Lamellar orientation dependent anisotropy of fracture toughness in gamma-base titanium aluminide

Journal Article · Fri May 01 00:00:00 EDT 1992 · Scripta Metallurgica et Materialia; (United States)

DOI:https://doi.org/10.1016/0956-716X(92)90657-Z· OSTI ID:5006324

Mitao, S; Isawa, T; Tsuyama, S ^[1]

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1. NKK Corp., Advanced Technology Research Center, Kawasaki (Japan)

The effect of lamellar orientation on the fracture toughness of a gamma-base titanium aluminide (Ti-47.2 percent Al) alloy was investigated. Results of standard fracture toughness tests and SEM observations showed that fracture toughness on the plane parallel to alpha-2/gamma lamellae was low (at about 10 MPa sq rt m), while that on the plane perpendicular to the lamellae was at around 35 MPa sq rt m. Fracture on the plane parallel to the lamellae is considered to be due to interlamellar separation. 14 refs.

• OSTI ID: 5006324
• Journal Information: Scripta Metallurgica et Materialia; (United States), Vol. 26; ISSN 0956-716X
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM ALLOYS
FRACTURE PROPERTIES
TITANIUM ALLOYS
FCC LATTICES
FRACTURE MECHANICS
HCP LATTICES
INTERMETALLIC COMPOUNDS
ORIENTATION
ALLOYS
CRYSTAL LATTICES
CRYSTAL STRUCTURE
CUBIC LATTICES
HEXAGONAL LATTICES
MECHANICAL PROPERTIES
MECHANICS
360103* - Metals & Alloys- Mechanical Properties