Journal of Materials Science

, Volume 25, Issue 1, pp 629–632 | Cite as

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

  • Hashiru Nagai
  • Tohru Takahashi
  • Hiroshi Oikawa
Article

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.

Keywords

Polymer Grain Size Compression Stress High Stress Creep Rate 

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Copyright information

© Chapman and Hall Ltd. 1990

Authors and Affiliations

  • Hashiru Nagai
    • 1
  • Tohru Takahashi
    • 1
  • Hiroshi Oikawa
    • 1
  1. 1.Department of Materials Science, Faculty of EngineeringTohoku UniversitySendaiJapan

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