《一种新螺杆挤压法从6063铝合金和Mg混合颗粒制备AlMg复合材料（英文版）》.pdfVIP

Trans. Nonferrous Met. Soc. China 24(2014) 3886−3893 Novel method of screw extrusion for fabricating Al/Mg (macro-) composites from aluminum alloy 6063 and magnesium granules Kristian Grøtta SKORPEN1 1 1,2 1,3 , Eirik MAULAND , Oddvin REISO , Hans Jørgen ROVEN 1. Department of Materials Science and Engineering, Norwegian University of Science and Technology, Trondheim N-7491, Norway; 2. RD Materials Technology, Hydro Aluminium AS, Sunndalsora 6600, Norway; 3. Center for Advanced Materials, Qatar University, Doha 2713, Qatar Received 17 October 2013; accepted 17 November 2014 Abstract: A novel method of screw extrusion was used for producing a bimetal composite Al/Mg from granules containing aluminium alloy 6063 (AA6063) and commercial pure magnesium. Up to 12.5% (mass fraction) pure magnesium was added to the aluminium alloy. In general, the material consisted of a fine grained microstructure. In addition to the phases originating from the input materials, intermetallic phases were observed as islands consisting of the Al Mg phase surrounded by γ-Mg Al , throughout 2 3 17 12 the microstructure. The mechanical properties of the extruded material showed a gradual increase in strength with increasing the addition of Mg. The highest registered UTS, well above 350 MPa, was observed for the material containing 10% Mg. Examinations of the fracture surfaces indicated that increasing the magnesium content led to a