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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 752-753Residual Stress Effects on Fatigue Crack Growth in...

Residual Stress Effects on Fatigue Crack Growth in Directionally Solidified YAG/Spinel Eutectics

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Abstract:

In this paper, yttrium aluminum garnet-magnesium aluminate spinel with good mechanical strength was fabricated by directional solidification, and its microstructure and mechanical properties were investigated. MgAl₂O₄-Y₃Al₅O₁₂ eutectic rods were grown by a float zone method. The composition of the grown ingots was determined by the X-ray diffraction technique and electron probe microanalysis. The crack growth characteristics were examined in directionally solidified YAG/spinel eutectics. The residual stresses were determined in MgAl₂O₄/Y₃Al₅O₁₂ eutectics using piezospectrosocopic probes. The crack growth behaviors show that residual stresses play a key role in the crack growth.

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Periodical:

Applied Mechanics and Materials (Volumes 752-753)

Pages:

263-267

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.752-753.263

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Online since:

April 2015

Authors:

Serkan Abali*

Keywords:

Fatigue Crack Growth, Floating Zone Technique, Magnesium Aluminate Spinel, Yttrium Aluminum Garnet

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© 2015 Trans Tech Publications Ltd. All Rights Reserved

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