标题：Experimental study of surface integrity and fatigue life in the face milling of Inconel 718
作者：Wang, Xiangyu; Huang, Chuanzhen; Zou, Bin; Liu, Guoliang; Zhu, Hongtao; Wang, Jun
作者机构：[Wang, Xiangyu; Huang, Chuanzhen; Zou, Bin; Liu, Guoliang; Zhu, Hongtao; Wang, Jun] Shandong Univ, Sch Mech Engn, Ctr Adv Jet Engn Technol CaJET, Jina 更多
通讯作者地址：[Huang, CZ]Shandong Univ, Sch Mech Engn, Ctr Adv Jet Engn Technol CaJET, Jinan 250061, Shandong, Peoples R China.
来源：FRONTIERS OF MECHANICAL ENGINEERING
关键词：roughness; hardness; residual stress microstructure; fatigue life
摘要：The Inconel 718 alloy is widely used in the aerospace and power industries. The machining-induced surface integrity and fatigue life of this material are important factors for consideration due to high reliability and safety requirements. In this work, the milling of Inconel 718 was conducted at different cutting speeds and feed rates. Surface integrity and fatigue life were measured directly. The effects of cutting speed and feed rate on surface integrity and their further influences on fatigue life were analyzed. Within the chosen parameter range, the cutting speed barely affected the surface roughness, whereas the feed rate increased the surface roughness through the ideal residual height. The surface hardness increased as the cutting speed and feed rate increased. Tensile residual stress was observed on the machined surface, which showed improvement with the increasing feed rate. The cutting speed was not an influencing factor on fatigue life, but the feed rate affected fatigue life through the surface roughness. The high surface roughness resulting from the high feed rate could result in a high stress concentration factor and lead to a low fatigue life.