|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Additive Manufacturing of Metals: Fatigue and Fracture
||Study on Dominant factors on Fatigue Strength of Additive Manufactured Ti-6Al-4V Alloy
||Junichi Ozaki, Takehisa Yamada, Masahiro Takanashi, Ryoji Kakiuchi, Akihiro Sato
|On-Site Speaker (Planned)
In this study, effects of porosities in additive manufactured Ti-6Al-4V alloy on fatigue strength are investigated from fatigue tests and observations of fracture surface. The fatigue lives of Non-HIP’d materials are shorter than those of HIP’d materials. All Non-HIP’d materials are fractured from porosities near the surface. All stress intensity factors for porosities to be fracture origin are larger than their threshold stress intensity factor. That means Non-HIP’d material has very short crack initiation life. Therefore, fatigue life of Non-HIP’d material is shorter than those of HIP’d. The estimated fatigue lives based on fatigue crack growth analysis agreed with experimental data for not only finite life region but also fatigue limit.
||Planned: Supplemental Proceedings volume