The Proceedings of Conference of Kansai Branch
Online ISSN : 2424-2756
2003.78
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Effect of micro structure on initiation and growth behavior of small fatigue cracks in ultra fine-grained P/M Aluminum alloys
Atsushi SUGETAMasahiro JONOYoshihiko UEMATSUMunehiro YASUDA
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CONFERENCE PROCEEDINGS FREE ACCESS

Pages _1-7_-_1-8_

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Abstract
Reversed plane bending fatigue tests were conducted for two kinds of fine-grained Aluminium alloys (Nano aluminium) different in micro structures. The effect of specimen collection orientation was also investigated using totaly four kinds of specimens. Initiation and initial growth behavior of small fatigue crack were observed by means of plastic replicas technics. It was found that either inclusions or weak boundary between powders were responsible for fatigue crack initiation depending on the materials. Hardly any difference was found in crack growth behavior among those materials.
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© 2003 The Japan Society of Mechanical Engineers
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