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Mechanical Behavior and Residual Stresses in AZ31 Wrought Magnesium Alloy Subjected to Four Point Bending

  • Several specimens of AZ31 magnesium alloy were taken in different directions from a rolled plate and subjected to tensile, compressive and four-point bending tests. Tensile and compressive tests allowed to characterize the mechanical properties of the material in the rolling and cross rolling directions. The bending tests were carried out in four different specimen types to take the effect of the anisotropy induced by the rolling procedure itself into account. Six strain gages per specimen allowed to observe the evolution of the strain with the bending moment during the tests. All bending specimens were bent until a total compressive deformation of 2.5 %. It was observed that the corresponding tensile strain was significant lower and slightly different for each specimen type. In addition, a characteristic non-uniform distribution of deformation twinning was observed. The induced residual stresses after bending were characterized by X-ray diffraction (XRD) and incremental hole-drilling (IHD). Due to the different mechanical behavior in tension and compression, an asymmetric residual stress distribution after bending could be observed. The neutral axis was, in all cases, shifted towards the tensile side. This observation agrees with the strain measurements during bending tests.

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Metadaten
Author:J. P. Nobre, Ulf Noster, J. Gibmeier, Igor Altenberger, M. Kornmeier, A. Dias, Berthold Scholtes
DOI:https://doi.org/10.1002/3527607552.ch53
ISBN:9783527607556
Parent Title (English):Magnesium Alloys and Their Applications
Publisher:Wiley
Place of publication:Hoboken
Editor:Karl U. Kainer
Document Type:Part of a Book
Language:English
Year of first Publication:2006
Release Date:2023/12/06
First Page:336
Last Page:341
Institutes:Fakultät Maschinenbau
Technologie-Campus Parsberg-Lupburg
Fakultät Maschinenbau / Labor Werkstoffrandschichtanalytik
Publication:Externe Publikationen
Licence (German):Keine Lizenz - Es gilt das deutsche Urheberrecht: § 53 UrhG