Fractography of hydrogen-embrittled iron-chromium-nickel alloys

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Tensile specimens of iron-chromium-nickel base alloys were broken in either a hydrogen environment or in air following thermal charging with hydrogen. Fracture surfaces were examined by scanning electron microscopy. Fracture morphology of hydrogen-embrittled specimens was characterized by: changed dimple size, twin-boundary parting, transgranular cleavage, and intergranular separation. The nature and extent of the fracture mode changes induced by hydrogen varied systematically with alloy composition and test temperature. Initial microstructure developed during deformation processing and heat treating had a secondary influence on fracture mode.

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Pages: 17

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Caskey, G. R., Jr. January 1, 1980.

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Description

Tensile specimens of iron-chromium-nickel base alloys were broken in either a hydrogen environment or in air following thermal charging with hydrogen. Fracture surfaces were examined by scanning electron microscopy. Fracture morphology of hydrogen-embrittled specimens was characterized by: changed dimple size, twin-boundary parting, transgranular cleavage, and intergranular separation. The nature and extent of the fracture mode changes induced by hydrogen varied systematically with alloy composition and test temperature. Initial microstructure developed during deformation processing and heat treating had a secondary influence on fracture mode.

Physical Description

Pages: 17

Notes

NTIS, PC A02/MF A01.

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  • 13. annual technical meeting of the International Metallographic Society, Brighton, UK, 18 Aug 1980

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  • Report No.: DP-MS-80-19
  • Report No.: CONF-800833-2
  • Grant Number: AC09-76SR00001
  • Office of Scientific & Technical Information Report Number: 5185126
  • Archival Resource Key: ark:/67531/metadc1056352

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Office of Scientific & Technical Information Technical Reports

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  • January 1, 1980

Added to The UNT Digital Library

  • Jan. 22, 2018, 7:23 a.m.

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  • Jan. 31, 2018, 5:23 p.m.

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Caskey, G. R., Jr. Fractography of hydrogen-embrittled iron-chromium-nickel alloys, article, January 1, 1980; Aiken, South Carolina. (digital.library.unt.edu/ark:/67531/metadc1056352/: accessed November 16, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.