About this Abstract |
Meeting |
2020 TMS Annual Meeting & Exhibition
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Symposium
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Additive Manufacturing: Advanced Characterization with Synchrotron, Neutron, and In Situ Laboratory-scale Techniques
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Presentation Title |
Investigating the Mechanics of Additively Manufactured Materials Using Neutron Diffraction |
Author(s) |
Allison M. Beese, Zhuqing Wang, Alexandru Stoica, Dong Ma |
On-Site Speaker (Planned) |
Allison M. Beese |
Abstract Scope |
Additive manufacturing (AM) of metals imparts complex thermal histories to the material being deposited, resulting in the buildup of residual stresses and the formation of complex microstructures. We will discuss our efforts utilizing mechanical testing with in situ neutron diffraction to interrogate temperature-dependent properties of additively manufactured Inconel 625 (AM-IN625). We investigated grain-level deformation behavior under compression at room and elevated temperatures and showed that dynamic strain aging was absent in AM-IN625 under the same conditions for which it was active in conventionally processed IN625 (CP-IN625), having implications for the performance of AM-IN625 in service. Additionally, AM-IN625 had a faster stress relaxation response than CP-IN625, having implications for the development of residual stresses during AM processing. The differences in temperature-dependent mechanical behavior in AM-IN625 versus CP-IN625 were found to be due to differences in microstructural features and have implications for tailoring microstructures via AM for desired properties. |
Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |