期刊
PHILOSOPHICAL MAGAZINE LETTERS
卷 88, 期 6, 页码 459-466出版社
TAYLOR & FRANCIS LTD
DOI: 10.1080/09500830802186938
关键词
aluminium alloys; nanostructures; segregation
Microstructural features and mechanical properties of an Al-Mg-Si alloy processed by high-pressure torsion (HPT) have been investigated using transmission electron microscopy, X-ray diffraction, three-dimensional atom probe, tensile tests and micro-hardness measurements. It is shown that HPT processing of the Al-Mg-Si alloy leads to a much stronger grain size refinement than of pure aluminium (down to 100 nm). Moreover, massive segregation of alloying elements along grain boundaries is observed. This nanostructure exhibits a yield stress even two times higher than that after a standard T6 heat treatment of the coarse-grained alloy.
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