ISSN:
1662-9752
Quelle:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Thema:
Maschinenbau
Notizen:
Magnesium alloys show promise in meeting the demand for materials of lighter weight andhigher rigidity. Mg alloys are hard to process and normally require grain refining for improvedformability and mechanical properties. To process these fine-grained Mg alloys effectively, it isimportant to relate their load stress and mechanical properties to changes in their microstructures.Using a biaxial tensile machine and cruciform specimens, to evaluate the mechanical properties,microstructure, and plasticity, in a high temperature biaxial stress state, used of AZ31 Mg alloy sheet.With biaxial deformation, grain boundary slide occurred more frequently than with uniaxialdeformation, causing grain boundary separation and formation of micro-voids between the grains. Inthe vicinity of the cracks and at the locations of grain boundary separation, although deformationtemperature at higher than the recrystallization temperature, fine grains (about 2 )m) showing induplex grain structures were formed locally. The formation of duplex grain structures as a result oflocal formation of fine grains during the deformation process is a major issue to be solved from theviewpoint of plasticity processing
Materialart:
Digitale Medien
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/16/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.551-552.225.pdf
