Weldability of a titanium aluminide

Journal Article · Fri Dec 01 04:00:00 EST 1989 · Welding Journal (Miami); (USA)

OSTI ID:6955964

Baeslack, III, W A ^[1]; Mascorella, T J ^[2]; Kelly, T J ^[3]

---

1. Dept. of Welding Engineering, The Ohio State Univ., Columbus, OH (US)
2. Moog Corp., East Aurora, NY (US)
3. GE Aircraft, Cincinnati, OH (US)

The authors report the weldability of an alpha-two titanium auuminide, Ti-13.5 wt-%Al-21.5 wt-%Nb (Ti-24 at.-%Al-11 at.-%Nb), investigated from a perspective of developing relationships between the weld cooling rate, microstructure, mechanical properties and fracture behavior. Dilatometry studies performed over a range of cooling rates from 1{degree} to 150{degrees}C/s(1.8{degrees} to 270{degrees}F/s) show a continuous decrease in the body-centered cubic (BCC) to hexagonal close-packed (HCP) transformation start temperature. Water quenching from above the beta transus temperature provided a rapid cooling rate of 750{degrees}C/s(1350 {degrees}F/s), which promoted complete retention of BCC beta phase. Implications of the continuous-cooling phase transformation study on the joining of Ti-13.5 wt-%Al-21.5 wt-%Nb using alternate welding processes are discussed.

• OSTI ID: 6955964
• Journal Information: Welding Journal (Miami); (USA), Journal Name: Welding Journal (Miami); (USA) Vol. 68:12; ISSN 0043-2296; ISSN WEJUA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360101* -- Metals & Alloys-- Preparation & Fabrication
360102 -- Metals & Alloys-- Structure & Phase Studies
360103 -- Metals & Alloys-- Mechanical Properties
ALLOYS
ALUMINIUM ALLOYS
CHEMICAL COMPOSITION
CRYSTAL STRUCTURE
DIFFUSION
DILATOMETRY
DUCTILITY
ELECTRON MICROSCOPY
FRACTOGRAPHY
GRAIN BOUNDARIES
MECHANICAL PROPERTIES
MICROSCOPY
MICROSTRUCTURE
NIOBIUM ALLOYS
PHASE TRANSFORMATIONS
SHEAR
SIMULATION
TENSILE PROPERTIES
THERMAL ANALYSIS
TITANIUM ALLOYS
TRANSMISSION ELECTRON MICROSCOPY
WELDABILITY