ISSN:
1662-9752
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
An In Situ observation was made on rolled sheet Mg-Al-Zn alloy (AZ31) in SEM. A typeof mini-tensile specimens was used in three typical material orientations, RD (Rolling direction), 45(45 degrees to rolling direction) and TD (transverse direction, 90 degrees to rolling direction). It isfound that the plastic deformation occurred unevenly and limited in single grains, shown by microextruding steps at grain boundaries. Further deformation concentrated at twinning bands and grainboundaries, more and finer twinning bands appeared as secondary twins on the original ones. Indifferent orientations the dislocation slipping mechanism within twinning bands seems to play arole in different degrees. In RD specimens the slipping mechanism seems predominant, whereas inTD specimens the twinned steps were obvious. Micro cracks nucleated at internal interfaces: grainboundaries, interfaces of twinning bands, and intersections of twinning bands as well
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/15/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.539-543.1669.pdf
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