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Behavior of surface and corner cracks subjected to tensile and bending loads in Ti-6Al-4V alloyThe behavior of part-through flaws with regard to failure under monotonic loading and their growth under fatigue loading was studied experimentally and analytically. Comparisons are made of experimental values of toughness obtained using surface and corner cracked specimens with those obtained using standard test specimens, and also experimental growth cycles were compared with numerical predictions using the NASA/FLAGRO computer program. Tests were conducted on various types of surface and corner cracks under tensile and bending loads. Room temperature lab air provided the test environment. The material used in this study was the Ti-6Al-4V alloy in the solution treated and aged (STA) and stress relieved condition. Detailed tabulation of the fracture toughness data and results of life prediction using the NASA/FLAGRO program are presented. Fatigue crack growth rates for the part-through cracked specimens are compared with a base curve fitted from the data obtained using standard specimens. The fatigue loading used in the crack growth testing was constant-amplitude sinusoidal type.
Document ID
Document Type
Technical Memorandum (TM)
Forman, Royce G.
(NASA Lyndon B. Johnson Space Center Houston, TX., United States)
Mettu, Sambi R.
(Lockheed Engineering and Sciences Co. Houston, TX., United States)
Date Acquired
September 6, 2013
Publication Date
September 1, 1990
Subject Category
Metallic Materials
Report/Patent Number
NAS 1.15:102165
Accession Number
Distribution Limits
Work of the US Gov. Public Use Permitted.
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