In situ Observation of Ternary Eutectic Growth in a Directionally Solidified Mo–Si–B Alloy Using High‐Energy Synchrotron X‐Rays

Hasemann, Georg; Zhu, Linye; Hauschildt, Katja; Blankenburg, Malte; Ida, Shuntaro; Pyczak, Florian; Yoshimi, Kyosuke; Krüger, Manja

doi:10.1002/adem.202100111

Cited by 2 publications

(1 citation statement)

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“…The procedure used in the present study leads to a DSed microstructure which is comparable to the as-cast one, however, elongated, and oriented along the growth direction. For a comparison we refer to studies performed on ternary eutectic Mo-Si-B alloys processed by either using powder-mixed green samples [42,43] or pre-alloyed casted rods [44,45] during directional solidification.…”

Section: Results Of Dft Calculationsmentioning

confidence: 99%

Microstructure Formation of Cast and Directionally Solidified Mo-Ti-B Alloys

Petrusha

Hasemann

Touzani

et al. 2022

Metals

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In the present work the solidification of various Mo-Ti-B alloys was studied. The alloy compositions were chosen in the direct vicinity of a U-type invariant reaction in relation to the published Mo-rich corner of the Mo-Ti-B liquidus projection. The aim of this study was to understand the solidification path of as-cast Mo-Ti-B alloys and to derive specific knowledge on their peritectic microstructure evolution. In addition to experiments in an arc-melter, zone melting was used to allow slow cooling of a selected alloy composition. Using the achieved experimental data of the alloys investigated, DFT-calculations were carried out to study the influence of Ti on phase formation and stability, their lattice parameters, and mechanical properties.

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Section: Results Of Dft Calculationsmentioning

confidence: 99%

Microstructure Formation of Cast and Directionally Solidified Mo-Ti-B Alloys

Petrusha

Hasemann

Touzani

et al. 2022

Metals

Self Cite

View full text Add to dashboard Cite

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Orientation-dependent hardness of Mo3Si studied by cube-corner nanoindentation

Yang,

Hasemann,

Schwaiger

et al. 2023

J Mater Sci

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Mo$$_{3}$$ 3 Si crystals having crystallographic out-of-plane orientations close to $$(0\,0\,1)$$ ( 0 0 1 ) , $$(0\,1\,1)$$ ( 0 1 1 ) and $$(1\,2\,3)$$ ( 1 2 3 ) were studied by nanoindentation to better understand the hardness anisotropy. The Mo$$_{3}$$ 3 Si precipitates were grown in a Mo-17.5Si-6B alloy and identified by electron backscatter diffraction. Pronounced material pile-up around the indents was observed, which causes inaccuracies in the projected contact area determined using the Oliver–Pharr method of around 30% compared to the real one. Based on the analysis of scanning electron micrographs, the projected contact areas and thus the hardness values were determined. To rationalize the observed pronounced orientation dependence of the hardness of Mo$$_{3}$$ 3 Si, we suggest an easy-slip-cutting model accounting for the available slip systems as well as the upward flow of material along the surface of the cube-corner indenter tip.

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In situ Observation of Ternary Eutectic Growth in a Directionally Solidified Mo–Si–B Alloy Using High‐Energy Synchrotron X‐Rays

Abstract: The ORCID identification number(s) for the author(s) of this article can be found under https://doi.org/10.1002/adem.202100111.

Cited by 2 publications

References 33 publications

Microstructure Formation of Cast and Directionally Solidified Mo-Ti-B Alloys

Microstructure Formation of Cast and Directionally Solidified Mo-Ti-B Alloys

Orientation-dependent hardness of Mo3Si studied by cube-corner nanoindentation

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