Deformation behavior and internal stress of icosahedral Al-Pd-Mn with decagonal phase lamellae at elevated temperatures

H. Hirai, T. Tomita, F. Yoshida, H. Nakashima

Research output: Contribution to journalConference articlepeer-review

1 Citation (Scopus)

Abstract

Fine decagonal phase lamellae-bearing icosahedral Al-Pd-Mn quasicrystals were tested compressionally at temperatures of 997 to 1073 K and initial strain rate of 3 × 10-5 to 1 × 10-4 s-1, and stress relaxation tests were performed at various stages of deformation. The results confirmed the thermally activated nature of deformation, and the stress exponent of strain rate was around 4. Internal stress for deformation estimated by Kikuchi's method reached 50 to 90% of applied stress. The effective stress exponent of strain rate was revealed to be about 1.3. At least a part of high internal stress was attributable to complicated dislocation microstructure.

Original languageEnglish
Pages (from-to)331-336
Number of pages6
JournalMaterials Research Society Symposium - Proceedings
Volume553
Publication statusPublished - 1999
EventProceedings of the 1998 MRS Fall Meeting - The Symposium 'Advanced Catalytic Materials-1998' - Boston, MA, USA
Duration: Nov 30 1998Dec 3 1998

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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