Ultrasonic Nondestructive Evaluation (NDE)
Microstructure Determination
- Statistical inversion methods based on analytical models of ultrasonic systems and material systems for microstructural grain size determination
NDE Related to Additive Manufacturing
- Novel methods including acoustic monitoring for process and damage state determination
- Knowledge of methods applied to AM components and their limitations
Flaw Detection and Characterization
- Direct image-based analysis and flaw inversion techniques for metals
- Experience with diffusion bonded metals, microtextured regions (MTRs), porosity, and inclusions
- Additional experience with Ground Penetrating Radar (GPR) and Thermography
Lucas W. Koester
Associate Scientist
lkoester@iastate.edu
Funded Research Sponsors
- Industry/University Cooperative Research Center (CNDE), Honeywell, IHI, & others
Keywords
- Ultrasound, Additive Manufacturing, Microstructure Characterization, Flaw Scattering
Activities and Key References
- Co-Chair, Session on Additive Manufacturing, QNDE 2017-2019
- “NDE for Additive Manufacturing”, Short Course Organizer, QNDE 2018
- Koester, Lucas W., et al. “Nondestructive testing for metal parts fabricated using powder-based additive manufacturing.” Materials Evaluation76.4 (2018): 514-524.
- Taheri, Hossein, et al. “Powder based additive manufacturing-A review of types of defects, generation mechanisms, detection, property evaluation and metrology.” Int. J. Addit. Subtractive Mater. Manuf 1.2 (2017): 172-209.