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On some characteristics of microstructure and defects in die-cast magnesium components
Jönköping University, School of Engineering, JTH, Mechanical Engineering. Jönköping University, School of Engineering, JTH. Research area Component Technology.
2005 (English)In: Materials Science Forum, ISSN 0255-5476, E-ISSN 1662-9752, Vol. 488-489, p. 283-286Article in journal (Refereed) Published
Abstract [en]

A mapping of fatigue crack growth rates in thick plates of a high strength aluminium alloy has been done. The plate thicknesses investigated was 100, 150 and 200 mm. In this work, material from near edge at near surface and mid-thickness has been investigated.

Measurements of crack length has been performed using DC potential drop. Cyclic condensation is used in order to reveal crack growth behaviour for stage I and the earlier part of stage II crack growth.

Influence of crack closure, crack branching and slow growing side cracks on fatigue crack growth rate of S-L and L-T oriented specimens are discussed. Variation of difference in growth rate in the upper part of the stage II growth between near surface and mid thickness positioned L-T specimens are found to vary with plate thickness.

Place, publisher, year, edition, pages
2005. Vol. 488-489, p. 283-286
Keywords [en]
Aluminum base alloys; Mechanical properties; Fatigue failure; Crack propagation; Al Zn Mg Cu alloys
Identifiers
URN: urn:nbn:se:hj:diva-4888OAI: oai:DiVA.org:hj-4888DiVA, id: diva2:35708
Available from: 2008-07-09 Created: 2008-07-09 Last updated: 2017-12-12Bibliographically approved

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Cao, Haiping

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