<p>During 2017-2020, the Electric Power Research Institute (EPRI) engaged several research organizations to study four applications of Nondestructive Evaluation (NDE) for Materials Characterization related to the nuclear and fossil power industry. One of those topics was the nondestructive microstructure characterization of temperate martensitic steels commonly used in fossil plants. A significant portion of failures in grade 91 and 92 steels have been attributed to poor fabrication and variability in the microstructure. EPRI manufactured and characterized a sample inventory to mimic eight different microstructure conditions based on different heat treatment processes. EPRI led a research study with three research organizations to assess NDE techniques to identify the different microstructure conditions in the test set to detect acceptable or unacceptable conditions. The following techniques were applied: magnetic methods, including coercive field, incremental permeability and magnetic Barkhausen noise; ultrasonic methods, including attenuation, absorption and backscatter measurements; and thermoelectric power (TEP). Building on the previous presentations that discussed in detail each of the applied techniques and the results they yield individually, this talk will provide an integrated assessment of the results and discuss to what level the different microstructure conditions studied can be discriminated when combining the information provided by the individual NDE techniques using different analysis methods.</p>

Nondestructive Microstructure Characterization of Temperate Martensitic Steels – Fusion of Nde Techniques

Paper Proceedings: https://asmedigitalcollection.asme.org/qnde/QNDE2021/volume/85529

ASME 2021 48th Annual Review of Progress in Quantitative Nondestructive Evaluation (QNDE2021)

Supporting the need among researchers worldwide for additional online and multimedia content, ASME now offers the ASME Conference Video Collection. This platform will collect and provide long-term access to conference presentation videos, encompassing all technology areas within ASME's technical conference and events program. About 30,000-40,000 engineers across all mechanical engineering and related disciplines participate in ASME conferences each year. This includes authors of approximately 6,000 to 8,000 technical papers published by ASME, the majority of whom also submit video presentations for our virtual conferences. The video collection will be available as an add-on to existing product packages or as a separate subscription.