Advances in Gammalloy Materials–Processes–Application Technology: Successes, Dilemmas, and Future

For the last several years, gamma titanium aluminide ( γ -TiAl)-based alloys, called “gammalloys,” in specific alloy-microstructure forms began to be implemented in civil aero-engines as cast or wrought low-pressure turbine (LPT) blades and in select ground vehicle engines as cast turbocharger rotor...

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Bibliographic Details
Published in:JOM (1989) Vol. 70; no. 4; pp. 553 - 560
Main Authors: Kim, Young-Won, Kim, Sang-Lan
Format: Journal Article
Language:English
Published: New York Springer US 01.04.2018
Springer Nature B.V
Subjects:
Aerospace engines
Alloys
Aviation
Chemistry/Food Science
Ductility
Earth Sciences
Engine valves
Engineering
Engines
Environment
Grain boundaries
High temperature
Intermetallic compounds
Microstructure
Physics
R&D
Research & development
Retention
Rotors
Technical Communication
Titanium aluminides
Titanium base alloys
Turbine blades
Beijing China
Ohio
Pittsburgh Pennsylvania
United States > US
China
ISSN:1047-4838, 1543-1851
Online Access:Get full text
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Summary:For the last several years, gamma titanium aluminide ( γ -TiAl)-based alloys, called “gammalloys,” in specific alloy-microstructure forms began to be implemented in civil aero-engines as cast or wrought low-pressure turbine (LPT) blades and in select ground vehicle engines as cast turbocharger rotors and wrought exhaust valves. Their operation temperatures are approximately up to 750°C for LPT blades and around 1000°C for turbocharger rotors. This article critically assesses current engineering gammalloys and their limitations and introduces eight strengthening pathways that can be adopted immediately for the development of advanced, higher temperature gammalloys. Intelligent integration of the pathways into the emerging application-specific research and development processes is emphasized as the key to the advancement of the gammalloy technology to the next higher engineering performance levels.
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ISSN:1047-4838
1543-1851
DOI:10.1007/s11837-018-2747-x