damage cluster growth.

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8 p.

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OSTI as DE96008491

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  • 6. international conference on metal forming, Krakow (Poland), Jun 1996

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  • Other: DE96008491
  • Report No.: LA-UR--96-0615
  • Report No.: CONF-9606175--1
  • Grant Number: W-7405-ENG-36
  • Office of Scientific & Technical Information Report Number: 231956
  • Archival Resource Key: ark:/67531/metadc667120

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  • May 1, 1996

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  • June 29, 2015, 9:42 p.m.

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  • April 21, 2016, 9:55 p.m.

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Zurek, A.K.; Thissell, W.R.; Johnson, J.N.; Tonks, D.L. & Hixson, R. Micromechanics of spall and damage in tantalum, article, May 1, 1996; New Mexico. (digital.library.unt.edu/ark:/67531/metadc667120/: accessed December 17, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.