| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing: Length-Scale Phenomena in Mechanical Response
|
| Presentation Title |
Effect of Grain Microstructure on the Deformation Behaviour of Inconel 718 Fabricated by Laser Powder-bed Fusion: An In-situ Study |
| Author(s) |
Jalal Al-Lami, Thibaut Dessolier, Talha Pirzada, Minh-Son Pham |
| On-Site Speaker (Planned) |
Minh-Son Pham |
| Abstract Scope |
Additive manufacturing is widely regarded as a disruptive technology because of its unique capacity to create builds of structurally complex geometries on a macroscopic-scale and tailored metallurgical microstructures on a fine-scale. This talk examines the effects of altered microstructures of Inconel 718 created by laser powder-bed fusion using varied scanning strategies on the deformation behaviour. The examination was performed using in-situ tensile testing coupled with electron backscatter diffraction, scanning electron microscopy and optical microscopy. The deformation behaviour was correlated with the grain size, dislocation density and crystallographic orientations. Special attention was paid to study the heterogeneous slip activities. It was found that the heterogeneity was enhanced in regions of clustered fine, but “soft” <001> grains and in the vicinity of the boundaries between soft <001> and hard <111> grains with respect to the loading direction. The evolution of the crystallographic texture with increasing strain intervals was quantified and discussed. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Characterization, Mechanical Properties |