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用搅拌摩擦加工法制备纳米SiCw增强ZL114A铝基复合材料,并对其组织及性能进行分析。结果表明,在30 mm×6mm形成了结构致密,无明显疏松、孔洞的搅拌摩擦复合区,复合区晶粒细小,搅拌摩擦中心区SiCw分布较均匀。该复合材料经T6热处理后强化效果不明显,SiCw主要起韧化作用,搅拌摩擦中心区硬度及抗拉强度略有下降,但伸长率得到改善,比基材提高111.4%。
Preparation of nano-SiCw reinforced ZL114A aluminum matrix composites by friction stir process and their microstructure and properties were analyzed. The results show that SiCw distribution in the center of the friction stir zone is uniform at 30 mm × 6 mm, with compact structure and no obvious porosity and loose friction and friction zone. The T6 heat treatment of the composite after the strengthening effect is not obvious, SiCw mainly toughening, friction and friction center hardness and tensile strength decreased slightly, but the elongation improved, than the substrate increased by 111.4%.