The evolution of texture during the annealing and hot rolling process of extruded AZ31 magnesium alloy sheets was studied. There are two kinds of texture components in the extruded AZ31 sheets. One is {0002}<1010&g...The evolution of texture during the annealing and hot rolling process of extruded AZ31 magnesium alloy sheets was studied. There are two kinds of texture components in the extruded AZ31 sheets. One is {0002}<1010> and the other is {1010}<1120>. The {0002}<1010>component predominates. After annealing at 723 K for 3 h, both {0002}<1010> and {1010}<1120> components are strengthened moderately. This indicates that grains with both two components mentioned above grow faster than those with other orientations. The {1010}<1120> component disappears and the intensity of {0002}<1010> component decreases significantly after hot rolling with a 30% reduction at 623 K. This is mainly attributed to rotational dynamic recrystallization (RDX) during the hot rolling.展开更多
The Al-Mg-Mn alloy sheets with and without trace Sc and Zr were investigated by means of tensile test, X-ray diffraction, optical microscope, and transmission electron microscope. The indexes of in-plane anisotropy （...The Al-Mg-Mn alloy sheets with and without trace Sc and Zr were investigated by means of tensile test, X-ray diffraction, optical microscope, and transmission electron microscope. The indexes of in-plane anisotropy （IIPA） of their tensile mechanical properties were calculated and their inverse pole figures were obtained by Harris method. The two alloy sheets have the same law of in-plane anisotropy and remarkable in-plane anisotropy of mechanical properties, and the IIPA of the alloy sheet with Sc and Zr is bigger than that of the alloy sheet without Sc and Zr. The relationships of the in-plane anisotropy and the anisotropy of the crystallographic texture were analyzed based on the model of monocrystal. It is the common action of the anisotropy of crystallography and microstructures that causes the in-plane anisotropy of their mechanical properties, but the major cause is the { 110 }〈112〉 crystallographic texture. The trace Sc and Zr can promote the formation and stabilization of the { 110 } 〈 112〉 texture, inhibit the formation of the { 100 } 〈001 〉 texture, and increase the in-plane anisotropy of the alloy sheet containing trace Sc and Zr.展开更多
The microstructures and the tensile mechanical properties in the rolling plane of 1545 aluminum alloy sheet at different orientations with respect to the rolling direction were studied by means of tensile test, X-ray ...The microstructures and the tensile mechanical properties in the rolling plane of 1545 aluminum alloy sheet at different orientations with respect to the rolling direction were studied by means of tensile test, X-ray diffractometer(XRD), optical microscope and transmission electron microscope. The in-plane anisotropy of tensile mechanical properties was calculated and the inverse pole figures of the rolling plane, transversal section and longitudinal section were obtained by Harris method. The results show that the 1545 Al alloy sheet has remarkable in-plane anisotropy of mechanical properties and the main texture component is {110}〈112〉 texture. On the basis of the model that regards the sheet containing only {110}〈112〉 texture as a monocrystal, the relationship of in-plane anisotropy and the anisotropy of crystallography was analyzed. The study shows that it is the combined effects of the anisotropy of crystallography and microstructures that cause the in-plane anisotropy of mechanical properties, but the main cause is the crystallographic texture.展开更多
Based on the crystallographic nature,two major characteristic textures of the deep drawing automobile body steel sheet are represented with inverse pole figures,The correlation between the textures of the deep drawing...Based on the crystallographic nature,two major characteristic textures of the deep drawing automobile body steel sheet are represented with inverse pole figures,The correlation between the textures of the deep drawing steel sheets and its deep drawing properties may be simply and directly analysed by the quantitative texture technique.The results obtained by this tech- nique is in agreement with that of ODF quantitative analysis.展开更多
基金Project(2006 BAE04B02-3) supported by the National Scientific and Technological Support Program during the 11th Five-year Plan of China
文摘The evolution of texture during the annealing and hot rolling process of extruded AZ31 magnesium alloy sheets was studied. There are two kinds of texture components in the extruded AZ31 sheets. One is {0002}<1010> and the other is {1010}<1120>. The {0002}<1010>component predominates. After annealing at 723 K for 3 h, both {0002}<1010> and {1010}<1120> components are strengthened moderately. This indicates that grains with both two components mentioned above grow faster than those with other orientations. The {1010}<1120> component disappears and the intensity of {0002}<1010> component decreases significantly after hot rolling with a 30% reduction at 623 K. This is mainly attributed to rotational dynamic recrystallization (RDX) during the hot rolling.
基金This work was financially supported by the National Key Fundamental Research Development Program (No.G1999064911).
文摘The Al-Mg-Mn alloy sheets with and without trace Sc and Zr were investigated by means of tensile test, X-ray diffraction, optical microscope, and transmission electron microscope. The indexes of in-plane anisotropy （IIPA） of their tensile mechanical properties were calculated and their inverse pole figures were obtained by Harris method. The two alloy sheets have the same law of in-plane anisotropy and remarkable in-plane anisotropy of mechanical properties, and the IIPA of the alloy sheet with Sc and Zr is bigger than that of the alloy sheet without Sc and Zr. The relationships of the in-plane anisotropy and the anisotropy of the crystallographic texture were analyzed based on the model of monocrystal. It is the common action of the anisotropy of crystallography and microstructures that causes the in-plane anisotropy of their mechanical properties, but the major cause is the { 110 }〈112〉 crystallographic texture. The trace Sc and Zr can promote the formation and stabilization of the { 110 } 〈 112〉 texture, inhibit the formation of the { 100 } 〈001 〉 texture, and increase the in-plane anisotropy of the alloy sheet containing trace Sc and Zr.
基金Project (G19999064911) supported by the National Key Fundamental Research Development Program of China
文摘The microstructures and the tensile mechanical properties in the rolling plane of 1545 aluminum alloy sheet at different orientations with respect to the rolling direction were studied by means of tensile test, X-ray diffractometer(XRD), optical microscope and transmission electron microscope. The in-plane anisotropy of tensile mechanical properties was calculated and the inverse pole figures of the rolling plane, transversal section and longitudinal section were obtained by Harris method. The results show that the 1545 Al alloy sheet has remarkable in-plane anisotropy of mechanical properties and the main texture component is {110}〈112〉 texture. On the basis of the model that regards the sheet containing only {110}〈112〉 texture as a monocrystal, the relationship of in-plane anisotropy and the anisotropy of crystallography was analyzed. The study shows that it is the combined effects of the anisotropy of crystallography and microstructures that cause the in-plane anisotropy of mechanical properties, but the main cause is the crystallographic texture.
文摘Based on the crystallographic nature,two major characteristic textures of the deep drawing automobile body steel sheet are represented with inverse pole figures,The correlation between the textures of the deep drawing steel sheets and its deep drawing properties may be simply and directly analysed by the quantitative texture technique.The results obtained by this tech- nique is in agreement with that of ODF quantitative analysis.
