Enhanced Understanding and Expertise of Structural Defects In Metals

National Laboratory: 
Sandia National Laboratories
Characterization Class: 
Mechanical Behavior of Materials
Computational Tools Class: 
Structure-Properties
Description: 

Sandia National Laboratories' staff have the experience and expertise in investigating the mechanisms governing strain localization and dislocation transmission at interfaces of metals. This includes extended knowledge regarding the structure of material defects in crystalline metals (e.g., cracks, dislocations, stacking faults, or grain boundaries), how these defects affect material deformation, and methods for extracting the quantitative information necessary for constructing predictive models of material behavior.

Unique Aspects: 

SNL's expertise in interfaces and interface science affords the ability to combine atomic and mesoscale imaging with theory and modeling at nano and micro length scales, as well as to provide scientific understanding that can be used in guiding alloy design. SNL staff also collaborate closely with people who have manufacturing responsibilities both in structural metals and lightweight structures, especially in offering guidance about how to optimize manufacturing processes and the relationships between microstructure and properties.

Availability: 

SNL staff are available for collaboration and consultation with academic and industrial partners.

Single Point of Contact: 

Name: Douglas Medlin
Email: dlmedli@sandia.gov
Phone: 925- 294-2825

References: 
  1. Medlin, Douglas L., and N. Y. C. Yang. "Interfacial step structure at a (0001) basal twin in Bi2Te3." Journal of electronic materials 41.6 (2012): 1456-1464.
  2. Medlin, Douglas L., and G. J. Snyder. "Atomic-scale interfacial structure in rock salt and tetradymite chalcogenide thermoelectric materials." JOM 65.3 (2013): 390-400.
  3. Clark, Blythe G., et al. "Characterization of Void-Dominated Ductile Failure in Pure Ta." Microscopy and Microanalysis 21.S3 (2015): 1163-1164.
Supporting Document(s):