Effects of R-ratio on fatigue crack growth in a Ti-24Al-11Nb alloy

Journal Article · Sat May 15 00:00:00 EDT 1993 · Scripta Metallurgica et Materialia; (United States)

DOI:https://doi.org/10.1016/0956-716X(93)90466-6· OSTI ID:6520525

Bae, K ^[1]; Nelson, H G ^[2]

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1. Univ. of Suwon (Korea, Republic of)
2. NASA, Moffet Field, CA (United States)

Although a number of studies on the mechanical properties of Ti[sub 3]Al-based alloys have been conducted, limited data on the fatigue behavior have been reported. More specifically, there is very little information on the microscopic mechanisms of fatigue crack growth (FCG), despite the fact that the damage tolerance in titanium aluminide intermetallics is the subject of considerable concern. The objective of the present investigation is to study the microscopic fatigue crack growth behavior in a Ti-24Al-11Nb alloy. Special attention was given to the path of the fatigue crack through the microstructure, fracture mode and effects of R-ratio and crack closure on the fatigue crack growth behavior.

• OSTI ID: 6520525
• Journal Information: Scripta Metallurgica et Materialia; (United States), Journal Name: Scripta Metallurgica et Materialia; (United States) Vol. 28:10; ISSN 0956-716X; ISSN SCRMEX
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360103* -- Metals & Alloys-- Mechanical Properties
AEROSPACE INDUSTRY
ALLOYS
ALUMINIUM ALLOYS
CRACK PROPAGATION
CRYSTAL STRUCTURE
DATA
EXPERIMENTAL DATA
FATIGUE
FRACTURE PROPERTIES
INDUSTRY
INFORMATION
INTERMETALLIC COMPOUNDS
MECHANICAL PROPERTIES
MICROSTRUCTURE
NIOBIUM ALLOYS
NUMERICAL DATA
TITANIUM ALLOYS
TITANIUM BASE ALLOYS