Scanning transmission electron microscope observations of defects in as-grown and pre-strained Mo alloy fibers

PS Phani, KE Johanns, G Duscher, A Gali, EP George… - Acta materialia, 2011 - Elsevier
Compression testing of micro-pillars has recently been of great interest to the small-scale
mechanics community. Previous compression tests on single crystal Mo alloy micro-pillars …

Effects of pre-strain on the compressive stress–strain response of Mo-alloy single-crystal micropillars

H Bei, S Shim, GM Pharr, EP George - Acta Materialia, 2008 - Elsevier
A NiAl–Mo eutectic was directionally solidified to produce composites with well-aligned
single-crystal Mo-alloy fibers embedded in a NiAl matrix. They were pre-strained by …

In-situ tensile testing of single-crystal molybdenum-alloy fibers with various dislocation densities in a scanning electron microscope

KE Johanns, A Sedlmayr, PS Phani… - Journal of Materials …, 2012 - cambridge.org
In-situ tensile tests have been performed in a dual beam focused ion beam and scanning
electron microscope on as-grown and prestrained single-crystal molybdenum-alloy (Mo …

Characterization of dislocation structures and deformation mechanisms in as-grown and deformed directionally solidified NiAl–Mo composites

J Kwon, ML Bowers, MC Brandes, V McCreary… - Acta Materialia, 2015 - Elsevier
Abstract Directionally solidified (DS) NiAl–Mo eutectic composites were strained to plastic
strain values ranging from 0% to 12% to investigate the origin of the previously observed …

Spatially resolved strain measurements in Mo-alloy micropillars by differential aperture x-ray microscopy

H Bei, RI Barabash, GE Ice, W Liu, J Tischler… - Applied Physics …, 2008 - pubs.aip.org
Spatially resolved strain distributions in the NiAl matrix and the∼ 550–1000 nm Mo fibers of
a NiAl–Mo eutectic were investigated by microbeam x-ray diffraction. Position sensitive d …

Slip in directionally solidified Mo-alloy micropillars–Part I: Nominally dislocation-free pillars

J Zimmermann, H Van Swygenhoven, C Marichal… - Acta materialia, 2012 - Elsevier
In situ Laue analysis during microcompression reveals plasticity in [001]-oriented,
directionally solidified Mo alloy pillars to start with slip on the {112}〈 111〉 system having …

3D x-ray microprobe investigation of local dislocation densities and elastic strain gradients in a NiAl-Mo composite and exposed Mo micropillars as a function of …

RI Barabash, H Bei, Y Gao, GE Ice… - Journal of Materials …, 2010 - cambridge.org
3D spatially-resolved polychromatic microdiffraction was used to nondestructively obtain
depth-dependent elastic strain gradients and dislocation densities in the constituent phases …

Work hardening in micropillar compression: In situ experiments and modeling

D Kiener, PJ Guruprasad, SM Keralavarma, G Dehm… - Acta Materialia, 2011 - Elsevier
Experimental measurements and simulation results for the evolution of plastic deformation
and hardening in micropillars are compared. The stress–strain response of high-symmetry …

Specimen size and shape dependent yield strength in micropillar compression deformation of Mo single crystals

J Zhang, K Kishida, H Inui - International Journal of Plasticity, 2017 - Elsevier
The deformation behavior of [1¯ 25]-oriented Mo micropillars with rectangular cross-sections
having the [111] primary slip direction parallel to one of the two orthogonal side-surfaces has …

A micropillar compression investigation into the plastic flow properties of additively manufactured alloys

SH Li, Y Zhao, J Radhakrishnan, U Ramamurty - Acta Materialia, 2022 - Elsevier
Solidification cells and a high density of dislocations are two common features of additively
manufactured (AM) alloys that are processed using techniques such as laser powder bed …