Interface-Mediated Twinning-Induced Plasticity in a Fine Hexagonal Microstructure Generated by Additive Manufacturing

Interface-Mediated Twinning-Induced Plasticity in a Fine Hexagonal Microstructure Generated by Additive Manufacturing

© 2021 Deutsches Zentrum fur Luft- und Raumfahrt. Advanced Materials published by Wiley-VCH GmbH.

Bibliographische Detailangaben
Veröffentlicht in:Advanced materials (Deerfield Beach, Fla.). - 1998. - 33(2021), 52 vom: 30. Dez., Seite e2105096
1. Verfasser: Barriobero-Vila, Pere (VerfasserIn)
Weitere Verfasser: Vallejos, Juan Manuel, Gussone, Joachim, Haubrich, Jan, Kelm, Klemens, Stark, Andreas, Schell, Norbert, Requena, Guillermo
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2021
Zugriff auf das übergeordnete Werk:Advanced materials (Deerfield Beach, Fla.)
Schlagworte:Journal Article deformation twinning hexagonal close-packed alloys in situ high-energy synchrotron X-ray diffraction metal 3D printing structural properties
Beschreibung
Zusammenfassung:© 2021 Deutsches Zentrum fur Luft- und Raumfahrt. Advanced Materials published by Wiley-VCH GmbH.
The grain size is a determinant microstructural feature to enable the activation of deformation twinning in hexagonal close-packed (hcp) metals. Although deformation twinning is one of the most effective mechanisms for improving the strength-ductility trade-off of structural alloys, its activation is reduced with decreasing grain size. This work reports the discovery of the activation of deformation twinning in a fine-grained hcp microstructure by introducing ductile body-centered cubic (bcc) nano-layer interfaces. The fast solidification and cooling conditions of laser-based additive manufacturing are exploited to obtain a fine microstructure that, coupled with an intensified intrinsic heat treatment, permits to generate the bcc nano-layers. In situ high-energy synchrotron X-ray diffraction allows tracking the activation and evolution of mechanical twinning in real-time. The findings obtained show the potential of ductile nano-layering for the novel design of hcp damage tolerant materials with improved life spans
Beschreibung:Date Revised 13.10.2024
published: Print-Electronic
Citation Status PubMed-not-MEDLINE
ISSN:1521-4095
DOI:10.1002/adma.202105096