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Lookup NU author(s): Dr George Kotsikos
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In the present work, the nanoindentation technique was utilized to evaluate hardness and reduced modulus evolution at nano-scale of a AZ31 magnesium alloy and a AA5083 - H111 aluminum alloy. Nanoindentation data were used to quantify the transition from elastic to plastic deformation of the two materials and calculate the stored energy while load-unloading testing of AZ31 and AA5083 alloys. The hexagonal close-packed structure of the AZ31 alloy and the resulting difficulty of the activation of five independent slip systems required for homogeneous plastic deformation were considered to determine the high stress sensitivity of the rolled AZ31 alloy, compared to AA5083 alloy, under the investigated loading conditions. The onset of plasticity for both alloys was defined, followed by pile-up and sink-in deformation mechanism investigation.
Author(s): Skarmoutsou A, Koumoulos EP, Kotsikos G, Pantelis DI, Robinson M, Pantelakis GSp, Charitidis CA
Publication type: Conference Proceedings (inc. Abstract)
Publication status: Published
Conference Name: 3rd International Conference of Engineering Against Failure (ICEAF 2013)
Year of Conference: 2013
Publisher: Laboratory of Technology and Strength of Materials, University of Patras
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