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Wear mechanisms of silicon carbide-whisker-reinforced alumina (Al2O3-SiCw) cutting tools when high-speed machining aged Alloy 718

Bushlya, Volodymyr LU ; Zhou, Jinming LU ; Avdovic, Pajazit and Ståhl, Jan-Eric LU (2013) In International Journal of Advanced Manufacturing Technology 68(5-8). p.1083-1093
Abstract
The paper is aimed at the identification and characterization of wear mechanisms of SiC whisker-reinforced alumina when turning aged Alloy 718 under different cutting conditions and when machining dry and with coolant. Secondary and backscatter electron microscopy accompanied by focus ion beam milling and EDX techniques were used for analysis of worn-out tools. Notch wear on the major cutting edge was found to consist of two notches: depth-of-cut notch and secondary notch located outside the chip area. The last was found to be governed by adhesion and attrition associated with adverse chip flow conditions. Formation of a minor notch was related to attrition by the defects found on the machined surface. Diffusion of Ni, Fe, and Cr into SiC... (More)
The paper is aimed at the identification and characterization of wear mechanisms of SiC whisker-reinforced alumina when turning aged Alloy 718 under different cutting conditions and when machining dry and with coolant. Secondary and backscatter electron microscopy accompanied by focus ion beam milling and EDX techniques were used for analysis of worn-out tools. Notch wear on the major cutting edge was found to consist of two notches: depth-of-cut notch and secondary notch located outside the chip area. The last was found to be governed by adhesion and attrition associated with adverse chip flow conditions. Formation of a minor notch was related to attrition by the defects found on the machined surface. Diffusion of Ni, Fe, and Cr into SiC whiskers was found to degrade them and facilitate adhesion. Chemical wear mechanisms were found to be responsible for degradation and decomposition of whiskers and formation of tribolayer on tool surfaces, which in turn was related to the reduced adhesion of Alloy 718 on the tool. Cracking on the tool rake and localized plastic deformation were found to further accelerate tool deterioration. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Alloy 718, Whisker-reinforced alumina, Notch wear, Diffusion, Chemical, wear
in
International Journal of Advanced Manufacturing Technology
volume
68
issue
5-8
pages
1083 - 1093
publisher
Springer
external identifiers
  • wos:000324276600011
  • scopus:84888352917
ISSN
0268-3768
DOI
10.1007/s00170-013-4899-8
language
English
LU publication?
yes
id
75f56cfb-d0cd-49ad-a5a4-d830bd570b22 (old id 4101976)
date added to LUP
2016-04-01 13:15:01
date last changed
2020-01-15 03:23:16
@article{75f56cfb-d0cd-49ad-a5a4-d830bd570b22,
  abstract     = {The paper is aimed at the identification and characterization of wear mechanisms of SiC whisker-reinforced alumina when turning aged Alloy 718 under different cutting conditions and when machining dry and with coolant. Secondary and backscatter electron microscopy accompanied by focus ion beam milling and EDX techniques were used for analysis of worn-out tools. Notch wear on the major cutting edge was found to consist of two notches: depth-of-cut notch and secondary notch located outside the chip area. The last was found to be governed by adhesion and attrition associated with adverse chip flow conditions. Formation of a minor notch was related to attrition by the defects found on the machined surface. Diffusion of Ni, Fe, and Cr into SiC whiskers was found to degrade them and facilitate adhesion. Chemical wear mechanisms were found to be responsible for degradation and decomposition of whiskers and formation of tribolayer on tool surfaces, which in turn was related to the reduced adhesion of Alloy 718 on the tool. Cracking on the tool rake and localized plastic deformation were found to further accelerate tool deterioration.},
  author       = {Bushlya, Volodymyr and Zhou, Jinming and Avdovic, Pajazit and Ståhl, Jan-Eric},
  issn         = {0268-3768},
  language     = {eng},
  number       = {5-8},
  pages        = {1083--1093},
  publisher    = {Springer},
  series       = {International Journal of Advanced Manufacturing Technology},
  title        = {Wear mechanisms of silicon carbide-whisker-reinforced alumina (Al2O3-SiCw) cutting tools when high-speed machining aged Alloy 718},
  url          = {https://lup.lub.lu.se/search/ws/files/3257042/4732900.pdf},
  doi          = {10.1007/s00170-013-4899-8},
  volume       = {68},
  year         = {2013},
}