|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Advanced Thermo-mechanical Characterization of Materials with Special Emphasis on In Situ Techniques
||In Situ 4D Tomographic Examination of Semi-solid Indentation Behaviour in Ni and Co Based Alloys
||Mohammed Abdul Azeem, Chedtha Puncreobutr, Robert C Atwood, Rahman Khandaker, David Dye, Peter D Lee
|On-Site Speaker (Planned)
||Mohammed Abdul Azeem
Investigating the semi-solid deformation behavior in metallic systems is critical for understanding defect formation and identifying temperature-pressure windows for tailoring the microstructure. In indentation of Al based alloys in semi-solid state, granular flow and liquation assisted cracking are the primary mechanisms that dictate the microstructure evoluton. However, it remains unknown if similar mechanisms operated in semi-solid state in Ni and Co based alloys.
Here we use a bespoke tomography rig equipped with a high temperature environmental cell and exclusively designed high x-ray contrast Ni and Co based alloys with ~300 μm globular gains to investigate the response of microstructure to indentation in semi-solid state. The α-Ni and α-Co grains were found to be remarkably soft with indenter slicing through almost all the grains in its path. In some instances the inverter was found to cut through free-floating grains. The associated morphological aspects and possible deformation mechanisms will be discussed.
||Planned: Supplemental Proceedings volume