This research was supported by the Korea Science and Engineering Foundation Grant (No. 2012R1A1A2042329).
Creep Properties in TiO2 Nanoparticle Reinforced Aluminum Matrix Composites†
Article first published online: 21 JUN 2013
© 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Advanced Engineering Materials
Volume 15, Issue 11, pages 1029–1033, November 2013
How to Cite
Shin, J. and Bae, D. (2013), Creep Properties in TiO2 Nanoparticle Reinforced Aluminum Matrix Composites. Adv. Eng. Mater., 15: 1029–1033. doi: 10.1002/adem.201300099
- Issue published online: 4 NOV 2013
- Article first published online: 21 JUN 2013
- Manuscript Revised: 16 MAY 2013
- Manuscript Received: 25 MAR 2013
- Korea Science and Engineering Foundation. Grant Number: 2012R1A1A2042329
Creep behaviors of the aluminum composites containing 3 vol% of TiO2 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.