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 …
ABSTRACT In sheet metal forming processes, formability is a critical material property that needs to be estimated before the production of forming parts. Some popular tools used in the literature to study the formability of the sheet metal are: Forming Limit Diagram (FLD), Fracture Forming Limit Diagram (FFLD) and Forming Stress Limit …
steel Bubble chart. steel Banana diagram. Steel strength ductility diagram—it's been called a lot of things over the years. Now called the steel Global Formability Diagram, a new 2021 version is available for download and use. In addition in this article, we define Advanced High-Strength Steels, Ultra-High-Strength Steels and 3rd Generation steels.
Crack prediction in sheet forming of zirconium alloys used in nuclear fuel assembly by support vector machine method. Author links open overlay ... It is known that these processing parameters could affect the formability of material during the sheet forming process to a certain degree. But the influence of these parameters on the …
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the poor forming ability of zirconium sheets, cracks and other defects often occur in the stamping process, which results in serious harm to the safety of the nuclear …
2.2. Setup designation for formability tests. A special punching device was developed to precisely control the punch stroke in both the EM and QS forming processes, as illustrated in Ref. [33].The formability for uniaxial tension was tested using a U-shaped punch of radius 7 mm, whereas that in the plane-strain and equibiaxial tension regions …
In sheet metal forming processes, formability is a critical material property that needs to be estimated before the production of forming parts. Some popular tools used in the literature to study the formability of the sheet metal are: Forming Limit Diagram (FLD), Fracture Forming Limit Diagram (FFLD) and Forming Stress Limit Diagram …
Zircaloy-4 (Zr-4) sheet is commonly used in fuel assembly structural parts as spacer grids which are subjected to high temperature and stresses, corrosive and radiation environment. The knowledge regarding the properties and the formability with respect to initial texture of Zr-4 sheet is not enough. In this paper, finite element method was used …
In this study, the formability of sheet zirconium was analytically as well as experimentally investigated. The cylindrical deep drawing, Erichsen and bore-expanding …
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.
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 ...
In this paper, finite element method was used to simulate the forming process of Zr-4 sheet, and effect of different initial hardening exponent (n value) on the …
Semantic Scholar extracted view of "Study on deformation mechanisms and stretch formability of zirconium alloys with different textures under biaxial tensile stress" by Hong Gao et al. ... Influence of stress state on microstructure evolution of AZ31 Mg alloy rolled sheet during deformation at room temperature. Dabiao Xia Guangsheng Huang ...
Request PDF | Compositional optimization of Mg–Zn–Sc sheet alloys for enhanced room temperature stretch formability | Effects of scandium (Sc) content on microstructures and mechanical ...
A positioning grid is a key clamping structure for fixing the transverse and axial positions of fuel assemblies in nuclear reactors, and it is generally prepared by the …
For low-cost high-performance AXMZ alloy sheets, the alloy design concept combined with appropriate processing techniques (TRC and rolling-annealing, T4, T6 and bake hardening treatment) allows for the development of a Mg alloy sheet having an excellent combination of strength, ductility and stretch formability at RT, which …
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 ...
Due to the poor formability of zirconium alloy, crack is one of its most common failure modes when the alloy is used for strips of spacer grids of nuclear fuel assembly during the sheet forming process. In this paper, the relationships between processing parameters (including punching speed, stamping clearance and blank-holder …
Abstract Zirconium alloy is extensively used in nuclear industries as cladding and core structural material. However, the formability and service behavior are affected due to the anisotropy of mechanical property, which is detrimental to the specific application. In this work, effect of pre-straining and subsequent annealing (PA) on …
Therefore, research on the formability of zirconium alloy sheet is . very necessary. Generally, there are many factors which affected the formability of zirconium alloy . sheet.
The process formability of incremental sheet forming (ISF) is better than the conventional forming processes. Stretching, through-thickness-shear, bending-under-tension (BUT), and compressive forces are the proposed deformation mechanisms for improved formability; however, researchers have not corroborated (on consensus) the relative significance of …
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 ...
Chemical processing, nuclear, and more—GSM's ASTM B551 zirconium and zirconium alloy strip, sheet, and plate meet critical industry needs. Home; Products. Titanium Alloys ... Ductility (potentially varies by grade): Depending on the specific grade, the sheet and plate might offer some formability for shaping during fabrication. High Melting ...
Zirconium and Scandium additives, up to 0.02 percent, have been found to effectively increase UTS and YS. 3. Scandium and zirconium additives were found to successfully compensate for the decrease in Magnesium. 4.
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 …
The effectiveness of Ca or Gd addition on ductility and formability of Mg-Zn-Zr based dilute alloys in deep drawing has not been systematically compared previously. In this study, formable Mg-Zn-Gd-Zr and Mg-Zn-Ca-Zr sheet alloys are produced by hot rolling. These sheets have similarly weakened basal texture, but the sheet of the Mg-Zn …
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 …
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.
Semantic Scholar extracted view of "Formability of a commercially pure zirconium sheet" by H. Takuda et al. Skip to search form Skip to main content Skip to ...
Formability is the ability of a given metal work piece to undergo plastic deformation without being damaged. The plastic deformation capacity of metallic …