Creep properties in TiO2 nanoparticle reinforced aluminum matrix composites

Jaehyuck Shin, Donghyun Bae

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Creep behaviors of the aluminum composites containing 3 vol% of TiO 2 nanoparticles (15 nm in size) are studied at 523 K. In the high stress region, the composites show enhanced creep resistance exhibiting high value of the apparent stress exponent and the high threshold stress, which is determined to be 162 MPa. The true stress exponent of minimum creep strain rate is found to be 5 implying the creep is controlled by lattice diffusion. Negligible stress dependence in the creep rate is found when the applied stresses are <200 MPa, since the creep behavior depends dominantly on the diffusional flows of the matrix that are strictly limited by the nanoparticles. Creep behaviors of the aluminum composites containing TiO2 nanoparticles are studied at 523 K. The composites show enhanced creep resistance exhibiting high value of the apparent stress exponent and the high threshold stress. The true stress exponent of minimum creep strain rate is found to be 5. Negligible stress dependence in the creep rate is found when the applied stresses are <200 MPa.

Original languageEnglish
Pages (from-to)1029-1033
Number of pages5
JournalAdvanced Engineering Materials
Volume15
Issue number11
DOIs
Publication statusPublished - 2013 Nov 1

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics

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