High-throughput characterisation of the long-term ageing of an A357+1wt%Cu cast aluminium alloy using temperature gradient

IF 3 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materialia Pub Date : 2025-02-15 DOI:10.1016/j.mtla.2025.102378

Thomas Perrin , Arthur Després , Pierre Heugue , Alexis Deschamps , Frédéric De Geuser

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Abstract

A357 alloy is a widely studied cast aluminium alloy used in applications such as cylinder heads or aerospace applications. The addition of 1wt% copper to this alloy modifies the nanometric precipitation sequence and improves heat resistance. Thermal ageing resistance is a critical property for such applications and the ability to predict the end of life of these products is crucial. In this study, we investigate the effect of long-term ageing on an A357+1wt%Cu alloy. We have developed a combinatorial approach to gather sufficient data to model the evolution of mechanical properties during extended ageing. Samples have been aged in a temperature gradient for durations up to 10,000 h and then characterised using space-resolved Small- and Wide-Angle X-ray Scattering (SAXS & WAXS), as well as hardness mapping. Complementary Transmission Electron Microscopy (TEM) observations were also performed. Finally, a simple approach based on time-temperature equivalence is implemented to predict the evolution of the mechanical properties and the nanometric precipitation during long-term ageing.

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A357 合金是一种被广泛研究的铸造铝合金，用于气缸盖或航空航天等应用领域。在这种合金中添加 1wt% 的铜可以改变纳米沉淀序列，提高耐热性。耐热老化性是此类应用的关键特性，因此预测这些产品的使用寿命至关重要。在本研究中，我们研究了长期老化对 A357+1wt%Cu 合金的影响。我们开发了一种组合方法来收集足够的数据，以模拟长期老化过程中机械性能的演变。样品在温度梯度中进行了长达 10,000 小时的老化，然后使用空间分辨小角和广角 X 射线散射（SAXS & WAXS）以及硬度图进行表征。此外，还进行了补充性透射电子显微镜（TEM）观察。最后，采用一种基于时间-温度等效性的简单方法来预测长期老化过程中机械性能和纳米析出的演变。

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来源期刊

Materialia MATERIALS SCIENCE, MULTIDISCIPLINARY-

CiteScore

6.40

自引率

2.90%

发文量

345

审稿时长

36 days

期刊介绍： Materialia is a multidisciplinary journal of materials science and engineering that publishes original peer-reviewed research articles. Articles in Materialia advance the understanding of the relationship between processing, structure, property, and function of materials. Materialia publishes full-length research articles, review articles, and letters (short communications). In addition to receiving direct submissions, Materialia also accepts transfers from Acta Materialia, Inc. partner journals. Materialia offers authors the choice to publish on an open access model (with author fee), or on a subscription model (with no author fee).