Mechanical properties and microstructures of a wrought AZ91 alloy
来源期刊：Rare Metals2004年第3期
论文作者：YAN Yunqi, ZHANG Tingjie, ZHOU Lian, and DENG Ju Titanium Research Center, Northwest Institute for Nonferrous Metal Research, Xi’an , China
文章页码：220 - 225
摘 要：<正> Effects of hot plastic deformation on microstmctures and tensile properties of AZ91 alloy were investigated. Compared with as-T4 microstructures, the as-extruded samples of AZ91 alloy with fine grains exhibit better strength and ductility due to dynamic recrystallization. The succeeded rotation forging also provides freer grains while the strength increases, but the elongation decreases. Simultaneously, wrought AZ91 alloy shows more balance properties than as-T4 condition ones. An interesting elongation of 228.5% is attained in the as-extruded AZ91 alloy in spite of the coarse grains with the size of 85μm. The two-step method enhances the superplastic property of AZ91 alloy. The microstructure is still keeping the same scale of grains after superplastic testing.
YAN Yunqi, ZHANG Tingjie, ZHOU Lian, and DENG Ju Titanium Research Center, Northwest Institute for Nonferrous Metal Research, Xi’an 710016, China
摘 要：<正> Effects of hot plastic deformation on microstmctures and tensile properties of AZ91 alloy were investigated. Compared with as-T4 microstructures, the as-extruded samples of AZ91 alloy with fine grains exhibit better strength and ductility due to dynamic recrystallization. The succeeded rotation forging also provides freer grains while the strength increases, but the elongation decreases. Simultaneously, wrought AZ91 alloy shows more balance properties than as-T4 condition ones. An interesting elongation of 228.5% is attained in the as-extruded AZ91 alloy in spite of the coarse grains with the size of 85μm. The two-step method enhances the superplastic property of AZ91 alloy. The microstructure is still keeping the same scale of grains after superplastic testing.
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