| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing Materials in Energy Environments
|
| Presentation Title |
Effects of Friction and Deformation Heating on Additively Manufactured M789 Steel during Hot Compression Tests |
| Author(s) |
Kudakwashe Nyamuchiwa, Clodualdo Aranas, Ali Keshavarzkermani |
| On-Site Speaker (Planned) |
Kudakwashe Nyamuchiwa |
| Abstract Scope |
Predicting accurate high-temperature mechanical properties of materials is crucial, specifically for metal additively manufactured alloys, wherein the industry standards are still being developed. For example, friction and non-isothermal conditions during high-temperature compression testing often lead to erroneous predictions of material properties. In this work, hot compression deformation was carried out on M789 steel samples fabricated through laser-powder bed fusion, utilizing a Gleeble thermomechanical simulator at a temperature range of 850-1050 °C and strain rate range of 0.01-1/s. The effects of friction and temperature were accounted for by incorporating test specimen barrelling and changes in the internal energy. It was observed that at a testing temperature of 900 °C and a strain rate of 1s-1, the effects of temperature and friction on the flow stress deviated by about 3.5% from experimental data. Since the determination of accurate flow stress curves in emerging fields, such as metal additive manufacturing, is crucial for advancing the development of more reliable constitutive models, friction and temperature correction must be performed when performing hot compression tests. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Characterization, Shaping and Forming |