Microstructure evolution during friction-stir welding of AZ31 magnesium alloy. (November 2015)

• Record Type: Journal Article
• Authors: Mironov, S.; Onuma, T.; Sato, Y.S.; Kokawa, H.
• Is Part Of: Acta materialia. Volume 100(2015)
• Page Start: 301
• Page End: 312
• Publication Date: 2015-11
• Subjects: Magnesium -- Friction-stir welding -- Electron-backscatter diffraction (EBSD) -- Microstructure -- Texture; Materials -- Periodicals; Materials science -- Periodicals; Materials -- Mechanical properties -- Periodicals; Metallurgy -- Periodicals; Chemistry, Inorganic -- Periodicals; 620.112
• DOI: 10.1016/j.actamat.2015.08.066
• Languages: English
• ISSNs: 1359-6454

Abstract

Graphical abstract: Abstract: The microstructure evolution of a typical hexagonal close-packed (HCP) material (AZ31 magnesium alloy) during friction stir welding was studied in a wide range of welding temperatures. In all cases, the grain structure development was found to be significantly influenced by the formation of a very strong {0 0 0 1} 〈 u w t v 〉 B-fiber texture. Due to limitations imposed by this texture as well as by symmetry of the HCP crystal structure, an extensive lowering of grain-boundary misorientation was found to occur during deformation.