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金属材料表面自身纳米化,即在材料自身表面形成具有纳米结构的表面层。纳米结构表层与基体之间没有明显的界面,处理前后材料的外形尺寸基本没变,一方面克服了目前三维大尺寸纳米晶体材料制备的技术困难,另一方面又将纳米晶体材料的优异性能与传统金属材料相结合。近几年来,越来越多的国内外学者开始将超声技术应用在金属表面自身纳米化过程中,以方便、快速、低成本地在金属表面大规模获得纳米结构层。本文简要介绍了超声实现金属表面自身纳米化技术的基本原理及特点,综述了超声表面纳米化对金属材料的力学、腐蚀、疲劳等性能的影响。
The surface of the metal material itself is nano-sized, that is, a surface layer with a nanostructure is formed on the surface of the material itself. There is no obvious interface between the nanostructured surface and the substrate. The external dimensions of the nanostructured nanostructured nanostructured nanostructured nanostructured nanocomposite have not changed. Traditional metal materials combined. In recent years, more and more scholars at home and abroad have begun to apply ultrasonic technology to the nanocrystallization of the metal surface to obtain the nanostructure layer on the metal surface conveniently, rapidly and at low cost. This paper briefly introduces the basic principles and characteristics of the nano-technology of metal surface by ultrasound, and summarizes the influence of ultrasonic surface nano-technology on the mechanical, corrosion, fatigue and other properties of metal materials.