Por favor, use este identificador para citar o enlazar a este item: http://hdl.handle.net/10261/122554
COMPARTIR / EXPORTAR:
logo share SHARE logo core CORE BASE
Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL | DATACITE

Invitar a revisión por pares abierta
Título

Drastic influence of minor Fe or Co additions on the glass forming ability, martensitic transformations and mechanical properties of shape memory Zr-Cu-Al bulk metallic glass composites

AutorGonzález, Sergio; Pérez Zubiaur, Pablo CSIC ORCID; Rossinyol, E.; Suriñach, Santiago; Dolors Baró, M.; Pellicer, E.; Sort, J.
Fecha de publicación2014
EditorElsevier
CitaciónScience and Technology of Advanced Materials 15: ) 035015 (2014)
ResumenThe microstructure and mechanical properties of Zr48Cu 48-x Al4Mx (M≡Fe or Co, x=0, 0.5, 1 at.%) metallic glass (MG) composites are highly dependent on the amount of Fe or Co added as microalloying elements in the parent Zr48Cu 48Al4 material. Addition of Fe and Co promotes the transformation from austenite to martensite during the course of nanoindentation or compression experiments, resulting in an enhancement of plasticity. However, the presence of Fe or Co also reduces the glass forming ability, ultimately causing a worsening of the mechanical properties. Owing to the interplay between these two effects, the compressive plasticity for alloys with x=0.5 (5.5% in Zr48Cu47.5Al4Co0.5 and 6.2% in Zr48Cu47.5Al4Fe0.5) is considerably larger than for Zr48Cu48Al4 or the alloys with x=1. Slight variations in the Young's modulus (around 5-10%) and significant changes in the yield stress (up to 25%) are also observed depending on the composition. The different microstructural factors that have an influence on the mechanical behavior of these composites are investigated in detail: (i) co-existence of amorphous and crystalline phases in the as-cast state, (ii) nature of the crystalline phases (austenite versus martensite content), and (iii) propensity for the austenite to undergo a mechanically-driven martensitic transformation during plastic deformation. Evidence for intragranular nanotwins likely generated in the course of the austenite-martensite transformation is provided by transmission electron microscopy. Our results reveal that fine-tuning of the composition of the Zr-Cu-Al-(Fe,Co) system is crucial in order to optimize the mechanical performance of these bulk MG composites, to make them suitable materials for structural applications. © 2014 National Institute for Materials Science.
Versión del editorhttp://dx.doi.org/10.1088/1468-6996/15/3/035015
URIhttp://hdl.handle.net/10261/122554
DOI10.1088/1468-6996/15/3/035015
Identificadoresdoi: 10.1088/1468-6996/15/3/035015
issn: 1468-6996
Aparece en las colecciones: (CENIM) Artículos




Ficheros en este ítem:
Fichero Descripción Tamaño Formato
Drastic Inluence.pdf2,52 MBAdobe PDFVista previa
Visualizar/Abrir
Mostrar el registro completo

CORE Recommender

SCOPUSTM   
Citations

14
checked on 21-mar-2024

WEB OF SCIENCETM
Citations

13
checked on 26-feb-2024

Page view(s)

307
checked on 28-mar-2024

Download(s)

225
checked on 28-mar-2024

Google ScholarTM

Check

Altmetric

Altmetric


NOTA: Los ítems de Digital.CSIC están protegidos por copyright, con todos los derechos reservados, a menos que se indique lo contrario.