Optimization of combined properties of aluminum matrix and interface in an aluminum/steel bimetal via low temperature aging

IF 3.5 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Journal of Materials Science Pub Date : 2024-11-23 DOI:10.1007/s10853-024-10459-0

Yumeng Chen, Yudong Cao, Kaixuan Chen, Xiaocong Kuang, Hong Xu, Guowei Zhang, Xiaoyan Ren, Yuzhi Zhu, Xiaohua Chen, Zidong Wang

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引用次数: 0

Abstract

The effects of varied aging treatments are investigated on microstructure and properties in a ZL702A/SUS304 steel bimetal. Si and Al₂Cu precipitates are detected in aluminum matrix after peak aging at 80 °C, 120 °C, and 160 °C, all of which yield close hardness within 77 ~ 79 HV. Notably, 80 °C peak aging produces finer, denser, and more uniform precipitates, stemming from the better thermodynamic and kinetic precipitation conditions. A thin oxidation layer is generated at AlFe(Si) transition layer/steel matrix interface after solid solution treatment. The layer remains in thinness (< 1 μm) under 80 °C peak aging but seriously thickens under 120 °C (avg. 16.2 μm) and 160 °C (avg. 12.9 μm), ascribed to the varied diffusion and oxidation kinetics. This generates higher average shear strength of 38.2 MPa in former than that of 28.5 MPa in latter. Fractography indicate fracture under shear loading propagates at thin oxidation layer and occasionally to steel side in 80 °C low temperature bimetal, relieving the devastating fracturing completely through thick fragile oxidation layer in 120 °C and 160 °C peak-aged ones. This work highlights low temperature aging strategy for fine precipitation hardening in aluminum and meantime maintaining a good interfacial bonding of aluminum/steel bimetal.

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来源期刊

Journal of Materials Science 工程技术-材料科学：综合

CiteScore

7.90

自引率

4.40%

发文量

1297

审稿时长

2.4 months

期刊介绍： The Journal of Materials Science publishes reviews, full-length papers, and short Communications recording original research results on, or techniques for studying the relationship between structure, properties, and uses of materials. The subjects are seen from international and interdisciplinary perspectives covering areas including metals, ceramics, glasses, polymers, electrical materials, composite materials, fibers, nanostructured materials, nanocomposites, and biological and biomedical materials. The Journal of Materials Science is now firmly established as the leading source of primary communication for scientists investigating the structure and properties of all engineering materials.