Accession Number:

ADA379812

Title:

Fatigue Behavior of SIC Reinforced Titanium Composites

Descriptive Note:

Technical memorandum

Corporate Author:

NATIONAL AERONAUTICS AND SPACE ADMINISTRATION CLEVELAND OH LEWIS RESEARCH CENTER

Personal Author(s):

• Bhatt, R. T.
• Grimes, H. H.

Report Date:

1979-05-23

Pagination or Media Count:

21.0

Abstract:

The low cycle axial fatigue properties of 25 and 44 fiber volume percent SiCTi6Al-4V composites were measured at room temperature and at 650 degrees C. At room temperature, the S-N curves for the composites showed no anticipated improvement over bulk matrix behavior. Although axial and transverse tensile strength results suggest a degradation in SiC fiber strength during composite fabrication, it appears that the poor fatigue life of the composites was caused by a reduced fatigue resistance of the reinforced Ti6Al-4V matrix.

Descriptors:

• *FATIGUE(MECHANICS)
• *SILICON CARBIDES
• TENSILE STRESS
• METAL MATRIX COMPOSITES
• FRACTURE(MECHANICS)
• RESIDUAL STRESS
• TITANIUM

Subject Categories:

• Laminates and Composite Materials
• Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE