Janik, Vit, Hnilica, František, Smola, Bohumil, Stulíková, Ivana and Očenášek, Vladivoj. (2009) Microstructural investigation of the failure mechanisms after creep exposure of Mg–Y–Nd–Zn–Mn alloy. International Journal of Materials Research (formerly Zeitschrift fuer Metallkunde), Vol.100 (No.3). pp. 296-300. ISSN 1862-5282

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Abstract

Tensile creep tests of squeeze-cast Mg-3Y-2Nd-1Zn-1Mn (wt.%) magnesium alloy were performed at constant load. Measurement of grain-boundary sliding by observation of the offset of marker lines was carried out. The role of mutual orientation of neighbor dendrites and possible influence of active slip systems inside dendrites on the cavity nucleation was investigated by electron backscatter diffraction. Experimental results show that creep failure in this alloy takes place by continuous nucleation, growth, and coalescence of cavities on dendritic boundaries. A nucleation mechanism involving stress concentrations due to slip inside the grains is not probable. Additionally, although the total extent of deformation due to grain boundary sliding is small, the contribution of sliding to the origin of required stress concentrations necessary for cavity nucleation cannot be excluded.

Item Type:	Journal Article
Subjects:	T Technology > TN Mining engineering. Metallurgy
Divisions:	Faculty of Science > WMG (Formerly the Warwick Manufacturing Group)
Journal or Publication Title:	International Journal of Materials Research (formerly Zeitschrift fuer Metallkunde)
Publisher:	Carl Hanser Verlag GmbH & Co. KG
ISSN:	1862-5282
Date:	March 2009
Volume:	Vol.100
Number:	No.3
Page Range:	pp. 296-300
Identification Number:	10.3139/146.110035
Status:	Not Peer Reviewed
Publication Status:	Published
Access rights to Published version:	Restricted or Subscription Access
URI:	http://wrap.warwick.ac.uk/id/eprint/46939

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