PRECRACKED CHARPY IMPACT FRACTURE TOUGHNESS PROPERTIES OF BACKUP FLUX-WELDED TI-5AL-2.5 SN ALLOY PLATE FROM -320 F TO 550 F.
Abstract
A program was conducted to evaluate the effects of a proprietary backup fluxwelding technique on the impact fracture toughness properties of Ti-5Al-2.5 Sn alloy plate. Precracked Charpy (often called subsize Charpy) specimens were tested under impact loads at -320, -100, room temperature, and 550 F. The weld and heat affected zone (HAZ) had greater fracture toughness resistance than the base metal. The fracture resistance work per unit area (W/A) decreased with decreasing test temperature. At -320 F the weld and HAZ retained 1/3 of their fracture resistance at room temperature. However, the weld- and HAZ-converted W/A impact fracture resistance at -320 F had a K sub c about 125 ksi square root inch which indicated good toughness for this temperature. The fracture resistance did not appear to be a function of the specimen's location through the thickness of the plate for a given specimen orientation. In general, the fracture resistance of the weld and HAZ compared to the base metal was excellent.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1966
- Accession Number
- AD0481554
Entities
People
- Roger M. Niemi
- Sidney O. Davis.
Organizations
- Air Force Research Laboratory