Single cold rolling and double cold rolling were applied to hot rolled strips with different reduction ratios. The evolutions of { 100}, { 111} and Goss face texture during double rolling were investigated by comparin...Single cold rolling and double cold rolling were applied to hot rolled strips with different reduction ratios. The evolutions of { 100}, { 111} and Goss face texture during double rolling were investigated by comparing the orientation distribution function （ODF） of the double rolled sample with that of the single rolled one. The double cold rolling texture is characterized by a higher γ-texture and a lower α-texture, and the { 111}〈112〉 component is improved remarkably. Based on the TEM observation and mechanical properties test, it is found that the reduction ratio assignment significantly affects the texture variation, as-annealing microstructures, and properties of the double cold rolled samples. These results may provide a theoretical guide for the industrial production of double cold rolled IF steel.展开更多
The fatigue fracture was characterized and the fracture behavior was analyzed,using scanning electron microscope(SEM)and electron back-scattered diffraction(EBSD),the fatigue tests of two strain amplitude at room temp...The fatigue fracture was characterized and the fracture behavior was analyzed,using scanning electron microscope(SEM)and electron back-scattered diffraction(EBSD),the fatigue tests of two strain amplitude at room temperature were 0.5%and 1.0%respectively,and the results showed that the fatigue deformation of different strain amplitude produced two typical fatigue fracture morphology,and when the strain amplitude was 1.0%,fatigue fracture mechanism of AZ31 magnesium alloy induced by{1012}twins,when the strain amplitude is 0.5%,it was induced by{1012}-{1012}double twins.In the present study,the average thickness of primary twin is^20μm at amplitude of 0.5%and^80μm at amplitude of 1.%.The thickness of{1012}primary twins was large enough to activate{1012}-{1012}secondary twins at a high strain amplitude,while the thickness of{1012}primary twins was too narrow to activate{1012}-{1012}secondary twins at a low strain amplitude.展开更多
基金Projects (106112015CDJXZ138803,106112015CDJXY130003) supported by the Fundamental Research Funds for the Central Universities,ChinaProject (51421001) supported by National Natural Science Foundation of China
基金Projects(2016YFB0300901,2016YFB0700401) supported by the National Key Research and Development Program of ChinaProjects(106112015CDJXY130003,106112015CDJXZ138803) supported by the Fundamental Research Funds for the Central Universities,China
文摘Single cold rolling and double cold rolling were applied to hot rolled strips with different reduction ratios. The evolutions of { 100}, { 111} and Goss face texture during double rolling were investigated by comparing the orientation distribution function （ODF） of the double rolled sample with that of the single rolled one. The double cold rolling texture is characterized by a higher γ-texture and a lower α-texture, and the { 111}〈112〉 component is improved remarkably. Based on the TEM observation and mechanical properties test, it is found that the reduction ratio assignment significantly affects the texture variation, as-annealing microstructures, and properties of the double cold rolled samples. These results may provide a theoretical guide for the industrial production of double cold rolled IF steel.
基金financially supported by the National Natural Science Foundation of China(Nos.51671040,50890170 and 51421001)the National Basic Research Program of China(No.2010CB631004).
文摘The fatigue fracture was characterized and the fracture behavior was analyzed,using scanning electron microscope(SEM)and electron back-scattered diffraction(EBSD),the fatigue tests of two strain amplitude at room temperature were 0.5%and 1.0%respectively,and the results showed that the fatigue deformation of different strain amplitude produced two typical fatigue fracture morphology,and when the strain amplitude was 1.0%,fatigue fracture mechanism of AZ31 magnesium alloy induced by{1012}twins,when the strain amplitude is 0.5%,it was induced by{1012}-{1012}double twins.In the present study,the average thickness of primary twin is^20μm at amplitude of 0.5%and^80μm at amplitude of 1.%.The thickness of{1012}primary twins was large enough to activate{1012}-{1012}secondary twins at a high strain amplitude,while the thickness of{1012}primary twins was too narrow to activate{1012}-{1012}secondary twins at a low strain amplitude.
