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Opportunity at National Institute of Standards and Technology (NIST)

Materials characterization and performance of additively-manufactured alloys

Location

Material Measurement Laboratory, Materials Science and Engineering Division

RO# Location
50.64.21.C0192 Gaithersburg, MD

Please note: This Agency only participates in the February and August reviews.

Advisers

Name E-mail Phone
Levine, Lyle Edward lyle.levine@nist.gov 301.975.6032
Stoudt, Mark R. mark.stoudt@nist.gov 301.975.6025

Description

The extreme processing conditions of metal additive manufacturing create inhomogeneous materials that can include intense localized compositional gradients, elongated microstructures, highly anisotropic local and macroscopic stresses that approach the flow stress, and unexpected crystalline phases.  This research will use state-of-the-art materials characterization capabilities to correlate local microstructures (before and after post-build thermal-mechanical processing) with location-specific, in situ thermal measurements during the build process.  Material characterization includes SEM and TEM methods, lab and synchrotron X-ray diffraction, DSC, dilatometry, synchrotron X-ray and neutron residual stress measurements at multiple length scales, and synchrotron ultra-small-angle X-ray scattering.  Correlations will also be made between microstructure and materials property measurements (hardness, tensile, fatigue, etc.)

see: www.nist.gov/ambench

Keywords:
Additive manufacturing; Metals; Materials characterization; SEM; TEM; XRD; SAXS; DSC; Residual stress

Eligibility

Citizenship:  Open to U.S. citizens
Level:  Open to Postdoctoral applicants
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