搅拌摩擦加工工艺及其对性能的影响研究

Research Status in Technology and Properties of Friction Stir Processing

搅拌摩擦加工是一种全新的固相加工表面改性技术,采用该技术制备晶粒尺寸为纳米级的细晶,其强度和塑性都得到很大提高。介绍了搅拌摩擦加工的基本原理、工艺参数及搅拌区的"洋葱环"现象,详细综述了搅拌摩擦加工工艺以及对材料组织和力学、腐蚀性能的影响规律,并指出了其发展进程中存在的主要问题。针对不同材料确定系列规范和标准化的加工工艺参数,是搅拌摩擦加工技术从实验室走向实际应用的瓶颈。

Friction stir processing （FSP） was a new solid-state processing technology.The grain size after developed by FSP was nano-grain,which exhibited enhanced strength and plasticity.The principle of FSP,the process parameters and the formation of onion rings are reviewed.The effects of FSP process on mechanical and corrosion properties of materials are also summarized in detail.The main problems in FSP are also pointed out.An inventive technique to fabricate materials with homogeneous microstructure by adopting certain process parameter is pivotal for its applications.