Residual stresses in high speed turning of nickel-based superalloy

R. L. Peng, J. M. Zhou, S. Johansson, A. Bellinius, V. Bushlya, J. E. Stahl

Research output: Contribution to specialist publication or newspaperSpecialist publication articleResearch

Abstract

Residual stresses induced by machining operations can be critical for the performance and lifetime of the machined components. Tis paper investigated the influence of cutting conditions, including the use of cutting fluid, cutting speed and tool flank wear, on the residual stresses in high speed turning of Inconel 718 alloy. X-ray diffraction measurements revealed characteristic residual stress distributions with tensile stresses in a thin surface layer and compressive stresses in a much thicker subsurface layer in all investigated samples. However, the magnitude of the surface tensile stresses and subsurface compressive stresses as well as the size of the tension and compression zone depended on the cutting parameters. Surface tensile residual stresses over 1600 MPa and 1400 MPa were induced by tool flank wear and increased cutting speed, respectively, in dry turning. The effect of cutting induced local plasticity and temperature increase on the observed residual stress distributions was analyzed based on microstructural study by electron channeling contrast imaging and electron backscatter diffraction.

Original languageEnglish
Pages46-53
Number of pages8
Volume69
No.1
Specialist publicationHTM - Journal of Heat Treatment and Materials
DOIs
Publication statusPublished - 2014 Feb 1

Subject classification (UKÄ)

  • Materials Engineering

Free keywords

  • Dry cut
  • High speed turning
  • Inconel 718
  • Residual stresses
  • Tool wear

Fingerprint

Dive into the research topics of 'Residual stresses in high speed turning of nickel-based superalloy'. Together they form a unique fingerprint.

Cite this