Monitoring laser cleaning of titanium alloys by probe beam reflection and emission spectroscopy

D. J. Whitehead, P. L. Crouse, M. J J Schmidt, L. Li, M. W. Turner, A. J E Smith

    Research output: Contribution to journalArticlepeer-review


    Studies have shown excimer laser cleaning to be an effective non-chemical alternative method for removing contaminants from surfaces of titanium alloys in preparation for electron beam welding and diffusion bonding, with reference to aerospace applications. Among several important criteria for process acceptability, is the absence of oxide formation. This paper investigates the viability of using a probe beam reflection (PBR) system and laser plume emission spectroscopy (PES) for detection of incipient oxide formation on three typical aerospace titanium alloys, viz. Ti64, Ti6246, and IMI834. These diagnostic techniques have been shown to be capable of sensing different components in the emission plume and yield quantitative results. Results from this work correlate closely with previously reported cleaning mechanisms. The oxidation threshold, as well as the operating window for successful decontamination, is discussed. © 2008 Springer-Verlag.
    Original languageEnglish
    Pages (from-to)123-127
    Number of pages4
    JournalApplied Physics A: Materials Science and Processing
    Issue number1
    Publication statusPublished - Oct 2008


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