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所属单位：材料科学与技术学院
发表刊物：JOURNAL OF MANUFACTURING PROCESSES
关键字：Friction stir processing 5083Al Ti particles Composite Microstructure Tensile properties
摘要：The hard metallic particle as reinforcements can improve the strength of Al matrix without severely sacrificing its ductility. However, it is technically challenging to fabricate metallic particle reinforced aluminum matrix composites (AMCs) for easy reactivity of Al with most metals. In the present work, friction stir processing (FSP) was used to disperse titanium particles into 5083 Al matrix to fabricate AMCs. Especially, FSP was performed in water to better inhibit the Al/Ti interfacial reaction and the recrystallized grain growth. The effects of the external water on the microstructure and mechanical properties of FSPed AMCs were investigated. Results showed that the external water significantly lowered peak temperature and increased cooling rate, which not only rapidly reduced material flow, but also effectively inhibited grain growth, thereby creating finer grains about 1 pm. Also, an excellent Al/Ti interfacial bonding consisting of an element solid solution was obtained in both FSPed composites. Tensile test results indicated that water-FSPed AMCs possessed the higher yield strength (265 MPa) and ultimate tensile strength (423 MPa) compared with the 5083Al matrix (YS: 198 MPa, UTS: 301 MPa) and the air-FSPed AMCs (YS: 236 MPa, UTS: 383 MPa). Moreover, an appreciable amount of ductility (14.9%) was retained despite of their evidently increased strength. (C) 2017 The Society of Manufacturing Engineers. Published by Elsevier Ltd. All rights reserved.
ISSN号：1526-6125
是否译文：否
发表时间：2017-12-01
合写作者：Huang, Guoqiang
通讯作者：沈以赴