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Production Engineering

, Volume 10, Issue 4–5, pp 433–441 | Cite as

Repairing parts from nickel base material alloy by laser cladding and ball end milling

  • V. Böß
  • B. Denkena
  • V. Wesling
  • S. Kaierle
  • F. Rust
  • D. Nespor
  • B. Rottwinkel
Production Process

Abstract

Due to rising costs of raw material, companies of the aerospace industry increasingly seek to repair components of aircraft engines instead of replacing them. Particularly the clad repair of turbine blades made of high strength nickel-base alloys with directionally solidified or single crystalline structure is a difficult issue, especially due to high requirements regarding the conditions of the final part surface. The present work deals with the question whether the prediction of surface and subsurface conditions, e.g. surface topography and residual stresses, is possible after repairing the inhomogeneous nickel-base alloy Rene 80. For this purpose, laser deposition cladding is applied for the polycrystalline Rene 80, using the filler material Rene 142. In the following re-contouring process, the claddings are milled with a ball end mill cutter. The influence of the inhomogeneous base material and the shape of the clad on the cutting forces as well as the final part surface are experimentally investigated. Superficial residual stresses are measured and evaluated. The cutting forces and the final surface reveal characteristic variations in the area of the material deposition and the dendrites. A geometric process simulation shows that the prediction of cutting forces and surface conditions for the polycrystalline material is only possible to some extent.

Keywords

Laser welding Ball end milling Re-contouring Process design 

Notes

Acknowledgments

The authors thank the German Research Foundation (DFG) for the financial support within the Collaborative Research Center 871: Regeneration of complex capital goods, as well as the Institute for Connecting and Welding Technologies (IFS) for carrying out measurements on claded specimens.

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Copyright information

© German Academic Society for Production Engineering (WGP) 2016

Authors and Affiliations

  • V. Böß
    • 1
  • B. Denkena
    • 1
  • V. Wesling
    • 2
  • S. Kaierle
    • 3
  • F. Rust
    • 1
  • D. Nespor
    • 1
  • B. Rottwinkel
    • 3
  1. 1.Leibniz Universitat HannoverHannoverGermany
  2. 2.Technische Universität Clausthal, Institut für Schweißtechnik und trennende FertigungsverfahrenClausthalGermany
  3. 3.Laser Zentrum Hannover e.V.HannoverGermany

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