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

Barriobero Vila, Pere and Vallejos, Juan Manuel and Gussone, Joachim and Haubrich, Jan and Kelm, Klemens and Stark, Andreas and Schell, Norbert and Requena, Guillermo (2021) Interface-Mediated Twinning-Induced Plasticity in a Fine Hexagonal Microstructure Generated by Additive Manufacturing. Advanced Materials. Wiley. doi: 10.1002/adma.202105096. ISSN 0935-9648.

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Official URL: https://doi.org/10.1002/adma.202105096

Abstract

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

Item URL in elib:https://elib.dlr.de/145898/
Document Type:Article
Title:Interface-Mediated Twinning-Induced Plasticity in a Fine Hexagonal Microstructure Generated by Additive Manufacturing
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Barriobero Vila, PereUNSPECIFIEDhttps://orcid.org/0000-0002-4412-3729UNSPECIFIED
Vallejos, Juan ManuelNortheast National UniversityUNSPECIFIEDUNSPECIFIED
Gussone, JoachimUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Haubrich, JanUNSPECIFIEDhttps://orcid.org/0000-0002-5748-2755UNSPECIFIED
Kelm, KlemensUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Stark, AndreasUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Schell, NorbertUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Requena, GuillermoUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Date:11 October 2021
Journal or Publication Title:Advanced Materials
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
DOI:10.1002/adma.202105096
Publisher:Wiley
ISSN:0935-9648
Status:Published
Keywords:deformation twinning, hexagonal close-packed alloys, in situ high-energy synchrotron X-ray diffraction, metal 3D printing, structural properties
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:Clean Propulsion
DLR - Research area:Aeronautics
DLR - Program:L CP - Clean Propulsion
DLR - Research theme (Project):L - Advanced Materials and New Manufacturing Technologies
Location: Köln-Porz
Institutes and Institutions:Institute of Materials Research
Institute of Materials Research > Metallic Structures and Hybrid Material Systems
Deposited By: Barriobero Vila, Pere
Deposited On:30 Nov 2021 09:48
Last Modified:30 Nov 2021 09:48

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