A morphology observation of β-Mg17Al12 phase in AZ80 magnesium alloy subjected to hot compression deformation under different conditions
The precipitation mechanism of secondary-precipitated phase β in AZ80 magnesium alloy during the hot compression deformation under different temperature was investigated. The results show that there are β-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. β-Mg17Al12 phases were directly deformed and broken to be strip form during the compression under 200, 250, 300 and 350℃. 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 β-Mg17Al12 phases precipitated in the alloy deformed under higher temperature such as 350 and 400℃ during the water cooling after the compression, the high power observation of which is fine and tightly lamellar microstructure. Compared with coarse reticular β-Mg17Al12 phases in the as-cast microstructure of AZ80 alloy, the morphology of β-Mg17Al12 phases precipitated during the hot compression has obvious improvement.
AZ80 magnesium alloy hot compression deformation β-Mg17Al12 phase
YANG Ya-qin ZHANG Zhi-min LI Bao-cheng
College of Materials Science and Engineering, North University of China, Taiyuan 030051, China
国际会议
11th IUMRS International Conference in Asia(第十一届国际材联亚洲材料大会 IUMRS-ICA 2010)
青岛
英文
6-10
2010-09-25（万方平台首次上网日期，不代表论文的发表时间）