The effect of process parameters on residual stresses within an inconel 718 part produced by the Direct Laser Deposition process

Andrew J. Pinkerton, Judith Shackleton, Richard Moat, Lin Li, Philip Withers, Michael Preuss, Jeffrey Allen, Paul Hilton, Robert Folwell

Research output: Contribution to conferencePaper

6 Citations (Scopus)


The residual stress fields generated within a laser deposition metal component or added feature have the potential to significantly affect its properties and performance. Stresses play a major role in determining the initial levels of distortion, in both the added part and the initial substrate material, and affect both short-time properties, such as ductility, and long-time properties, such as creep and corrosion resistance. Their control is therefore essential for the production quality demanded in high performance aerospace components. In this work, a series of geometrically simple components was additively manufactured from Inconel 718 powder using a coaxial diode laser deposition system under a range of process parameters. The residual surface stresses arising were measured using x-ray diffraction techniques and the variations in them with surface position and process parameters are shown. The formation of these stresses and their relationship to Direct Laser Deposition process parameters are discussed.

Original languageEnglish
Number of pages10
Publication statusPublished - 2005
Externally publishedYes
EventInternational Congress on Applications of Lasers and Electro-Optics 2005 - Miami, United States of America
Duration: 31 Oct 20053 Nov 2005
Conference number: 24th


ConferenceInternational Congress on Applications of Lasers and Electro-Optics 2005
Abbreviated titleICALEO 2005
CountryUnited States of America

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