Development of a plane strain tensile test to characterize the formability of 5xxx and 6xxx aluminium alloys

IF 2.6 3区材料科学 Q2 ENGINEERING, MANUFACTURING

International Journal of Material Forming Pub Date : 2024-01-02 DOI:10.1007/s12289-023-01805-9

Maryse Gille, Fanny Mas, Jean-Christophe Ehrström, Dominique Daniel

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Abstract

This article presents the development of a plane strain tensile test aiming at an easy classification of aluminium automotive alloys according to their formability in prototyping steps. A parametric study with finite element method is performed on three different designs inspired by literature. It is found that, due to plastic anisotropy, specimens designed for steel are not suited for aluminium alloys. One optimized specimen geometry, ensuring near plane strain state on a large zone all along the deformation range up to failure, is selected. On this geometry, tensile tests instrumented by Digital Image Correlation are performed for five different aluminium alloys (5xxx and 6xxx) in three different directions of the metal sheet (rolling, diagonal and transverse). From Digital Image Correlation analysis, necking limits are evaluated and their relevance for the ranking of alloys according to their formability is discussed in comparison with a standard formability test, namely the Limiting Dome Height test.

Graphical Abstract

Abstract Image

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开发平面应变拉伸试验，鉴定 5xxx 和 6xxx 铝合金的可成形性

摘要本文介绍了平面应变拉伸试验的开发情况，目的是根据铝汽车合金在原型制造步骤中的成型性对其进行简单分类。受文献启发，采用有限元法对三种不同的设计进行了参数研究。研究发现，由于塑性各向异性，为钢材设计的试样并不适合铝合金。我们选择了一种优化的试样几何形状，它能确保试样在整个变形范围内接近平面应变状态，直至失效。在这种几何形状上，用数字图像相关仪对五种不同的铝合金（5xxx 和 6xxx）在金属板的三个不同方向（滚动、对角和横向）进行了拉伸试验。通过数字图像相关性分析，对缩颈极限进行了评估，并将其与标准成形性测试（即极限圆顶高度测试）进行比较，讨论了根据合金的成形性对其进行排序的相关性。图表摘要

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来源期刊

International Journal of Material Forming ENGINEERING, MANUFACTURING-MATERIALS SCIENCE, MULTIDISCIPLINARY

CiteScore

5.10

自引率

4.20%

发文量

审稿时长

>12 weeks

期刊介绍： The Journal publishes and disseminates original research in the field of material forming. The research should constitute major achievements in the understanding, modeling or simulation of material forming processes. In this respect ‘forming’ implies a deliberate deformation of material. The journal establishes a platform of communication between engineers and scientists, covering all forming processes, including sheet forming, bulk forming, powder forming, forming in near-melt conditions (injection moulding, thixoforming, film blowing etc.), micro-forming, hydro-forming, thermo-forming, incremental forming etc. Other manufacturing technologies like machining and cutting can be included if the focus of the work is on plastic deformations. All materials (metals, ceramics, polymers, composites, glass, wood, fibre reinforced materials, materials in food processing, biomaterials, nano-materials, shape memory alloys etc.) and approaches (micro-macro modelling, thermo-mechanical modelling, numerical simulation including new and advanced numerical strategies, experimental analysis, inverse analysis, model identification, optimization, design and control of forming tools and machines, wear and friction, mechanical behavior and formability of materials etc.) are concerned.