(19)
(11) EP 1 889 939 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
29.10.2008 Bulletin 2008/44

(43) Date of publication A2:
20.02.2008 Bulletin 2008/08

(21) Application number: 07253127.0

(22) Date of filing: 09.08.2007
(51) International Patent Classification (IPC): 
C22F 1/18(2006.01)
C22F 1/04(2006.01)
 C22C 14/00(2006.01)
C22C 21/00(2006.01)
(84) Designated Contracting States:
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC MT NL PL PT RO SE SI SK TR
Designated Extension States:
AL BA HR MK RS

(30) Priority: 19.08.2006 GB 0616566

(71) Applicant: Rolls-Royce plc
London SW1A 2HB (GB)

(72) Inventors:
  • Huang, Aijun
    Harborne, Birmingham B17 0PP (GB)
  • Loretto, Michael
    Edgbaston, Birmingham B15 3UG (GB)
  • Wu, Xinhua
    Northfield, Birmingham, B31 2BE (GB)
  • Hu, Dawei
    Birmingham B31 2DA (GB)

(74) Representative: Gunn, Michael Alan 
Rolls-Royce plc P.O. Box 31
Derby DE24 8BJ
Derby DE24 8BJ (GB)

   


(54) An alloy and method of treating titanium aluminide


(57) A method of treating a titanium aluminide alloy having a single alpha phase field and being capable of producing a massively transformed gamma microstructure by subjecting the alloy to a temperature cycle that produces the massively transformed microstructure having a refined microstructure; the method being characterised in that oxygen securing means are provided within the alloy to prevent diffusion of oxygen to the grain boundary.







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