Abstract
AbstractThe present paper investigates the uniaxial compression behavior of highly alloyed, focused ion beam (FIB) manufactured micropillars, ranging from 200 up to 4000 nm in diameter. The material used was the Ni‐based oxide‐dispersion strengthened (ODS) alloy Inconel MA6000. Stress–strain curves show a change in slip behavior comparable to those observed in pure fcc metals. Contrary to pure Ni pillar experiments, high critical resolved shear stress (CRSS) values were found independent of pillar diameter. This suggests that the deformation behavior is primarily controlled by the internal obstacle spacing, overwhelming any pillar‐size‐dependent mechanisms such as dislocation source action or starvation.
Highlights
HAL is a multi-disciplinary open access archive for the deposit and dissemination of scientific research documents, whether they are published or not
The present paper investigates the uniaxial compression behavior of highly alloyed, focused ion beam (FIB) manufactured micropillars, ranging from 200 up to 4000 nm in diameter
Tests revealed that single-crystal metals exhibit strong size effects in plastic deformation, suggesting that the mechanical strength of the metal is related to the smallest dimension of the tested sample
Summary
To cite this version: Baptiste Girault, Andreas Schneider, Carl Frick, Eduard Arzt. Strength effects in micropillars of a dispersion strengthened superalloy. Advanced Engineering Materials, Wiley-VCH Verlag, 2010, 12 (5), pp.385388. HAL is a multi-disciplinary open access archive for the deposit and dissemination of scientific research documents, whether they are published or not. The documents may come from teaching and research institutions in France or abroad, or from public or private research centers. L’archive ouverte pluridisciplinaire HAL, est destinée au dépôt et à la diffusion de documents scientifiques de niveau recherche, publiés ou non, émanant des établissements d’enseignement et de recherche français ou étrangers, des laboratoires publics ou privés
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