Postdoc - Mechanical Behavior of Advanced Structural Alloys Engineering Diffraction

Overview

We are seeking a Postdoctoral Research Associate to conduct Mechanical Behavior of Advanced Structural Alloys by Engineering Diffraction.

This position resides in the Materials Engineering Group within the Large Scale Structure Section, Neutron Scattering Division, Neutron Sciences Directorate at Oak Ridge National Laboratory (ORNL) . The selected candidate will work in a highly collaborative environment including teams in Neutron Sciences Directorate and Physical Sciences Director a te , leveraging state-of-the‑art neutron characterization and other characterization tools to develop a mechanistic understanding of deformation, strengthening, and failure in advanced alloys.

The research will focus on integrating microstructure characterization, in situ diffraction techniques, and mechanical testing to uncover processing–microstructure–property relationships. The candidate will have opportunities to interact with multidisciplinary teams and contribute to high‑impact publications and collaborative projects.

• Conduct research on deformation mechanisms and mechanical behavior of advanced structural alloys.
• Conduct in situ neutron diffraction experiments to study micromechanical behavior under loading conditions (e.g., tension, compression, creep).
• Perform detailed microstructural characterization using SEM, EBSD, TEM, XRD, and related techniques.
• Analyze lattice strain evolution, phase stress, and defect evolution using advanced data analysis tools.
• Perform alloy fabrication and processing (e.g., arc melting, heat treatment) and relate processing to performance.
• Apply analytical and modeling approaches to interpret experimental results.
• Collaborate with internal and external research teams to define and advance research directions.
• Present research findings and publish results in peer‑reviewed journals.
• Deliver ORNL’s mission by aligning behaviors, priorities, and interactions with our core values of Impact, Integrity, Teamwork, Safety, and Service. Promote equal opportunity by fostering a respectful workplace – in how we treat one another, work together, and measure success.

• A PhD in materials science & engineering, physics, chemistry, or a related field completed within the last 5 years.
• Experience utilizing computational thermodynamic (CALPHAD) software, such as Thermo-Calc, DICTRA, PANDAT, or Fact Sage.
• Proficiency in materials data analytics,including correlation analysis and machine learning techniques.

• Experience with microstructure characterization techniques (SEM, EBSD, TEM, XRD).
• Experience in mechanical testing (tension, compression, fatigue, creep, nanoindentation) and in situ neutron or synchrotron diffraction techniques.
• Background in advanced structural alloys, including high‑entropy alloys or precipitation‑strengthened systems.
• Familiarity with diffraction and data analysis tools (e.g., GSAS, GSAS-II, VDRIVE).
• Experience in alloy fabrication and processing (e.g., arc melting, thermomechanical processing, additive manufacturing).
• Knowledge of deformation mechanisms such as dislocation slip, twinning, and precipitation strengthening.

Applicants cannot have received their Ph.D. more than five years prior to the date of application and must complete all degree requirements before starting their appointment. The appointment length will be up to 24 months with the potential for extension. Initial appointments and extensions are subject to performance and availability of funding.

• This position requires the ability to obtain and maintain an HSPD-12 PIV badge. For employment at Oak Ridge National Laboratory (ORNL), a Real  form of identification will be required. Additionally, ORNL is subject to Department of Energy (DOE) access restrictions. All employees must also be able to obtain and maintain a federal Personal Identity Verification (PIV) card as mandated by Homeland Security Presidential Directive 12 (HSPD-12) and Department of Energy (DOE) Order 473.1A, which requires a favorable post‑employment background investigation.
• To obtain this credential, new…