Characterising the integrity of machined surfaces in a powder nickel alloy used in aircraft engines

M. C. Hardy, C. R.J. Herbert, J. Kwong, W. Li, D. A. Axinte, A. R.C. Sharman, A. Encinas-Oropesa, P. J. Withers

Research output: Journal PublicationConference articlepeer-review

20 Citations (Scopus)

Abstract

This paper describes methods for evaluating and characterising the integrity of machined surfaces in a powder nickel alloy that is being used for disc applications in aircraft engines. It initially reviews techniques for inspecting the effects of process parameters on surface integrity for hole making and finish turning and then presents the findings of work that has been conducted to understand the influence of machining anomalies on fatigue life. The techniques considered for characterising surface integrity include surface inspection, surface roughness measurement, metallographic assessment of etched surfaces using light microscopy and microhardness measurement. More novel techniques are then discussed, exploiting advanced electron microscopy, nano-indentation and x-ray diffraction methods. These are capable of understanding the effects of machining processes on microstructure and quantifying the depth to which machining processes can change the material microstructure.

Original languageEnglish
Pages (from-to)411-416
Number of pages6
JournalProcedia CIRP
Volume13
DOIs
Publication statusPublished - 2014
Externally publishedYes
Event2nd CIRP Conference on Surface Integrity, CSI 2014 - Nottingham, United Kingdom
Duration: 28 May 201430 May 2014

Keywords

  • Low cycle fatigue
  • Nickel alloy
  • RR1000
  • Scanning electron microscope
  • Surface integrity
  • X-ray diffraction

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Industrial and Manufacturing Engineering

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