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In the present study, the formability of sheet zirconium in a fundamental forming process is investigated experimentally. In addition to uniaxial tension tests, deep drawing, Erichsen and bore-expanding tests are carried out for a commercially-pure …
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The use of aluminum makes it possible to reduce the weight of the car, thereby improving the environmental impact of transport by reducing CO 2 emissions. Rolling sheets made of 5182 alloy are widely used for the manufacture of …
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Many urgently needed inconel superalloy parts with complex internal cavity geometry and high surface precision are difficult to prepare by traditional subtractive manufacturing methods because of its poor machinability. The additive manufacturing technology that has emerged in recent years became a research hotspot in the …
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In this study, the formability of sheet zirconium was investigated experimentally. In addition to uniaxial tension tests, cylindrical deep drawing, Erichsen …
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Therefore, micro-pits on zirconium alloy sheets by micro im technology were studied in this paper. The micro im experiment was used to fabricate high-density micro pits on ...
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1. Introduction. Zirconium alloys are widely used in the nuclear industry due to its excellent comprehensive properties [1].Structural components comprising zirconium alloys are often under biaxial stresses during manufacturing and servicing [2].It is found that the failure limit and stretch formability of the zirconium alloy tube [3] or plate [4] are …
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In this study, uniaxial and biaxial tensile tests were performed on commercially pure zirconium with strong basal texture (BT) and weakened texture (WT) …
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In the present study, the formability of a commercially pure zirconium sheet in fundamental forming processes, i.e. in deep drawing, stretching and bore-expanding …
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The mechanisms of how the annealing treatment affects the formability of the Zrâˆ'Snâˆ'Nb zirconium alloy were discussed as follows from both macro perspective and micro perspective. 2.3 Microstructure observations To further discuss the effect of annealing process on the formability of the material, the microstructures and textures of ...
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Overview of materials and treatment aspects of manufacturability of sheet metal. Written by an industrial expert turned scientist. Concentrates on the formability of sheet metal, one of the fundamental form material is used in metalworking.
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Zirconium sheet has been widely used in various fields, e.g., chemistry and aerospace. The surface scratches on the zirconium sheets caused by complex processing environment have a negative impact on the performance, e.g., working life and fatigue fracture resistance. ... Hatta N. Formability of a commercially pure zirconium sheet. J. …
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Crack prediction in sheet forming of zirconium alloys used in nuclear fuel assembly by support vector machine method. Author links open overlay panel Congyi Lei a b, Jianzhong Mao a b, ... By analyzing the effects of the processing parameters on the formability of zirconium alloys and comparing the predicted performances of different …
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Made available by U.S. Department of Energy Office of Scientific and Technical Information ...
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The BHF is another important factor to influence the sheet metal formability. When the BHF is too low or too high, wrinkle or fracture may occur, respectively. ... Numerical analysis of formability of a commercially pure zirconium sheet in some sheet forming processes. Material Science and Engineering A, 242 (1998), pp. 15-21. View …
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Different material state can affect formability of AlMgSi sheets. These study analysed the influence of heat treatment conditions on the drawability of the sheet made of 6082 aluminium alloy. The ...
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Zirconium sheet has been widely used in various fields, e.g., chemistry and aerospace. The surface scratches on the zirconium sheets caused by complex processing environment have a negative impact on the performance, e.g., working life and fatigue fracture resistance. Therefore, it is necessary to detect the defect of zirconium sheets. …
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The current research focusses on the forming limit curves (FLC), which is one of the way of investigation performed to predict the formability of the material Zirconium 702 (Zr702) with the sheet ...
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To examine the fundamental sheet formability of zirconium, deep drawing, Erichsen and bore-expanding tests are carried out for a commercially pure zirconium …
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A large chapter is devoted to formability testing both for bulk metal and sheet metal forming. For the first time testing methods for plastic anisotropy of round bars and tubes are included. A profound survey is given of literature about yield criteria for anisotropic materials up to most recent developments and the calculation of forming ...
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By analyzing the effects of the processing parameters on the formability of zirconium alloys and comparing the predicted performances of different models, it can …
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Generally, there are many factors which affected the formability of zirconium alloy sheet. Among them, the initial texture of Zr-4 sheets is one of the important factors. Zhang [6] et al.
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The stamping results indicate that the sheet is free of cracks under an Fn of 0.690. Therefore, texture optimization with the proposed rolling process can improve the …
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Microstructures and formability of scandium and zirconium added Al-Mg-Mn alloy sheets with various heating conditions were examined to improve their mechanical properties. Formability of these samples were judged by the Lankford value, r-value. It was possible to fabricate mechanically balanced Al-M …
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Various theoretical and empirical models have been developed to predict the formability of metallic sheets, as shown in Fig. 3.Primary models used for forming limit prediction include the models based on bifurcation theory, the models based on geometrical imperfection theory and the models based on continuum damage mechanics.
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constant with tremendous strain for zirconium thin sheets [8]. In addition, the plastic strain anisotropy evolves rap-idly in HCP metals compared with that in cubic metals, and ... Kim et al. [14] found that the formability of sheet can be improved by annealing. In summary, various researchers have been stepping up huge eorts to control the ...
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To examine the formability of sheet zirconium in forming processes, some fundamental sheet forming tests, i.e. the deep drawing, the Erichsen and the bore-expanding tests are carried out for a commercially-pure zirconium sheet. The tensile properties are also examined by uniaxial tension tests in the directions of 0°, 45° and 90° to the rolling …
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With higher Zn content the age-hardenability was increased, but at the same time the formability of the sheet decreased, concurrent to the basal-type texture development during rolling. ... Basu I., Al-Samman T. Triggering rare earth texture modification in magnesium alloys by addition of zinc and zirconium. Acta Mater. 2014; 67:116–133. doi ...
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Among the methodologies to evaluate formability, forming limit diagrams plays a relevant role. Forming Limit Diagram. The maximum values of the principal in-plane strains ε 1 and ε 2 can be determined by measuring the strains at failure (necking, fracture, wrinkling, etc.) on sheet components covered with grids of circles. The research in this …
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In addition, aluminum alloy sheet has poor formability and deformation uniformity at room temperature, which leads to obvious thinning, cracking and other problems in the forming process of aluminum alloy complex thin-walled part (Zheng et al., 2019). The contradiction between the large deformation demand of aluminum alloy …
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The strongly anisotropic mechanical behaviors commonly observed in Zr-4 sheets typically lead to inferior formability. In this study, the mechanical behavior and texture evolution of a cold-rolled Zr-4 sheet under uniaxial tension in various directions were systematically investigated, and the results showed both anisotropic yielding and …
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