| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
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Additive Manufacturing: Length-Scale Phenomena in Mechanical Response
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| Presentation Title |
Tailored Microstructure and Creep Behavior of Laser Powder Bed Fusion Inconel 939 |
| Author(s) |
Nandha Kumar Eswaramoorthy, Sarath Chandra Reddy Karumudi, Dheepa Srinivasan, Vishwanath Chintapentha, Vikram Jayaram, Praveen Kumar |
| On-Site Speaker (Planned) |
Nandha Kumar Eswaramoorthy |
| Abstract Scope |
Laser Powder Bed Fusion (LPBF) Inconel 939 (IN939) was subjected to different short cycle heat treatments. The as-printed structure was subjected to direct aging at 800° C (DA1), at 1000°C (DA2), and 1000°C + 800°C (DA3) and was compared with solutionizing at 1190°C and aging at 1000°C+800°C (SA), to generate different microstructures with variable gamma prime γ’ precipitate sizes and volume fractions. DA1 showed partial retention of the characteristic as-printed dendritic structure along with precipitation of nano-sized tertiary gamma prime (γ’) precipitate while the other three HT’s showed the occurrence of equiaxed grains and precipitation of intra-granular η-phase (Ni<sub>3</sub>Ti) along with primary and secondary γ’ precipitates. DA1 showed the highest tensile strength and thermal stability. The effectiveness of the γ’ particle size distribution to the stability the high temperature creep behaviour, was evaluated, via uniaxial creep measurements. Crystal plasticity modeling was carried out to predict the stable creep response. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Characterization, Mechanical Properties |