Three kinds of functionally graded tube using A390 alloy at various rotation speeds 400,700 and 1000 rpm with thickness of 2cm were produced by horizontal centrifugal casting, and their microstructure and mechanical properties were investigated and compared. Characteristics and distribution of the primary particles were assessed by the optical microscopy (OM), scanning electron microscopy (SEM), and image analyzer software. The hardness and pin-on-disk wear tests along the thickness of samples ...
مقاله جوشکاری با عنوان : Characterization of microstructure and deformation behaviour of resistance spot welded AZ31 magnesium alloy N. Kishore Babua, lowast;, S. Brauserb, M. Rethmeierb,c, C.E. Crossd چکیده : Resistance spot welds were prepared on 3 mm thick sheets of continuous cast and rolled AZ31 magnesiumalloy. The microstructure and composition analysis of weld nugget, heat affected zone (HAZ)and base metal were examined using optical and scanning electron ...