期刊
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
卷 490, 期 1-2, 页码 319-327出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.msea.2008.01.034
关键词
multilayer aluminium structures; interfacial strength; fracture behaviour; delamination; hot roll-bonding
类别
资金
- CICYT [MAT2003-01172]
- Spanish Ministry of Education and Science
The microstructure and mechanical properties, with emphasis in the impact fracture toughness behaviour, of two multilayer laminate materials have been investigated. The multilayer materials are constituted by alternated sheets of pure aluminium (Al 1200 or Al 1050) and high strength Al 7075 alloy. Stacked layers of these alloys have been successfully joined using two processing routes with different total hot rolling strains. Both laminates have been tested at room temperature under impact Charpy tests, three-point bend tests and shear tests on the interfaces. Both laminates exhibited more than eight times improvement in impact fracture toughness over the monolithic Al 7075-T6. The toughness increase in the higher rolling strained laminate is almost entirely due to crack blunting mechanism, while in the lower strained laminate, crack deflection by delamination and crack renucleation processes were active. (c) 2008 Elsevier B.V. All rights reserved.
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