Ultrasonic machining response and improvement mechanism for differentiated bio-CoCrMo alloys manufactured by directed energy deposition  

作　　者：Hao Lu Lida Zhu Pengsheng Xue Boling Yan Yanpeng Hao Zhichao Yang Jinsheng Ning Chuanliang Shi Hao Wang 

机构地区：[1]School of Mechanical Engineering and Automation,Northeastern University,Shenyang 110819,China [2]Department of Mechanical Engineering,College of Design and Engineering,National University of Singapore,9 Engineering Drive 1,Singapore 117575,Singapore

出　　处：《Journal of Materials Science & Technology》2024年第26期226-243,共18页材料科学技术(英文版)

基　　金：supported by the National Natural Science Foun-dation of China(Nos.51975112 and52375412);the Fundamental Research Funds for Central Universities(No.N2203003);the Singapore Ministry of Education(Grant No.A-8001225-00-00).

摘　　要：The post-fabrication machining of additively manufactured biomedical parts is essential for achieving dimensional accuracy.However,conventional machining encounters issues in dealing with the growing demand for surface quality and the inherent defects of parts.To improve the machining quality,the correlation between material variations and ultrasonic machining quality is investigated in terms of material properties.This variation induced by additive strategies is experimentally revealed and the mechanism for this difference is further explained through molten pool dynamic simulation.In addition,to elucidate the unique machining advantages,a hybrid cutting simulation is implemented to analyze the improving behavior of ultrasonic vibration on the common defects of additively manufactured parts.Taken together,this study demonstrates the role that material property differences play in post-fabrication machining and validates the superiority of ultrasonic machining as a post-fabrication machining method for additively manufactured parts.

关 键 词：Additive manufacturing Ultrasonic vibration Bio-CoCrMo Simulation DEFECTS 

分 类 号：TG1[金属学及工艺—金属学]