Wrought processing of ingot-metallurgy gamma titanium aluminide alloys

Conference · Sun Dec 31 00:00:00 EST 1995

OSTI ID:225125

Semiatin, S L ^[1]

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1. Wright Lab., Wright-Patterson AFB, OH (United States). Materials Directorate

The wrought processing of ingot-metallurgy, gamma titanium aluminide alloys is reviewed. Attention is focused on five major areas in the development of thermomechanical processes for these materials: (1) ingot structure and homogenization, (2) ingot breakdown via existing techniques, (3) novel processes for ingot breakdown, (4) secondary processing, and (5) process scaleup considerations. The nature of the cast microstructure and the influence of composition and ingot size on grain size and segregation are described. The design of existing processes for ingot breakdown deals with the selection of process variables and the design of cans for nonisothermal metalworking techniques. Novel breakdown processes, including smart forging, alpha forging, controlled dwell extrusion, and equal channel angular extrusion, are reviewed. In the area of secondary processing, developments related to pack rolling of sheet, superplastic sheet forming, and isothermal, closed-die forging are summarized. Lastly, scaleup considerations such as thermal cracking during ingot production are addressed.

• OSTI ID: 225125
• Report Number(s): CONF-950201-; ISBN 0-87339-304-X; TRN: IM9621%%55
• Resource Relation: Conference: Annual meeting and exhibition of the Minerals, Metals and Materials Society (TMS), Las Vegas, NV (United States), 12-16 Feb 1995; Other Information: PBD: 1995; Related Information: Is Part Of Gamma titanium aluminides; Kim, Y.W. [ed.] [UES, Inc., Dayton, OH (United States). Materials and Processes Div.]; Wagner, R. [ed.] [GKSS Research Center, Geesthacht (Germany). Inst. for Materials Research]; Yamaguchi, Masaharu [ed.] [Kyoto Univ. (Japan). Dept. of Materials Science and Engineering]; PB: 1023 p.
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
TITANIUM ALLOYS
THERMOMECHANICAL TREATMENTS
MICROSTRUCTURE
ALUMINIUM ALLOYS
NIOBIUM ALLOYS
CHROMIUM ALLOYS
MANGANESE ALLOYS
TANTALUM ADDITIONS
INTERMETALLIC COMPOUNDS
CASTING
SEGREGATION
GRAIN SIZE
FORGING
EXTRUSION
FINITE ELEMENT METHOD
STRAIN RATE
FLOW STRESS
ROLLING
PLASTICITY
THERMAL STRESSES