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.
© 2013 Optical Society of America
Original Manuscript: April 3, 2013
Revised Manuscript: May 20, 2013
Manuscript Accepted: May 21, 2013
Published: June 21, 2013
Benjamin P. Thiesing, Christopher J. Mann, and Sebastien Dryepondt, "High temperature measurements of martensitic transformations using digital holography," Appl. Opt. 52, 4426-4432 (2013)