| About this Abstract |
| Meeting |
2019 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing of Metals: Fatigue and Fracture III
|
| Presentation Title |
Fatigue Crack Initiation and Growth Behavior in Additively Manufactured 17-4 PH Stainless Steel |
| Author(s) |
Pooriya Dastranjy Nezhadfar, Shuai Shao, Steve Daniewicz, Nam Phan, Nima Shamsaei |
| On-Site Speaker (Planned) |
Pooriya Dastranjy Nezhadfar |
| Abstract Scope |
The effect of heat treatment on the crack initiation and crack growth behavior of 17-4 precipitation hardening (PH) stainless steel (SS) fabricated through laser powder bed fusion (L-PBF) process is investigated. Two types of specimens were employed in this study; dogbone round specimens with straight gage section based on ASTM E606 standard for the crack initiation study and compact tension (CT) specimens based on ASTM E647 standard for the crack growth study. In order to characterize the effects of surface roughness on crack initiation mechanism, some dogbone specimens were kept in their as-built surface condition, while others were machined and polished. CT specimens were designed with the notch parallel and perpendicular to the build direction to investigate the effect of layer orientation on the crack growth behavior of L-PBF 17-4 PH SS. Two different heat treatment conditions, CA-H900 and H1025, were applied. The experimental results and analysis will be presented. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |