About this Abstract |
Meeting |
2025 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2025)
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Symposium
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2025 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2025)
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Presentation Title |
Effect of Part Geometry on the Temperature-Dependent Tensile Behavior of LP-DED A6061-RAM2 Aluminum Alloy |
Author(s) |
Md Faysal Khan, Paul R. Gradl, Shuai Shao, Nima Shamsaei |
On-Site Speaker (Planned) |
Md Faysal Khan |
Abstract Scope |
This study investigated the effect of part geometry on the temperature-dependent tensile behavior of A6061-RAM2 aluminum alloy fabricated via laser powder direct energy deposition (LP-DED), using flat and round specimens. Tensile tests were conducted from cryogenic (-195 °C) to elevated temperatures (up to 400 °C) to evaluate the tensile behavior of each geometry. Under machined surface conditions, round specimens exhibited slightly higher yield strength and comparable ultimate tensile strength, along with a noticeably greater elongation to failure than their flat counterparts. These differences were primarily attributed to geometric effects, including more uniform stress distribution and reduced strain localization in round specimens. However, for both geometries, tensile strengths gradually decreased from -195 to 200 °C, primarily due to increased dislocation mobility, followed by a sharp strength drop above 200 °C, attributed to excessive grain boundary sliding. |
Proceedings Inclusion? |
Planned: Post-meeting proceedings |