About this Abstract |
| Meeting |
MS&T24: Materials Science & Technology
|
| Symposium
|
Additive Manufacturing: Design, Materials, Manufacturing, Challenges and Applications
|
| Presentation Title |
A Mechanical Test Artifact for Determining Relative As-Built Fracture Toughness in Laser Powder Bed Fusion |
| Author(s) |
Dinh Son Nguyen, Soumya Sridar, Wei Xiong, Albert To |
| On-Site Speaker (Planned) |
Dinh Son Nguyen |
| Abstract Scope |
This work proposes a mechanical test artifact that provides a quick assessment of the relative as-built fracture toughness of PBF-processed materials. The proposed artifact consists of a cantilever beam attached to a rectangular bar to form a sharp interface. Due to an increasing amount of residual stress with build height, the interface will eventually crack at the interface on the free end of the cantilever beam. Since fracture toughness is highly sensitive to defects, the extent of cracking provides an indication of the relative fracture toughness among different processing conditions. To demonstrate its capability, the proposed test artifact is utilized to optimize the process parameters for Inconel 718 using a process mapping approach. The process map obtained reveals that the measured crack length on the printed artifact has a higher sensitivity than the measured density with varying process parameters, allowing the optimal parameters to be identified easily. |