Work

Boron and hydrogen in Ni{sub 3}Al: Part 2, Mechanical testing of bicrystals

Year: 1994

Type: article

Abstract: To provide a sensitive measurement of the effect of boron segregation on the strength and ductility of Ni{sub 3}Al grain boundaries, bicrystal tensile tests were performed on small specimens of boron doped Ni{sub 76}Al{sub 24} cut from extremely large-grained boules. Five specimens with the same ``random`` or low-symmetry grain boundary (disorientations measured by means of backscattered Kikuchi patterns) and two specimens with a second random grain boundary were tested in quenched and slow-cooled conditions. Duplicate tests performed in a low (7 ppM) water-vapor environment showed that the fracture mode and the stress and strain at fracture are altered by environmental embrittlement at individual, partially strengthened grain boundaries.

Source: OSTI OAI (U.S. Department of Energy Office of Scientific and Technical Information)

Authors: Johnson, P. E., Gourdin, W., Gonis, A., Kioussis, N., Vaudin, M.

Institutions: Lawrence Livermore National Laboratory, California State University, Northridge

Language: English

Topic: Intermetallics and Advanced Alloy Properties

Subfield: Mechanical Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: green

Funders: U.S. Department of Energy, Lawrence Livermore National Laboratory

Awards: G1101028137, G1702950523, G3177268909, G6445123630, G660437508

OpenAlex ID: W2504193860

FWCI:

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