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Open Access item Effect of the LPSO volume fraction on the microstructure and mechanical properties of Mg–Y2X–ZnX alloys

Authors:Oñorbe, Elvira
Garcés, Gerardo
Pérez Zubiaur, Pablo
Adeva, Paloma
Keywords:LPSO volume fraction, Mg–Y2X–ZnX alloys, Microstructures, Mechanical properties
Issue Date:2012
Publisher:Springer
Citation:Journal of materials science 47( 2) : 1085-1093 (2012)
Abstract:The influence of the volume fraction of longperiod stacking ordered structure (LPSO) on the microstructure and mechanical properties in three extruded Mg100-3xY2xZnx alloys (x = 0.5, 1 and 1.5 at.%) has been studied. Two structures of LPSO phase coexist in these extruded alloys, 18R and 14H. The 18R structure transforms to 14H structure gradually in the course of the extrusion process. For the three alloys, the grain size in the vicinity of LPSO phase particles is refined because of a particle-stimulated nucleation (PSN) mechanism. The reinforcing effect of the LPSO phase is active up to 523 K. Above this temperature, grain size effect becomes important. Accordingly, MgY1Zn0,5 extruded alloy shows the Highest mechanical strength for temperatures greater than 523 K.
Publisher version (URL):http://dx.doi.org/10.1007/s10853-011-5899-4
URI:http://hdl.handle.net/10261/56078
ISSN:0957-4530
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