About this Abstract |
Meeting |
2023 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2023)
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Symposium
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2023 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2023)
|
Presentation Title |
Microstructure and Mechanical Properties of Additively Manufactured Haynes 282: A Comparative Analysis between L-PBF and LP-DED Technologies |
Author(s) |
Nabeel Ahmad, Reza Ghiaasiaan, Paul R. Gradl, Shuai Shao, Nima Shamsaei |
On-Site Speaker (Planned) |
Nabeel Ahmad |
Abstract Scope |
This study compares the microstructure and tensile properties of Haynes 282 fabricated using laser powder bed fusion and laser powder directed energy deposition. Both sets underwent stress-relieving, followed by hot isostatic pressing, and the standard double aging heat treatment. Tensile testing was conducted at room temperature on specimens fabricated with both technologies to evaluate and compare their tensile behaviors. Results show that the ultimate tensile and yield strengths of laser powder bed fused specimens were 18% and 57% higher, respectively than those of laser powder directed energy deposited ones, whereas the elongation to failure was similar in both. The difference in strengths is attributed to the differences in the size of γ' precipitates and grains, i.e., those in the LP-DED specimens being larger, whereas similar elongation to failure is attributed to the carbide debonding dominating the fracture mechanism in both batches. |
Proceedings Inclusion? |
Definite: Post-meeting proceedings |