Experimental Study on the Effects of Friction Stir Welding Parameters on the Quality and The Mechanical Properties Of The AZ91 Joints

  Sajjad Rouhi,  Mehrdad Ashjari,  Amir Mostafapour

The objective of the study was to characterize the properties of a magnesium alloy welded by friction stir welding. The results led to a better understanding of the relationship between this process and the microstructure and anisotropic properties of alloy materials. Welding principally leads to a large reduction in grain size in welded zones due to the phenomenon of dynamic recrystallization. The most remarkable observation was that crystallographic textures appeared from a base metal without texture in two zones: the thermo-mechanically affected and stir welded zones. The latter zone has the peculiarity of possessing a marked texture with two components on the basal plane and the pyramidal plane. These characteristics disappeared in the thermo-mechanically affected zone (TMAZ), which had only one component following the basal plane. These modifications have been explained by the nature of the plastic deformation in these zones, which occurs at a moderate temperature in the TMAZ and high temperature in the SWZ.

Keywords- friction stir welding, AZ91 alloy, mechanical properties

Unique Identification Number - IJEDR1502043
Page Number(s) - 234-239
Pubished in - Volume 3 | Issue 2 | May 2015
DOI (Digital Object Identifier) -    faculty of mechanical engineering of tabriz univercity- iran
Publisher - IJEDR (ISSN - 2321-9939)

  Sajjad Rouhi,  Mehrdad Ashjari,  Amir Mostafapour,   "Experimental Study on the Effects of Friction Stir Welding Parameters on the Quality and The Mechanical Properties Of The AZ91 Joints", International Journal of Engineering Development and Research (IJEDR), ISSN:2321-9939, Volume.3, Issue 2, pp.234-239, May 2015, Available at :http://www.ijedr.org/papers/IJEDR1502043.pdf