Slip, twinning, and transformation in Laves phases. Final technical report, 1 August 1990--January 31, 1997

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Currently, intermetallic compounds are being studied as potential high-temperature structural materials. Most of these studies are on phases such as Ni{sub 3}Al, TiAl, NiAl, and Ti{sub 3}Al, which have structures that are crystallographic derivatives of fcc, bcc, or hcp structures. However, most intermetallics have more complex crystal structures, and little is known about their deformation mechanisms and mechanical properties. By far the largest class of such compounds is that of the Laves phases, AB{sub 2} compounds having three different crystal structures: C15 (cubic), C14 (hexagonal), and C36 (dihexagonal). This research program explored room-temperature compressive deformation of two-phase alloys containing substantial ... continued below

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9 p.

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Allen, S.M. June 1, 1998.

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Description

Currently, intermetallic compounds are being studied as potential high-temperature structural materials. Most of these studies are on phases such as Ni{sub 3}Al, TiAl, NiAl, and Ti{sub 3}Al, which have structures that are crystallographic derivatives of fcc, bcc, or hcp structures. However, most intermetallics have more complex crystal structures, and little is known about their deformation mechanisms and mechanical properties. By far the largest class of such compounds is that of the Laves phases, AB{sub 2} compounds having three different crystal structures: C15 (cubic), C14 (hexagonal), and C36 (dihexagonal). This research program explored room-temperature compressive deformation of two-phase alloys containing substantial amounts of Laves phase, and, by transmission electron microscopy, characterized the deformation-induced defects in these alloys. The results include: transmission electron microscopy analysis of defect structures to determine deformation mechanisms, use of indentation experiments to gain deeper understanding of deformation mechanisms, systematic study of effects of ternary alloying additions on mechanical properties, and assessment of effects of departure from stoichiometry on phase stability and mechanical properties of Laves phases.

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9 p.

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OSTI as DE98006509

Medium: P; Size: 9 p.

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  • Other Information: PBD: 1 Jun 1998

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  • Other: DE98006509
  • Report No.: DOE/ER/45426--T1
  • Grant Number: FG02-90ER45426
  • DOI: 10.2172/663579 | External Link
  • Office of Scientific & Technical Information Report Number: 663579
  • Archival Resource Key: ark:/67531/metadc711035

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  • June 1, 1998

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  • Sept. 12, 2015, 6:31 a.m.

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Allen, S.M. Slip, twinning, and transformation in Laves phases. Final technical report, 1 August 1990--January 31, 1997, report, June 1, 1998; Cambridge, Massachusetts. (digital.library.unt.edu/ark:/67531/metadc711035/: accessed September 19, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.