Home Phase Stability of Hard Alpha in Ti-64 and Ti-17
Article
Licensed
Unlicensed Requires Authentication

Phase Stability of Hard Alpha in Ti-64 and Ti-17

  • Bernard P. Bewlay and Michael F. X. Gigliotti
Published/Copyright: January 3, 2022
Become an author with De Gruyter Brill
Author Information
International Journal of Materials Research
From the journal International Journal of Materials Research Volume 89 Issue 9

Abstract

The present paper describes phase stability of nitrogen-containing defects in Ti-64 and Ti-17, and the effect of nitrogen on the chemistry of the titanium nitride, αTi and βTi phases in these alloys. Ti-64 and Ti-17 were alloyed with nitrogen in a controlled manner by vacuum arc melting of alloying elements together with δTiN powder. Nitrogen was substituted for all elements proportionately using their compositions in atom per cent. Nitrogen concentrations of 18 and 7 at.% were investigated. Microstructural examinations and electron beam microprobe analysis of δTiN, αTi, and βTi within the Ti-64 and Ti-17 alloyed with nitrogen and heat treated at both 1300 °C and 1000 °C are described. The phase chemistries of αTi and βTi modified with nitrogen are compared with chemistries of the same phases without nitrogen. The addition of nitrogen to both Ti-64 and Ti-17 reduces the solubility of A1 in αTi to a degree that the concentration of A1 in αTi is less than that in βTi. Mo and Cr (in Ti-17) and V (in Ti-64) partitioning to βTi is also increased in both Ti-17 and Ti-64 modified with nitrogen. The degree of partitioning increases with increasing nitrogen concentration.

Bernard P. Bewlay and Michael F. X. Gigliotti General Electric Company Corporate Research and Development P.O. Box 8 Schenectady. N.Y. 12301. USA

Literature

1. Buttrill, W.H.; Shamblen, C.E.: Proc. of the 8th Internat. Conf. on Titanium, Titanium ’95, in: PA. Blenkinsop, W.J. Evans and H.M. Flower (eds). The Institute of Materials, London (1996) 1446– 1453.Search in Google Scholar

2. Martin, P.; Herteman, J-R.: Proc. of the 7th Internat. Conf. on Titanium, Titanium ’92, in: F.H. Froes and I. Caplan (eds.). The Minerals, Metals and Materials Society, Warrendale, PA (1993) 2805–2818.Search in Google Scholar

3. Shamblen, C.E.: Proc. of the 8th Internat. Conf. on Titanium, Titanium ’95, in: PA. Blenkinsop, W.J. Evans and H.M. Flower (eds.), The Institute of Materials, London (1996) 1438–1445.Search in Google Scholar

4. Costa, J.G.; Gonzalez, R.E.; Guyott, R.E.; Salvano, D.P.; Swift, I.; Koenig, R.J.: Titanium Rotating Components Review Team Report, Engine and Propeller Directorate, Aircraft Certification Service, Federal Aviation Administration (1990).Search in Google Scholar

5. Cushman., J.H. Jr.: Doubts Voiced On Tests for Jet-Engine Cracks, in: New York Times, sec. A (19 June 1990) 20.Search in Google Scholar

6. Hughes, D.: Aviation Week & Space Technology 134 (1991) 35– 36.Search in Google Scholar

7. Wildey, J.F.: Focus on Mechanical Failures, in: Mechanism and Detection, IL: Vibration Institute Willowbrook, (1991) 3–12.Search in Google Scholar

8. Henry, J.L.; Hill, S.D.; Schalier, J.L.; Campbell, T.T.: Metall. Trans. 4 (1973) 1859–1864.10.1007/BF02665413Search in Google Scholar

9. Henry, J.L.; Hill, S.D.; Anable, W.E.; Schalier, J.L.: Source and Control of Nitride Inclusions in Titanium, BuMines RI 7933, Washington, DC: Bureau of Mines, United States Department of the Interior (1974).Search in Google Scholar

10. Wood, F.W.: Elimination of Low Density Inclusions in Titanium Alloy Ingots, AEML-TR-69-47, Wright-Patterson Air Force Base, OH: Air Force Materials Laboratory, Air Force Systems, Command (1969).Search in Google Scholar

11. Murray, J.L.: Phase Diagrams of Titanium Alloys, ASM International, Metals Park, OH (1987).Search in Google Scholar

12. Lengauer, W.: Acta metall. mater. 39 (1991) 2985 – 2996.10.1016/0956-7151(91)90031-USearch in Google Scholar

13. Massalski, T.B.: Binary Alloy Phase Diagrams, ASM, Metals Park, OH (1992).Search in Google Scholar

14. Handbook of Ternary Alloy Phase Diagrams, in: P. Villars, A. Prince, H. Okamoto (eds), ASM International, Materials Park, OH, 4 (1995) 4105–4108.Search in Google Scholar

15. Bars, J.P.; Etchessar, E.; Debuigne, J.: 6th World Conf. on Titanium, in: P. Lacombe; R. Tricot; G. Béranger (eds.), Les Editions de Physique, Les Ulis, France (1989) 1565–1570.Search in Google Scholar

16. Bars, J.P.; Guillou, A.; Debuigne, J.: 6th World Conf. on Titanium, in: P. Lacombe; R. Tricot; G. Béranger (eds), Les Editions de Physique, Les Ulis, France (1989) 1871–1876.Search in Google Scholar

17. Castro R.; Séraphin, J.: Mémoires Scientifiques Revue de Métallurgie LXni (1966) 1025–1058.Search in Google Scholar
Received: 1998-03-12
Published Online: 2022-01-03

© 1998 Carl Hanser Verlag, München

Articles in the same Issue

  1. Frontmatter
  2. Aufsätze
  3. Tracer Grain Boundary Diffusion of Silver in α-Zirconium Polycrystals
  4. Calorimetric Determination of the Enthalpy of Formation and the Description of the Constitutional Defects of the Ordered (Ni, Co)1–y Aly, Phase
  5. A Conceptual Modelling of the Tetragonality of L10 (AuCu-I type) Intermetallics
  6. Phase Stability of Hard Alpha in Ti-64 and Ti-17
  7. Phase Diagram Investigation of the Indium-Selenium System
  8. Evaluation of Five-component Phase Diagrams for the Analysis of Phase Composition in Al–Si Based Alloys
  9. The Formation of Interface Phases in the Diffusion Couple Ti–SiC
  10. Deformation Behavior of a Modified 9Cr–1Mo Steel Between 77 and 373 K
  11. The Strength of Ferrite in Annealed Armco Iron and Hypoeutectoid Steels
  12. Notched Strength of Fabric Composite Plates with a Circular Hole
  13. Mitteilungen der Deutschen Gesellschaft für Materialkunde e.V.
  14. Personen
  15. Veranstaltungen
  16. Buchbesprechung
https://doi.org/10.3139/ijmr-1998-0115

Articles in the same Issue

  1. Frontmatter
  2. Aufsätze
  3. Tracer Grain Boundary Diffusion of Silver in α-Zirconium Polycrystals
  4. Calorimetric Determination of the Enthalpy of Formation and the Description of the Constitutional Defects of the Ordered (Ni, Co)1–y Aly, Phase
  5. A Conceptual Modelling of the Tetragonality of L10 (AuCu-I type) Intermetallics
  6. Phase Stability of Hard Alpha in Ti-64 and Ti-17
  7. Phase Diagram Investigation of the Indium-Selenium System
  8. Evaluation of Five-component Phase Diagrams for the Analysis of Phase Composition in Al–Si Based Alloys
  9. The Formation of Interface Phases in the Diffusion Couple Ti–SiC
  10. Deformation Behavior of a Modified 9Cr–1Mo Steel Between 77 and 373 K
  11. The Strength of Ferrite in Annealed Armco Iron and Hypoeutectoid Steels
  12. Notched Strength of Fabric Composite Plates with a Circular Hole
  13. Mitteilungen der Deutschen Gesellschaft für Materialkunde e.V.
  14. Personen
  15. Veranstaltungen
  16. Buchbesprechung
Sign up now to receive a 20% welcome discount
Institutional Access
How does access work?
Have an idea on how to improve our website?
Please write us.
© 2025 De Gruyter Brill
Downloaded on 15.9.2025 from https://www.degruyterbrill.com/document/doi/10.3139/ijmr-1998-0115/html
Scroll to top button