|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Mechanical Behavior at the Nanoscale IV
||In-situ Brittle Fracture with Microscopic DIC
||Charles Spellman, Alex Arzoumanidis
|On-Site Speaker (Planned)
Improving machine tool wear in hardened steels and composites is crucial to reducing costs for manufacturing. Materials with extreme hardness or near-vertical da/dN curves are challenging to characterize due to the low displacements measured and the requirement of a fatigue rated load frame. Further, the test procedure for running the tests is labor intensive as it requires constantly monitoring compliance or visually inspecting the crack propagation. Performing these tests under high-magnification microscopy with a dynamic-rated load frame has until now been difficult due to limitations in actuator technology. The authors present a technique building upon Psylotech’s ÁTS platform, which allows for low out of plane motion ideal for high magnification 2D optical DIC. With a fast actuator capable of up to 140mm/s and accelerations up to 10m/s^2, the ÁTS is also uniquely capable on small length scales to perform high speed sinusoidal testing. High resolution force and displacement measurements complement DIC to provide a complete dataset for fracture analysis. An example case analyzes the fracture properties of a readily available hardened tool material. Additional use-cases taking advantage of the system are described.
||Planned: Supplemental Proceedings volume