title: High temperature measurements of martensitic transformations using digital holography.
abstract: During thermal cycling of nickel-aluminum-platinum (NiAlPt) and single crystal iron-chromium-nickel (FeCrNi) alloys, the structural changes associated with the martensite to austenite phase transformation were measured using dual-wavelength digital holography. Real-time in situ measurements reveal the formation of striations within the NiAlPt alloy at 70°C and the FeCrNi alloy at 520°C. The results demonstrate that digital holography is an effective technique for acquiring noncontact, high precision information of the surface evolution of alloys at high temperatures.
authors.affiliation: Department of Physics and Astronomy, Northern Arizona University, Flagstaff, Arizona 86011, USA. bpt6@nau.edu
authors.forename: Benjamin P
authors.initials: BP
authors.lastname: Thiesing
authors.forename: Christopher J
authors.initials: CJ
authors.lastname: Mann
authors.forename: Sebastien
authors.initials: S
authors.lastname: Dryepondt