Surface Nanocrystallization of Magnesium Alloy AZ91D by High-Energy Shot Peening
来源期刊：Journal Of Wuhan University Of Technology Materials Science Edition2009年第4期
论文作者：张津
文章页码：515 - 519
摘 要：High-energy shot peening （HESP）, a method to produce severe plastic deformation by high velocity flying balls, was applied on die cast magnesium alloy AZ91D. Effects of surface nanocrystallization by HESP and heat treatment at different temperatures were investigated. The microstructure evolution was conducted using X-ray diffraction （XRD） and field emission scanning electronic microscopy （FESEM）. The hardness was measured by microhardness tester. The experimental results show that surface nanocrystrallization of AZ91D obtained by HESP would lead to the increase of microhardness. Low temperature heated at 100 ℃ for 1 h do not change the property obviously. However, both the microstructure and microhardness vary greatly after heat treatment at 400 ℃ for 1 h.
张津
School of Materials Science & Engineering,University of Science and Technology BeijingCollege of Materials Science & Engineering,Chongqing University of Technology
摘 要：High-energy shot peening （HESP）, a method to produce severe plastic deformation by high velocity flying balls, was applied on die cast magnesium alloy AZ91D. Effects of surface nanocrystallization by HESP and heat treatment at different temperatures were investigated. The microstructure evolution was conducted using X-ray diffraction （XRD） and field emission scanning electronic microscopy （FESEM）. The hardness was measured by microhardness tester. The experimental results show that surface nanocrystrallization of AZ91D obtained by HESP would lead to the increase of microhardness. Low temperature heated at 100 ℃ for 1 h do not change the property obviously. However, both the microstructure and microhardness vary greatly after heat treatment at 400 ℃ for 1 h.
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