摘要
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%。
Nano-sized SiCw reinforced ZL114A A1 matrix composite was prepared by friction stir processing. The microstructure and properties of the composite were analyzed. The results show that, the friction stir zone with compact structure and no obvious defects is formed in 30 mm× 6 mm range. The grain size is fine in the friction stir zone. The nano-sized SiCw uniformly distributes in the centre of friction stir zone. T6 heat treatment strengthen effect is not obvious for the composite. The toughening is the major strengthening mechanism by SiCw. The hardness and tensile strength of the center of friction stir zone has a little decrease. But the elongation of the composite is greatly enhanced, which is improved by 111.4% compared with that of base metal.
出处
《热加工工艺》
CSCD
北大核心
2013年第4期123-125,共3页
Hot Working Technology
关键词
搅拌摩擦加工
纳米SiCw
铝基复合材料
显微组织
韧化
friction stir processing
nano-sized SiCw
aluminum matrix composite
microstructure
toughening
