Investigations on forming of aluminum 5052 and 6061 sheet alloys at warm temperatures

Mahabunphachai, Sasawat; Koç, Muammer

doi:10.1016/j.matdes.2009.11.053

Cited by 152 publications

(59 citation statements)

References 15 publications

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“…4) have moderate formability and strength compared, for example, to steel [3,12]. Their flow stress is known to be generally insensitive to the strain-rate [2]; corresponding data points lie therefore at the bottom of Fig.…”

Section: -Materials and Their Characteristicsmentioning

confidence: 99%

Designing laminated metal composites for tensile ductility

2015

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This contribution draws practical implications of a recently published estimation of the tensile ductility in laminated composites made of two ductile materials, typically metals or alloys, which harden as both the strain and the strain-rate increase. To this end, the literature is surveyed to collect values for the strain hardening exponent, the strain-rate sensitivity and the strength constant for a wide range of engineering metals and alloys. Material combinations that might produce ductile laminated metal composites are then examined in light of the data and theory. A simple graph is proposed, which gives a direct reading of the predicted elongation to failure of composites containing equal volume fractions of any two materials among those surveyed. The resulting plots show material combinations in which a more ductile material can significantly increase, within a Laminated Metal Composite (LMC), the tensile elongation of a less ductile material. In this role, 304 stainless steel and commercial purity iron emerge as sensible possibilities.

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Section: -Materials and Their Characteristicsmentioning

confidence: 99%

Designing laminated metal composites for tensile ductility

2015

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“…Thus, the model assumes that material properties are temperature-dependent. The temperature-dependent flow stresses [23,24] for AA6061, shown in Fig. 2 at a constant strain rate of 0.001 −1 , are assumed to follow an elastic-plastic constitutive law with work hardening obeying the von Mises' plasticity criterion, i.e.…”

Section: Input Modulementioning

confidence: 99%

A Multi-scale Thermomechanical-Solidification Model to Simulate the Transient Force Field Deforming an Aluminum 6061 Semisolid Weld

Rajani

Phillion

2015

Metall Mater Trans B

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Formation of hot cracks is strongly affected by the transient force field acting on the semisolid weld-base metal interface. This paper presents a model that numerically simulates such a transient force field as a function of welding parameters. The model consists of two modules: 1) By means of a granular model of solidification, the microstructure of the semisolid area within the weld is reconstructed in three dimensions; 2) Since the transient force field is developed through the mechanical interaction between the semisolid weld and its base metal, the mechanical response of the base metal to the solidification of the weld is then simulated through finite element analysis.The results show that changing welding parameters and welding constraints varies the transient force field. Based on the obtained force fields, a qualitative study is also conducted to predict the susceptibility of various welds to hot cracking.

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“…They determined the forming limit diagram (FLD) under warm forming conditions, which showed that formability was almost twice as high at 350°C than that at 250°C. Mahabunphachai and Koc 7 and Kim and Koc 8 reported that the springback in warm forming was greatly reduced by increasing the forming temperature above 200°C. However, the main disadvantage of warm forming is that it abates the mechanical properties.…”

Section: Introductionmentioning

confidence: 99%

Development of a partition panel of an Al6061 sheet metal part for the improvement of formability and mechanical properties by hot forming quenching

Kim

Park

2017

Advances in Mechanical Engineering

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In this study, the hot forming quenching process was investigated to improve the deficiencies that arise in materials subjected to conventional cold stamping, such as low formability and undesirable mechanical properties. The hot forming quenching process was mainly discussed in terms of formability and mechanical properties in this study and was first evaluated by preliminary tests. To examine formability, an evaluation was conducted using hot-tensile and hemisphericaldome stretching tests at temperatures of 350°C and 450°C, respectively. In addition, the mechanical properties of the formed part were predicted using quench factor analysis, which was based on the cooling temperature during the die quenching process. These preliminary test results were then used to predict the formability and hardness of the partition panel of an automotive part, where the analytical results indicated high performance of the hot forming quenching process, in contrast to conventional forming. Finally, the hot forming quenching experiment of the partition panel was carried out to validate the predicted results and the obtained formability and hardness values were compared with conventional forming at room temperature using T4 and T6 heat-treated sheets. The analytical and experimental results indicate that the hot forming quenching process is a very effective method for obtaining desirable formability and mechanical properties in the forming of aluminum sheets.

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Investigations on forming of aluminum 5052 and 6061 sheet alloys at warm temperatures

Cited by 152 publications

References 15 publications

Designing laminated metal composites for tensile ductility

Designing laminated metal composites for tensile ductility

A Multi-scale Thermomechanical-Solidification Model to Simulate the Transient Force Field Deforming an Aluminum 6061 Semisolid Weld

Development of a partition panel of an Al6061 sheet metal part for the improvement of formability and mechanical properties by hot forming quenching

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