About this Abstract |
Meeting |
MS&T21: Materials Science & Technology
|
Symposium
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Additive Manufacturing of Metals: Microstructure, Properties and Alloy Development
|
Presentation Title |
Deformation Mechanisms in 316L Stainless Steel Fabricated by Additive and Additive + Subtractive (Hybrid) Manufacturing |
Author(s) |
Rangasayee Kannan, Peeyush Nandwana, Thomas Feldhausen |
On-Site Speaker (Planned) |
Rangasayee Kannan |
Abstract Scope |
In this presentation, the underlying deformation mechanisms in 316L stainless steel fabricated by additive and hybrid (additive+subtractive) manufacturing have been compared using microstructure characterization and strain hardening analysis. It was found that twinning was the dominant deformation mechanism in 316LSS produced by both additive and hybrid approaches. However, the hybrid samples have a relatively lower fraction of twins in the as-fabricated state compared to samples fabricated by a fully additive approach. The variation in twin fraction in the as-fabricated state resulted in delaying the onset of steady-state strain hardening rate to higher strain levels, thereby resulting in an overall increase in elongation to failure for the hybrid sample. The results go to show that that hybrid manufacturing has the potential to fabricate 316LSS parts with superior strength than the wrought materials and with a ductility higher than additive manufacturing and comparable to wrought materials. |