Skip to Main content Skip to Navigation

Etude mécanique et métallurgique du perçage d’une nuance d’acier inoxydable austénitique réfractaire

Abstract : In the case of the turbocharger housings machining (milling, drilling and tapping operations) made of heatresistant austenitic stainless steel (HRASS), the tools life is greatly altered compared to standard steels ofequivalent mechanical resistance. Therefore, the machining cost of such pieces, including the cutting tools,constitutes a significant amount of their total cost. Concerning the drilling, the severity of the machining isincreased and even more since it relies on stepped, complex and expensive one-piece tools.This PhD project aims to develop a new cutting geometry optimized for the HRASS drilling. In thisperspective, a characterization of the cutting tool is carried out based on one hand on the local cutting forcesanalysis from a global cutting forces discretization during the drill tip penetration, and also on the initial chipformation. Then, an in-situ analysis of the cumulative strain hardening of the machined subsurface layer is alsocarried out using an identification of the incremental equivalent plastic strain. All the performed analysescontribute to the understanding of the strain hardening/machinability relationship for the tool life improvementof the HRASS dedicated drills.
Complete list of metadatas

Cited literature [115 references]  Display  Hide  Download
Contributor : Abes Star :  Contact
Submitted on : Thursday, September 24, 2020 - 11:39:08 AM
Last modification on : Friday, September 25, 2020 - 3:08:53 AM


Version validated by the jury (STAR)


  • HAL Id : tel-02947968, version 1


Rabiae Arif. Etude mécanique et métallurgique du perçage d’une nuance d’acier inoxydable austénitique réfractaire. Autre [cond-mat.other]. HESAM Université, 2020. Français. ⟨NNT : 2020HESAE013⟩. ⟨tel-02947968⟩



Record views


Files downloads