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Vibration, tool wear and surface roughness characteristics in turning of Inconel 718 alloy with ceramic insert under LN2 machining

Authors
  • Mou, Wenping1
  • Zhu, Shaowei2
  • 1 Nanjing University of Aeronautics and Astronautics, Nanjing, 210016, China , Nanjing (China)
  • 2 NC Machining Plant, Chengdu Aircraft Industrial (Group) Co., Ltd, Chengdu, 610092, China , Chengdu Aircraft Industrial (Group) Co., Ltd, Chengdu (China)
Type
Published Article
Journal
Journal of the Brazilian Society of Mechanical Sciences and Engineering
Publisher
Springer Berlin Heidelberg
Publication Date
Jun 16, 2020
Volume
42
Issue
7
Identifiers
DOI: 10.1007/s40430-020-02438-8
Source
Springer Nature
Keywords
License
Yellow

Abstract

Liquid nitrogen (LN2) machining is considered as a safe, clean, and environmentally friendly machining process. This paper aims to investigate the vibration, tool wear and surface roughness mechanism of the ceramic insert during turning of Inconel 718 alloy under dry machining and LN2 machining. The experiments were performed at three cutting speeds (100, 150, 200 m/min), feed rates (0.04, 0.08, 0.12 mm/rev) and depths of cut (0.2, 0.4, 0.6 mm). The experiment results show better machinability and longer tool life in LN2 machining. The vibration acceleration is reduced by 14–32%. A 17–34% reduction of workpiece surface roughness is observed. Flank wear and notch are the predominant wear forms both in LN2 machining and dry machining, and 16–34% reduction of flank wear is noted in LN2 machining.

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