Multiscale Indentation Mechanics for Advanced and Heterogenous Metallurgical Materials Processing-Structure-Properties-Performance Relations

Sousa, Bryer

Etd

Multiscale Indentation Mechanics for Advanced and Heterogenous Metallurgical Materials Processing-Structure-Properties-Performance Relations

Public

The development of novel metallurgical materials systems and understanding the linkages between such materials (in terms of the properties, structures, processing history, and resultant performance) with advanced materials processing methods is of particular importance to national security and modern technological innovation. With the need for rapid and high-fidelity experimental modalities in mind, it is proposed that costly, time-inefficient, and traditional approaches to experimentally assessing mechanics of materials-based processing-structure-properties-performance (PSPP) relations can now be augmented via multi-scale indentation-driven mechanical characterization. Accordingly, profilometry-based indentation plastometry, instrumented indentation testing, microparticle compression testing, nanomechanical mapping, and dynamic, quasi-static, and conventional nanoindentation testing serve as the respective multi-scale indentation-based mechanical characterization techniques applied herein. The present thesis synthesizes how understanding said PSPP relations that underly advanced metallurgical materials and processing was researched, developed, and applied to demonstrate further the role of multi-scale indentation-driven insights guiding materials and manufacturing engineering decisions in the 21st century. The central material systems considered herein include Al, Cu, Ta, steels, Ni, and Ti. The advanced metallurgical materials processing technologies include cold gas-dynamic spray, wire arc additive manufacturing, austempering, plasma arc additive manufacturing, casting methods, wrought processes, and rapid solidification through atomization.

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