ISSN:
1662-9779
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Physics
Notes:
Mechanical behavior of processed AZ91D magnesium alloy by equal channel angularextrusion during semi-solid isothermal compression was investigated using semi-solid isothermalcompression test. The results show that there are four stages, drastic increase of true stress, drasticfalling of true stress, steady stage and increase of true stress. With the increase of holding time ordeformation temperature, required true stress for obtaining same true strain falls evidently and peakstress and steady stress also fall in true stress-strain curve. With increasing strain rate, steady stressalso increase. Peak stress will increase or decrease with the sudden increase or fall of strain rate.During semi-solid isothermal compression, plastic deformation of semi-solid billet mainly dependson plastic deformation of solid phases and their rotation and sliding. Coarse grains occur in upperposition adjacent to compression die’s surface and fine grains occur in the central and free surfacepositions of billets
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/22/transtech_doi~10.4028%252Fwww.scientific.net%252FSSP.116-117.530.pdf
