Mechanical and microstructural responses and microcrack formation in titanium aluminides at a wide range of strain rate and temperature

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Significant progress has been made in the development of titanium aluminide alloys for high temperature and high performance applications in the last decade. An extensive database on the mechanical and microstructural responses of titanium aluminides under various quasi-static loading conditions has been developed. However, knowledge of the mechanical and microstructural responses of titanium aluminides under dynamic loading conditions remains poorly understood. A systematic investigation of the strain rate and temperature effect on mechanical and microstructural responses, microcrack nucleation and microcrack propagation in three titanium aluminide alloys, a polysynthetically twinned (PST) TiAl crystal, a duplex {gamma}-TiAl alloy and a polycrystalline Ti{sub ... continued below

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4 p.

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Jin, Z.; Cady, C.; Vaidya, R.U.; Butt, D.P.; Gray, G.T. III; Kim, Y.W. et al. December 31, 1996.

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Description

Significant progress has been made in the development of titanium aluminide alloys for high temperature and high performance applications in the last decade. An extensive database on the mechanical and microstructural responses of titanium aluminides under various quasi-static loading conditions has been developed. However, knowledge of the mechanical and microstructural responses of titanium aluminides under dynamic loading conditions remains poorly understood. A systematic investigation of the strain rate and temperature effect on mechanical and microstructural responses, microcrack nucleation and microcrack propagation in three titanium aluminide alloys, a polysynthetically twinned (PST) TiAl crystal, a duplex {gamma}-TiAl alloy and a polycrystalline Ti{sub 3}Al-based alloy, was carried out in this study. The mechanical behavior observed in these three alloys will be interpreted based on the characterized deformation microstructures. Microcrack nucleation and propagation mechanisms will be discussed in detail in terms of the observed mechanical and microstructural responses of these alloys.

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4 p.

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OSTI as DE97002344

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  • 2. international symposium on structural intermetallics, Champion, PA (United States), 21-26 Sep 1997

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  • Other: DE97002344
  • Report No.: LA-UR--96-3778
  • Report No.: CONF-970909--1
  • Grant Number: W-7405-ENG-36
  • Office of Scientific & Technical Information Report Number: 532528
  • Archival Resource Key: ark:/67531/metadc689759

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  • December 31, 1996

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  • Aug. 14, 2015, 8:43 a.m.

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  • Feb. 25, 2016, 8:55 p.m.

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Jin, Z.; Cady, C.; Vaidya, R.U.; Butt, D.P.; Gray, G.T. III; Kim, Y.W. et al. Mechanical and microstructural responses and microcrack formation in titanium aluminides at a wide range of strain rate and temperature, article, December 31, 1996; New Mexico. (digital.library.unt.edu/ark:/67531/metadc689759/: accessed September 20, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.