Effect of Second-Phase Particles on Grain Refinement of Mg-Al-Zn Alloy during ECAE

Abstract:

The effect of second-phase particles on the grain refinement of AZ61 and AZ91 Mg-Al-Zn alloys with different volume fractions of β-Mg17Al12 phase particles during equal channel angular extrusion (ECAE) has been investigated. The microstructure were observed by optical microscopy (OM), scanning electron microscopy (SEM) and transmission electron microscopy (TEM), which revealed that grain refinement was enhanced by second phase particles at initial stage of ECAE. And finer grains with the high angle grain boundaries (HAGBs) and disperse second-phase particles could be obtained in AZ61 and AZ91 after 8 passes of ECAE.

• Periodical: Materials Science Forum (Volumes 546-549)
• Pages: 315-318
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.546-549.315
• Online since: May 2007
• Authors: Li Jin, Dong Liang Lin, Xiao Qin Zeng, Da Li Mao, Wen Jiang Ding
• Keywords: Equal Channel Angular Extrusion (ECAE), Grain Refinement, Mg-Al-Zn Magnesium Alloy, Second Phase

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