Effect of lamellar structural parameters on the bending fracture behavior of AA1100/AA7075 laminated metal composites

Taiqian Mo ¹Zejun Chen ¹Dayu Zhou ¹Guangming Lu ¹Yongmeng Huang ¹Qing Liu²

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作者信息

1. Joint International Research Laboratory for Light Alloys,Ministry of Education,College of Materials Science and Engineering,Chongqing University,Chongqing 400044,China
2. Key Laboratory for Light-weight Materials,Nanjing Tech University,Nanjing 210009,China
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Abstract

The lamellar structure has an important impact on the mechanical properties of dissimilar laminated metal composites(LMCs),including the thickness ratio of dissimilar metal constituent layers and the number of layers.AA1100 and AA7075 with thickness ratios of 1∶4 and 3∶4 were fabricated for multilayer AA1100/AA7075 LMCs by hot accumulative roll bonding(ARB)technology.The bending fracture charac-teristics of AA1100/AA7075 LMCs with different thickness ratios and numbers of constituent layers were investigated.The research results indicated that AA1100/AA7075 LMCs with a low thickness ratio exhib-ited better bending ductility and toughness than those with a high thickness ratio,which was attributed to the crack growth resistance caused by the thickness of the soft AA1100 layer.The toughening mech-anism introduced by crack deflection or arresting contributed to the enhancement in the toughness of the LMCs compared with that of the single 7075Al layer.The bonding interfaces of AA1100/AA7075 LMCs with different numbers of layers are continuous and straight due to the high ARB temperature.A decrease in bending toughness was observed as the number of layers increased.Unlike LMCs with a low number of layers,crack deflection or interface delamination is also considered a main toughening mechanism in dissimilar LMCs in addition to the thickness effect.

Key words

Laminated metal composite/Mechanical properties/Bending/Fracture behavior/Toughening mechanism

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基金项目

National Natural Science Foundation of China(51421001)

Fundamental Re-search Funds for the Central Universities(2019CDQYCL001)

Fundamental Re-search Funds for the Central Universities(2019CDCGCL204)

Fundamental Re-search Funds for the Central Universities(2020CDJDPT001)

Research Project of State Key Laboratory of Vehicle NVH and Safety Technology(NVHSKL-201706)

出版年

2022

材料科学技术(英文版)

中国金属学会中国材料研究学会中国科学院金属研究所

材料科学技术(英文版)

CSTPCDCSCDSCI

影响因子：0.657

ISSN：1005-0302

被引量1

参考文献量42

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