Aluminum Extrusions for Automotive Crash Applications

Parson, Nick; Jerome, Fourmann; Béland, Jean-François

doi:10.4271/2017-01-1272

Cited by 13 publications

(5 citation statements)

References 4 publications

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“…It can be guessed that when there are no GBPs, or the fraction of high angle grain boundaries in an alloy is very small, the crushing performance will be improved. This is also in line with the research of Parson [21]. The crushing performance of alloys with more fiber grains is better than alloys with more recrystallization.…”

Section: Discussionsupporting

confidence: 90%

“…In order to investigate the crushing performance quantitatively, the degree of crushing performance was assessed qualitatively, using a grading scale from 1 to 9, with a grade of 1 being the worst crushing performance and a grade of 9 representing the best crushing performance. Table 2 summarizes a crushing performance rating system, which is the modified version of the one proposed in research [21]. Few small corner cracks on the folds 8…”

Section: Methodsmentioning

confidence: 99%

“…Henn et al [19,20] proposed some indices from tensile test to evaluate the crushing performance. The reliability of the method based on fracture surface measurement at tensile test was proved according to Parson [21].…”

Section: Introductionmentioning

confidence: 99%

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Effect of Aging Time on Crushing Performance of Al-0.5Mg-0.4Si Alloy for Safety Components of Automobile

Jiang²,

et al. 2021

Metals

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The effect of aging time on the crushing performance of Al-0.5Mg-0.4Si alloy used for safety components of automobile was investigated by tensile test and crush test. Moreover, the microstructure of the alloy was investigated by transmission electron microscopy (TEM). The results show that the localized deformation ductility index, ΔAabs, which is defined as the difference between total elongation and uniform elongation, of Al-0.5Mg-0.4Si alloy is 6.5%, 7.0% and 8.5%, respectively, after being aged at 210 °C for 1, 3 and 6 h, and this tendency is the same as that of the crushing performance. The spacing of grain boundary precipitates (GBPs) from TEM results are found to be 94.9, 193.6 and 408.2 nm after being aged at 210 °C for 1, 3 and 6 h, respectively, and this tendency is same to that of ΔAabs. A mechanism about the relation between the spacing of GBPs and the ductility index ΔAabs has been proposed based on localized deformation around GBPs. With the increase of GBPs spacing, the ΔAabs increases, and the crushing performance is improved.

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Section: Discussionsupporting

confidence: 90%

Section: Methodsmentioning

confidence: 99%

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Effect of Aging Time on Crushing Performance of Al-0.5Mg-0.4Si Alloy for Safety Components of Automobile

Jiang²,

et al. 2021

Metals

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“…Hence, Al-Mg-Si-extruded profiles with excellent crash performance are widely used for structural components such as bumpers, the front rail, pillars and side impact beams [1][2][3]. In contrast to the tensile test, the bend test is more suitable to evaluate the plastic of automotive structures during crashes, e.g., impacts or collisions [3][4][5]. However, extruded Al-Mg-Si alloys have strong anisotropy when bending and lower fracture resistance as strength increases [6,7].…”

Section: Introductionmentioning

confidence: 99%

Effect of Mg/Si Ratio on the Bendability and Anisotropic Bend Behavior of Extruded 6000-Series Al Alloy

Zhang

Wang

2023

Materials

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Extruded Al-Mg-Si profiles applied in the automotive industry are required to achieve an appropriate combination of strength and bendability. In order to investigate the effect of Mg/Si ratio on the bendability and anisotropic bending behavior, AA6005 and AA6061C were extruded to 2 mm thick plates. More Goss texture and anisotropic particle clusters exist in AA6005 alloys with a low Mg/Si ratio, which leads to a high tendency of surface roughing and cracking and to strong anisotropy in their bendability. However, more low-angle grain boundaries, cubic texture and comparatively random distribution of particles exists in AA6061C alloys with a high Mg/Si ratio, which blunts the surface roughing and crack process. The surface undulation is the outcome of the strain-intense localization of several layers of grains in the vicinity of the outer elongated surface. The strain localization and surface undulation lead to shear band initiation near the valleys. Several cooperating micro-mechanisms in AA6005, including grain clusters with Goss and Cubic orientation, heterogeneously nucleated particles and grain boundary spatial arrangements, lead to the grain boundary decohesion along a shear direction. AA6005 shows for predominately intergranular fractures in nature, with some areas exhibiting grain boundary decohesion during bending in the TD. However, AA6061C shows a predominately transgranular in nature, with some areas exhibiting intergranular fracture, which is affected by shear band development.

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“…The extrusion of Al-Mg-Si aluminum alloys represents a competitive manufacturing solution to produce profiles with complex geometries and constant cross sections. These profiles are used in sectors such as civil, industrial and automotive due to several properties, which make these alloys particularly suitable for these markets [1][2][3][4]. For structural applications, mechanical properties must be consistent throughout the extent of the profile, so that defects deteriorating such properties cannot be tolerated.…”

Section: Introductionmentioning

confidence: 99%

FEM Analysis of the Skin Contamination Behavior in the Extrusion of a AA6082 Profile

Negozio

Pelaccia

Donati

et al. 2022

KEM

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In the extrusion of aluminum alloys, the skin contamination lead to the scraping of the profile extent in which this defect occurs. In order to optimize the scraping process, extrusion companies and die makers can either perform time-consuming and expensive analyses to experimentally determine the evolution of the defect or rely on predictive methods. Recently, numerical methods, as the Finite Elements, are increasingly used to predict the evolution of the skin contamination, but their accuracy is still uncertain. In this work, an AA6082 aluminum profile of industrial complexity is analysed and the data collected used to validate an innovative method for the prediction of the skin contamination evolution developed using the commercial FEM code Qform®. In addition, the results are used to assess the prediction accuracy of an industrial empirical formula often used by operators.

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Aluminum Extrusions for Automotive Crash Applications

Cited by 13 publications

References 4 publications

Effect of Aging Time on Crushing Performance of Al-0.5Mg-0.4Si Alloy for Safety Components of Automobile

Effect of Aging Time on Crushing Performance of Al-0.5Mg-0.4Si Alloy for Safety Components of Automobile

Effect of Mg/Si Ratio on the Bendability and Anisotropic Bend Behavior of Extruded 6000-Series Al Alloy

FEM Analysis of the Skin Contamination Behavior in the Extrusion of a AA6082 Profile

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