Microstructure controlled bending response in AA6016 Al alloys

Tian

et al. 2018

Automot. Innov.

Unavoidably, Fe impurities are mixed into Al alloys during recycling of aluminum automotive parts. High Fe content recyclefriendly aluminum alloy sheets (RASs) are discussed in terms of their applications to car body parts and closures. RASs have advantages, such as they are low cost and light weight, they require less energy to process, and they reduce emissions when used in vehicles. The hemming ability of RASs was investigated through various quenching rates and hot-rolling reduction rates. The hemming factor (HF) values of low Fe content samples (0.1 and 0.3 wt% Fe content) were 2 and 3. The hemming ability of samples with an Fe content of 0.5 wt% was unacceptable for applications to automotive outer closures (i.e., HF values of 4 and 5). The HF values changed from 3 to 5 for even higher Fe content samples (0.8 wt% Fe), depending on the quenching and hot-rolling reduction rates. Lower quenching (air quenching) and lower hot-rolling reduction rates (6-pass hot rolling) both improved the hemming ability of the high Fe content samples. A low-cost and recycle-friendly aluminum alloy automotive sheet from end-of-life vehicles is presented, and its hemming properties are characterized.Keywords Recycle-friendly · Lightweight · Hemming · Aluminum alloy · Automotive sheets · End-of-life vehicle Abbreviations

Section: Mechanistic Discussionmentioning

confidence: 99%

Section: Mechanistic Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Recycle-Friendly Aluminum Alloy Sheets for Automotive Applications Based on Hemming

Tian

et al. 2018

Automot. Innov.

“…The key step in 2060 alloy, the process of obtaining appropriate size and shape is the most important step for working as aircraft structural component, and one commonly used deformation processing is bending, which is an environment-friendly and low waste method in the manufacture of structural parts [6].…”

Section: Introductionmentioning

confidence: 99%

Strain Characterization and Microstructure Evolution Under Deformation in 2060 Alloy

Jin

IOP Conf. Ser.: Mater. Sci. Eng.

Zhao

et al. 2018

An electron back-scattered diffraction study on the microstructure evolution of severely deformed aluminum AI6061 alloy M Vaseghi, A Karimi Taheri A new method of DIC combined with EBSD is developed for the characterization of strain and microstructure evolution during bending. The traditional microhardness point and DIC methods are used to study the microstructure evolution in 2060 alloy during bending; the interested area suffers under tensile stress, the microstructure evolution is collected by SEM, EBSD, digital image correlation (DIC) method during bending. The results shows that the DIC method can both realize the strain tensor characterization of the interested area, and can also express the local strain tensor in the micro-area even more. The degree of grain division in the process of deformation is related to the strain in this region; the grains have larger strain of small angle grain boundary (SLGBs), which results in a new micro-organizational structure.The misorientation is smaller with larger strain degree while the misorientation is larger with smaller strain.

“…The 2060 alloy is one of the third-generation Al-Li products developed by Alcan Inc., in 2011 for the manufacture of fuselage and lower wing skin structure in replacement of traditional aluminum alloys [3]. For 2060 alloy, the process of obtaining appropriate size and shape is the most important step for working as aircraft structural component, and one commonly used deformation processing is bending, which is an environment-friendly and lowwaste method in the manufacture of structural parts [4].…”

Section: Introductionmentioning

confidence: 99%

Study of Dislocation Boundary Structure in Al–Li Alloy During Bending

Jin

Fu²,

Acta Metall. Sin. (Engl. Lett.)

et al. 2015

The dislocation boundary structures of 2060-T8 alloy during bending were investigated by backscattered electron imaging, electron backscattered diffraction, and misorientation axes maps. Experimental result shows that typical dislocation boundary structures, which depend on grains' orientation, are formed in grains during bending. The microstructure of type A is mainly observed in grains near brass, copper, and Goss orientations; microstructure of type B is mainly found in grains near S orientation; microstructure of type C is mainly seen in grains near Cube orientation. The angle between geometrically necessary boundaries (GNBs) and force axis is in the range of -45°to -30°and 30°to 45°. Most of the GNBs are approximately parallel to the trace of {111} slip planes which are identified by Schmid factor analysis.