Abstract：The microstructure and corrosion properties of a novel Al-based amorphous reinforced aluminum matrix composite fabricated by friction stir processing (FSP) were studied by scanning electron microscope(SEM), transmission electron microscope(TEM) and electrochemical corrosion test methods. The test results show that the composite exhibits the typical layered structure with a combination of the base metal and the amorphous strip via the FSP, and shows a large amount of nanosized ultrafine structure which are mainly composed of the α-Al and α-Al amorphous structure with Al-Cu-Mg series precipated phase existing in the composite. The tensile strength of composite is improved a lot compared with the base metal. The electrochemical corrosion behavior of the composite with amorphous strip is also improved compared with that without amorphous strip, but, in both cases, the corrosion bebaviour is lower than the base metal.
李文龙, 夏春, 邢丽, 等. 搅拌针形状对搅拌摩擦加工制备CNTs/铝基复合材料均匀性的影响[J].材料工程, 2014, (1): 75-78.LI Wen-long, XIA Chun, XING Li, et al. Influence of pin shape on homogeneity of CNTs distribution in CNTs/Al composite fabricated by friction stir processing[J]. Journal of Materials Engineering, 2014, (1):75-78.
MISHRA R S, MA Z Y, CHARIT I. Friction stir processing: a novel technique for fabrication of surface composite[J]. Materials Science and Engineering A, 2003, 341 (1-2): 307-310.
骆蕾, 沈以赴, 李博, 等. 搅拌摩擦焊搭接法制备TC4钛合金表面Al涂层及其高温氧化行为[J]. 金属学报, 2013, 49 (8): 996-1002.LUO Lei, SHEN Yi-fu, LI Bo, et al. Preparation and oxidation behaviour of aluminized coating on TC4 titanium alloy via friction stir lap welding method[J]. Acta Metallurgica Sinica, 2013, 49 (8): 996-1002.
EI-DANAF E A, EI-RAYES M M, SOlIMAN M S. Friction stir processing: An effective technique to refine grain structure and enhance ductility[J]. Materials and Design, 2010, 31 (3): 1231-1236.
CAVALIERE P. Mechanical properties of friction stir processed 2618/Al2O3/20p metal matrix composite[J]. Composites Part A, 2005, 36 (12): 1657-1665.
MORISADA Y, FUJII H, NAGAOKA T, et al. MWCNTs/AZ31 surface composites fabricated by friction stir processing[J]. Materials Science and Engineering A, 2006, 419 (1-2): 344-348.
INOUE A. Stabilization of metallic super-cooled liquid and bulk amorphous alloys[J]. Acta Materialia, 2000, 48 (1): 279-306.
TAKIGAWA Y, KOBATA J, CHUNG S W, et al. Microstructural change by friction stir processing in Zr-Al-Cu-Ni bulk metallic glass[J]. Materials Transactions, 2007, 48 (7): 1580-1583.
KOBATA J, TAKIGAWA Y, HUNG S W, et al. Effects of size and volume fraction of precipitated crystalline phase induced by friction stir processing on hardness in Zr-Al-Ni-Cu bulk metallic glass[J]. Materials Transactions, 2007, 48 (9): 2409-2413.
刘鹏, 史清宇, 边秀房, 等. 新型非晶增强铝基复合材料的制备及组织性能[J]. 焊接学报, 2009, 30(10): 13-16. LIU Peng, SHI Qing-yu, BIAN Xiu-fang, et al. Microstructure of a novel Al-based amorphous reinforced aluminum metal matrix composite[J]. Transations of the China Welding Institution, 2009, 30 (10): 13-16.
RHODES C G, MAHONEY M W, BINGEL W H, et al. Effects of friction stir welding on microstructure of 7075 aluminum[J]. Scripta Materialia, 1997, 36(1): 69-75.
SU J Q, NELSON T W, STERLING C J. A new route to bulk nanocrystalline materials[J]. Journal of Materials Research, 2003, 18 (8): 1757-1760.
JIANG X P, WANG X Y, LI J X, et al. Enhancement of fatigue and corrosion properties of pure Ti by sandblasting[J]. Materials Science and Engineering A, 2006, 429 (1-2): 30-35.