Journal ArticleDOI
The development of a forming limit surface for 5083 aluminum alloy sheet
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TLDR
In this paper, a Nakazima-based stretching setup was designed and built for testing sheet metals at elevated temperatures, and the deformed specimens were combined to construct a unique three-dimensional forming limit surface for describing material formability limits at wide-ranging temperatures.Abstract:
A custom mechanical stretching setup based on the Nakazima method was designed and built for testing sheet metals at elevated temperatures. Specimens from a fine-grained 5083 aluminum alloy sheet were deformed at various temperatures, spanning between those associated with warm forming (250°C) and hot forming (550°C). Circle grid analysis of the deformed specimens produced the forming limit curves at each of the covered temperatures, hence revealing the great influences of forming temperature on the material’s formability limits. Finally, all the curves were combined to construct a unique three-dimensional forming limit surface, which we present here as a more comprehensive map for describing material formability limits at wide-ranging temperatures.read more
Citations
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Formability of AA3003 brazing sheet at elevated temperatures: limiting dome height experiments and determination of forming limit diagrams
TL;DR: In this article, a digital image correlation (DIC) system was used to perform in situ strain measurement on AA3003 brazing sheet and formability experiments were conducted.
An Investigation, Using Standard Experimental Techniques, to Determine FLCs at Elevated Temperature for Aluminium Alloys
TL;DR: In this article, the GOM ARGUS system was employed for measuring surface strain based on pre-applied grids (pattern), and limit strains were determined according to the ISO 12004-2:2008 standard.
Journal ArticleDOI
Experimental and Numerical Investigation of Forming Limit Differences in Biaxial and Dome Test
TL;DR: In this paper, a test machine called a biaxial test was devised that would provide the capability to test the specimen in multiaxially stress states by varying the independent load or displacement on two independent axis.
References
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Journal ArticleDOI
Stretching limits in sheet metals: In-plane versus out-of-plane deformation
TL;DR: In this article, the authors measured limiting principal strains by two different techniques of biaxial stretching of sheets, one of which permits free deformation in a flat plane, while the other causes constrained deformation when in contact with a rigid or rubber punch.
Journal ArticleDOI
Formability of stamping magnesium-alloy AZ31 sheets
Fuh-Kuo Chen,Tyng-Bin Huang +1 more
TL;DR: In this paper, the formability of stamping magnesium-alloy AZ31 sheets at elevated temperatures was investigated by conducting various experiments, and the experimental results indicated that AZ31 sheet exhibit poor formability at room temperature, but the formsability is improved significantly at higher temperatures.
Patent
Quick plastic forming of aluminum alloy sheet metal
Chongmin Kim,Sooho Kim,Moinuddin Sirdar Rashid,Edward F. Ryntz,Frederick Irvin Saunders,Ravi Verma +5 more
TL;DR: In this article, a method for stretching magnesium-containing aluminum alloy sheet stock into intricate shapes such as are required in automotive body panels is described, where the sheet stock, at a temperature in the range of about 400° C. to about 510° C., is stretched under the pressure of a working gas into conformance with the surface of a forming tool.
Journal ArticleDOI
Stretch formability of AZ31 Mg alloy sheets at different testing temperatures
TL;DR: In this article, stretch formability of AZ31 Mg alloy sheets was investigated by Erichsen tests at room temperature and stretch forming tests at 523 K. It is suggested that reduction of strain and plastic anisotropies related to texture intensity and texture distribution should be the dominant factor for excellent stretch forming.
Journal ArticleDOI
Overview of Quick Plastic Forming Technology
TL;DR: Quick Plastic Forming (QPF) as mentioned in this paper is a hot blow forming process capable of producing aluminum closure panels at high volumes and has been successfully implemented for automotive liftgates and decklids with complex shapes.