About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
|
Advances in Surface Engineering V
|
Presentation Title |
On Characterization of Microstructure and Surface Attributes in Drilling Processes at High Spatial Resolution |
Author(s) |
Abhishek Somani, James Mann, Srinivasan Chandrasekar, Kevin Trumble |
On-Site Speaker (Planned) |
Abhishek Somani |
Abstract Scope |
Mechanical drilling removes material by large-strain deformation, with various changes resulting to the mechanical state of the surface at the micrometer-scale. Characterizing the surface state at length scales on the order of ~ 10 μm is therefore critical for understanding hole surface integrity. We present results from an experimental study of surface quality attributes in mechanical hole drilling of two commercially important hard alloys – hardened AISI 4140 Steel (~45 HRc ) and ATI-720 superalloy. The surface topography, hardness and microstructure – are characterized using a taper-sectioning technique to access the very near hole-surface region. The surface deformation characteristics are explored at high spatial resolution using optical metallography, nano- and micro- indentation, and optical profilometry. We demonstrate the capability of the taper-sectioning approach, and its use for discriminating both process parameter attributes and different mechanical hole-making processes. Industrial applications and implications for studying performance attributes of drilled holes are discussed. |
Proceedings Inclusion? |
Planned: |
Keywords |
Surface Modification and Coatings, Characterization, |