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Effect of grain size on creep of Ti-53.4mol%Al intermetallics at 1100 K

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Abstract

Constant stress creep under compression stress, 100 to 316 MPa, at 1100 K was investigated on single-phase TiAl intermetallics. The material was ingot-cast, isothermally forged, and then annealed to produce stable equi-axed grain structures, whose average grain diameters were 25, 42 and 70μm. Creep curves were very similar among the three specimens with different grain diameters and the creep rates at a given strain, as well as the minimum creep rates, depended little on grain size. Two regimes were observed on the stress dependence of the minimum creep rate. The stress exponent under high stresses was about 4.5, independent of grain size. Under stresses lower than about 150 MPa it became about 8.

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References

  1. 1.

    M. J. Blackburn andM. P. Smith, US Pat. 429 615, 13 October (1981).

  2. 2.

    H. A. Lipsitt, in “High-Temperature Ordered Intermetallic Alloys”, edited by C. C. Koch, C. T. Liu and N. S. Stoloff (Materials Research Society, Pittsburgh, 1985) p. 351.

  3. 3.

    H. A. Lipsitt, D. Shechtman andR. E. Schafrik,Metall. Trans. 6A (1975) 1991.

  4. 4.

    M. Nobuki, K. Hashimoto, T. Tsujimoto andY. Asai,Nippon Kinzoku Gakkai-shi (J. Jpn. Inst. Met.)50 (1986) 840.

  5. 5.

    S. Mitao, Y. Kohsaka andC. Ouchi, in “THER-MEC-88”, edited by I. Tamura (Iron Steel Institute Japan, Tokyo, 1988) p. 620.

  6. 6.

    P. L. Martin, M. G. Mendiratta andH. A. Lipsitt,Metall. Trans. 14A (1983) 2170.

  7. 7.

    T. Takahashi, H. Nagai andH. Oikawa,Nippon Kinzoku Gakkai-shi (J. Jpn Inst. Met.) 53 (1989) 471.

  8. 8.

    Idem, Mater. Sci. Engng. A114 (1989) 13.

  9. 9.

    H. Oikawa andT. G. Langdon, in “Creep Behaviour of Crystalline Solids”, edited by B. Wilshire and R. W. Evans (Pineridge Press, Swansea, 1985) p. 33.

  10. 10.

    H. Sato andH. Oikawa,Scripta Metall. 22 (1988) 87.

  11. 11.

    S. Nanba andH. Oikawa,Mater Sci. Engng. A 101 (1988) 31.

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Nagai, H., Takahashi, T. & Oikawa, H. Effect of grain size on creep of Ti-53.4mol%Al intermetallics at 1100 K. J Mater Sci 25, 629–632 (1990). https://doi.org/10.1007/BF00714087

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Keywords

  • Polymer
  • Grain Size
  • Compression Stress
  • High Stress
  • Creep Rate