|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Advanced Thermo-mechanical Characterization of Materials with Special Emphasis on In Situ Techniques
||In-SEM Microscale Mechanical Testing of Thin Film Plastic Flow and Interfacial Integrity
||Yang Mu, Xiaoman Zhang, Wen Jin Meng
|On-Site Speaker (Planned)
Quantitative measurements of plastic flow in thin films under simple and well defined deformation geometries are important for calibration and validation of microscale plasticity models. Quantitative measurements of critical stresses needed to affect interfacial mechanical failure in coating/substrate systems are likewise important for engineering durable coated mechanical components and manufacturing tools.
We present recent results on quantitative evaluation of thin film plastic flow and coating/substrate interfacial mechanical integrity. We utilize a new, in-SEM, micro-pillar axial compression testing protocol to achieve quantitative measurements of confined plastic flow in metal thin films and critical stresses for affecting shear failures of coating/substrate interfaces. Dependence of flow stress on film thickness and microstructure, and dependence of interfacial shear failure stress on the choice of interfacial adhesion layers between ceramic coatings and substrates will be reported. Relevance of the results and testing protocol to microscale plasticity models and surface engineering practices will be discussed.
||Planned: Supplemental Proceedings volume