A morphology observation of beta-Mg17Al12 phase in AZ80 magnesium alloy subjected to hot compression deformation under different conditions

作者：Yang Ya qin^*; Zhang Zhi min; Li Bao cheng

来源：11th International Conference in Asia of the International-Union-of-Materials-Research-Societies, 2010-09-25 to 2010-09-28.

DOI：10.4028/www.scientific.net/MSF.686.6

• AZ80 magnesium alloy
• hot compression deformation
• beta-Mg17Al12 phase

The precipitation mechanism of secondary-precipitated phase beta in AZ80 magnesium alloy during the hot compression deformation under different temperature was investigated. The results show that there are beta-Mg17Al12 phases with different morphology and precipitation mechanism in the microstructure of AZ80 alloy deformed both in two-phase region, critical region and single-phase region. beta-Mg17Al12 phases were directly deformed and broken to be strip form during the compression under 200, 250, 300 and 350 degrees C. A lot of fine granular second phase particles precipitated with the grain refinement simultaneously in AZ80 alloy deformed in two-phase region with tremendous deformation. There are also fine granular second phase particles precipitated in the alloy deformed in critical region. There are massive beta-Mg17Al12 phases precipitated in the alloy deformed under higher temperature such as 350 and 400 degrees C during the water cooling after the compression, the high power observation of which is fine and tightly lamellar microstructure. Compared with coarse reticular beta-Mg17Al12 phases in the as-cast microstructure of AZ80 alloy, the morphology of beta-Mg17Al12 phases precipitated during the hot compression has obvious improvement.

• 出版日期2011
• 单位中北大学