About this Abstract |
Meeting |
2024 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2024)
|
Symposium
|
2024 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2024)
|
Presentation Title |
Microstructure and Crack Propagation in IN718 Samples Fabricated by Laser Powder-Bed Fusion |
Author(s) |
Ishaan Sati, Bharath Bhushan Ravichander, Purna Sai Pavan Kalyan Nandigama, Golden Kumar |
On-Site Speaker (Planned) |
Bharath Bhushan Ravichander |
Abstract Scope |
This study explores the relationship between laser power levels and microstructures in Inconel 718 parts made via laser powder bed fusion, along with the impact of quasistatic loading on notched specimens. The other process parameters are kept constant to critically examine and isolate the impact of varying laser power. By varying laser power, it uncovers changes in melt pool geometry, density, porosity, and grain structure, affecting mechanical properties under load. An increase in laser power helps in eliminating defects, but a continued increase in its value could introduce defects which are detrimental. The formation of different grain structures due to a variation in the cooling rate plays an important role in the crack propagation that occurs in notched specimens under the application of a quasistatic load. The research emphasizes the importance of optimizing laser power while cautioning against uncontrolled increases due to potential adverse effects on part integrity and performance. |
Proceedings Inclusion? |
Definite: Post-meeting proceedings |