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Opportunity at National Institute of Standards and Technology (NIST)

Effects of Laser Materials Processing on Structural Performance

Location

Material Measurement Laboratory, Applied Chemicals and Materials Division

RO# Location
50.64.72.B7946 Boulder, CO

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

Advisers

Name E-mail Phone
Fekete, James R james.fekete@nist.gov 303.497.5204

Description

NIST is undertaking an ambitious study of complex laser-matter interactions to develop a fundamental understanding of the multiscale material modifications during laser materials processing. Applications of interest include invisible and dissimilar welding and laser-based additive manufacturing processes. This program unites NIST expertise in materials characterization and laser metrology to demonstrate novel approaches to laser welding and in situ monitoring. Drawing on NIST resources as well as the manufacturing expertise of key industrial collaborators, we have constructed a laser welding test bed to investigate novel approaches for welding difficult and dissimilar alloys, and for performing fundamental studies during additive manufacturing. The NIST laser welding test bed will enable important research on the evolution and structural properties of the weld micro- and macro-structure as a function of laser parameters. The opportunity includes development of novel in situ process monitoring methodologies as well as sophisticated post-process mechanical and material characterization. State-of-the-art facilities include dual-beam FIB, TEM, atom probe, helium-ion microscopy, and mechanical testing facilities with environmental and temperature control. Emphasis is placed on developing novel structure-property-processing models and associated measurement techniques for advanced manufacturing applications utilizing lasers.

 

Keywords:
Laser welding; Mechanical properties; Fatigue and fracture; Computational materials modeling; Structural materials; Metallography; Finite element analysis; Microstructure; Weldability; 3D printing; Additive manufacturing;

Eligibility

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