The effect of processing on the hot workability of Ti-48Al-2Nb-2Cr alloys

Journal Article · Mon Dec 01 04:00:00 EST 1997 · Metallurgical and Materials Transactions. A, Physical Metallurgy and Materials Science

DOI:https://doi.org/10.1007/s11661-997-0012-y· OSTI ID:590061

Fuchs, G E ^[1]

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1. Lockheed Martin Corp., Schenectady, NY (United States)

The hot compression behavior and microstructure evolution of ingot metallurgy (I/M) and powder metallurgy (P/M) processed samples of the near-{gamma} Ti-aluminide alloy, Ti-48Al-2Nb-2Cr (at. pct), were determined. Three I/M conditions and two P/M conditions were examined in this study. Hot compression tests were performed in the temperature range of 1,100 C to 1,300 C at strain rates ranging from 1.67 {times} 10{sup {minus}1}/s to 1.67 {times} 10{sup {minus}4}/s. The P/M materials consolidated by either hot isostatic pressing (hipping) or extrusion exhibited the best hot workability in most cases. The P/M materials possessed finer, more homogeneous microstructures than the I/M materials. It was also noted that improved workability was observed in materials with equiaxed microstructures without any lamellar constituents.

• Sponsoring Organization: USDOE
• OSTI ID: 590061
• Journal Information: Metallurgical and Materials Transactions. A, Physical Metallurgy and Materials Science, Journal Name: Metallurgical and Materials Transactions. A, Physical Metallurgy and Materials Science Journal Issue: 12 Vol. 28; ISSN 1073-5623; ISSN MMTAEB
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM ALLOYS
CHROMIUM ALLOYS
HEAT RESISTING ALLOYS
HOT WORKING
MICROSTRUCTURE
NIOBIUM ALLOYS
TITANIUM ALLOYS