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On the preparation and mechanical testing of nano to micron-scale specimens

Borasi, Luciano; Slagter, Alejandra; Mortensen, Andreas; Kirchlechner, Christoph 1
1 Institut für Angewandte Materialien – Werkstoff- und Grenzflächenmechanik (IAM-MMI), Karlsruher Institut für Technologie (KIT)

Abstract:

Over the past two decades, means allowing to probe experimentally the mechanical behavior of materials specimens only a few micrometers or less in diameter have multiplied, largely owing to the widespread adoption and versatility of focused ion beam (FIB) milling for the preparation of small-scale test specimens. Despite its remarkable capabilities, the ion bombardment that is employed during FIB milling operations does not leave machined surfaces unscathed: it may induce a series of alterations in the near-surface microstructure of materials, which vary in severity depending on the material being milled, or milling parameters, or the type of ion used. These alterations in turn can strongly influence the local behavior, and as a result measured mechanical properties, of the milled material. In the first part of this manuscript, we review the different forms that FIB-induced microstructural alterations can take and their influence on small-scale mechanical test results. In the second part, we present alternative strategies that have been used to circumvent the issue. These include the use of entirely different small-scale sample fabrication processes, as well as approaches that do use FIB-milling but put effort in the test design to minimize or avoid the formation of FIB-induced defects in regions where micromechanical test data are collected. ... mehr


Verlagsausgabe §
DOI: 10.5445/IR/1000175048
Veröffentlicht am 11.10.2024
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Angewandte Materialien – Werkstoff- und Grenzflächenmechanik (IAM-MMI)
Publikationstyp Zeitschriftenaufsatz
Publikationsmonat/-jahr 09.2024
Sprache Englisch
Identifikator ISSN: 1359-6454, 1873-2453
KITopen-ID: 1000175048
Erschienen in Acta Materialia
Verlag Elsevier
Seiten 120394
Schlagwörter Ion beam processing, Ion irradiation, Micron scale, Mechanical properties, Size effect
Nachgewiesen in Dimensions
Scopus
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