Mechanical properties of Ni{sub 3}Al and FeAl: Recent developments

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Recent developments in the understanding of the ductility and fracture behavior of Ni{sub 3}Al and FeAl are reviewed. Both intrinsic factors (e.g., alloy stoichiometry), and extrinsic factors (e.g., environment) have been shown to affect their mechanical properties. Of all the recent developments, perhaps the most significant is the realization that Ni{sub 3}Al and FeAl are intrinsically ductile (at least on the Al-deficient side of stoichiometry); their brittleness when tested in ambient air is due mainly to environmental embrittlement. Another intriguing discovery is that boron embrittles Ni{sub 3}Al in gaseous hydrogen (until recently, B was though to have only beneficial, or ... continued below

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10 p.

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George, E.P. & Liu, C.T. August 1, 1997.

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Recent developments in the understanding of the ductility and fracture behavior of Ni{sub 3}Al and FeAl are reviewed. Both intrinsic factors (e.g., alloy stoichiometry), and extrinsic factors (e.g., environment) have been shown to affect their mechanical properties. Of all the recent developments, perhaps the most significant is the realization that Ni{sub 3}Al and FeAl are intrinsically ductile (at least on the Al-deficient side of stoichiometry); their brittleness when tested in ambient air is due mainly to environmental embrittlement. Another intriguing discovery is that boron embrittles Ni{sub 3}Al in gaseous hydrogen (until recently, B was though to have only beneficial, or at most neutral, effects). The authors review these and other recent discoveries and discuss, wherever possible, the underlying physical mechanisms giving rise to the observed mechanical behavior.

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10 p.

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OSTI as DE97007764

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

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  • Other: DE97007764
  • Report No.: CONF-970909--3
  • Grant Number: AC05-96OR22464
  • Office of Scientific & Technical Information Report Number: 521616
  • Archival Resource Key: ark:/67531/metadc692570

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  • August 1, 1997

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  • Aug. 14, 2015, 8:43 a.m.

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  • Jan. 22, 2016, 11:58 a.m.

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George, E.P. & Liu, C.T. Mechanical properties of Ni{sub 3}Al and FeAl: Recent developments, article, August 1, 1997; Tennessee. (digital.library.unt.edu/ark:/67531/metadc692570/: accessed August 17, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.