About this Abstract |
Meeting |
2020 TMS Annual Meeting & Exhibition
|
Symposium
|
2020 Technical Division Student Poster Contest
|
Presentation Title |
SPG-49: Thermal Stability of Yttrium Oxide Nanoparticles in 304 ODS Alloy Additively Manufactured via Selective Laser Melting |
Author(s) |
Milad Ghayoor, Kijoon Lee, Yujuan He, Chih-Hung Chang, Brian K. Paul, Somayeh Pasebani |
On-Site Speaker (Planned) |
Milad Ghayoor |
Abstract Scope |
Thermal stability of added yttrium oxide (Y2O3) to a 304L austenitic stainless steel matrix manufactured via selective laser melting (SLM) is investigated. Sandvik 304L SS powder and 0.5 wt.% of yttria nanoparticles were used as feedstocks in an OR Creator SLM machine. The laser power of 140W and scanning speed of 300 mm/s was used in a nitrogen atmosphere. The density of 99% and hardness of 350 HV were achieved in 304L ODS alloy. Scanning electron microscopy and energy dispersive X-ray spectroscopy revealed a homogenous distribution of Y-Si-O nanoparticles in the SLM 304L ODS alloy. At 800 °C, the yield stress of 151 MPa and ultimate tensile strength of 153 MPa were obtained; substantially higher than SLM 304L. Printed samples were kept at 1200°C for 100 hours in argon atmosphere. Microstructure and mechanical properties of 304L and 304L ODS are compared before and after thermal stability experiment. |
Proceedings Inclusion? |
Undecided |