Improvement of the creep properties of TiAl alloys densified by Spark Plasma Sintering

• Published in: Intermetallics Vol. 46; pp. 1 - 3
• Main Authors: Jabbar, Houria, Monchoux, Jean-Philippe, Thomas, Marc, Pyczak, Florian, Couret, Alain
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.03.2014; Elsevier
• Subjects: A. Titanium aluminides, based on TiAl; Alloys; Aluminides; B. Mechanical properties at high temperatures; C. Powder metallurgy, including consolidation; Creep (materials); D. Microstructure; Intermetallic compounds; Intermetallics; Physics; Spark plasma sintering; Titanium aluminides; Titanium base alloys; Titanium compounds; D. Microstructure; B. Mechanical properties at high temperatures; C. Powder metallurgy, including consolidation; A. Titanium aluminides, based on TiAl; including consolidation; Creep properties; Creep; Duplex microstructures; Mechanical properties; Mechanical properties at high temperatures; Powder metallurgy; Titanium alloys; Spark plasma sintering; based on TiAl; TiAl alloy; Titanium aluminides; Microstructure
• ISSN: 0966-9795; 1879-0216
• DOI: 10.1016/j.intermet.2013.10.019

Thermal treatments are applied to PM TiAl alloys elaborated by Spark Plasma Sintering with the aim to improve their creep properties. Duplex microstructures are generated and characterized. Microstructures and mechanical properties of G4 and TNB duplex alloys processed by Spark Plasma Sintering. (a) and (b): Duplex microstructures of the G4 and TNB alloys, respectively (c): Tensile curves at room temperature illustrating the high ductility and strength (d): Creep curves at 700 °C and 300 MPa showing the low creep rate and the long life time. [Display omitted]