Localized heating of metals and alloys using a focused laser beam in ambient atmosphere produces dielectric oxide layers that have characteristic optical appearances including different colors. Nanoindentation probed the deformation and fracture of laser-fabricated oxides on 304L stainless steel. Conductive nanoindentation measured electrical contact resistance (ECR) of the same colored oxides indicating a correlation between laser exposure, conductance during loading, current-voltage (I-V) behavior at constant load, and indentation response. Microscopy and X-ray diffraction examined the microstructure and chemical composition of the oxides. Combining techniques provides a unique approach for correlating mechanical behavior and the resulting performance of the films in conditions that cause wear.
|Original language||English (US)|
|Title of host publication||Properties and Processes at the Nanoscale - Nanomechanics of Material Behavior|
|Number of pages||6|
|State||Published - 2012|
|Event||2011 MRS Fall Meeting - Boston, MA, United States|
Duration: Nov 28 2011 → Dec 2 2011
|Name||Materials Research Society Symposium Proceedings|
|Other||2011 MRS Fall Meeting|
|Period||11/28/11 → 12/2/11|
Bibliographical noteFunding Information:
This work was supported by the Defense Threat Reduction Agency, Basic Research Award # IACRO 10-4257I, to Washington State University sub-contracted through Sandia National Laboratories, and NSF Grant NSF/DMR-0946337. Sandia National Laboratories is a multiprogram laboratory managed and operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin Company, for the United States Department of Energy’s National Nuclear Security Administration under contract DE-AC04-94AL85000. The authors would like to thank Paul Kotula, Mark Rodriguez, Vitalie Stavila, Ryan Nishimoto, Jeff Chames, and Ray Friddle for their work and helpful discussions on microscopy and XRD.