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Texture and Differential Stress Development in W/Ni-Co Composite after Rotary Swaging
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SYSNO ASEP 0531359 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Texture and Differential Stress Development in W/Ni-Co Composite after Rotary Swaging Author(s) Strunz, Pavel (UJF-V) RID, ORCID, SAI
Kocich, R. (CZ)
Canelo-Yubero, David (UJF-V) ORCID, SAI
Macháčková, A. (CZ)
Beran, Přemysl (UJF-V) RID, ORCID, SAI
Krátká, L. (CZ)Number of authors 6 Article number 2869 Source Title Materials. - : MDPI
Roč. 13, č. 12 (2020)Number of pages 15 s. Publication form Print - P Language eng - English Country CH - Switzerland Keywords tugensten heavy alloys ; rotary swaging ; neutron diffraction ; resdual stress ; texture Subject RIV BM - Solid Matter Physics ; Magnetism OECD category Condensed matter physics (including formerly solid state physics, supercond.) R&D Projects GA19-15479S GA ČR - Czech Science Foundation (CSF) LM2015056 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Research Infrastructure Reactors LVR-15 and LR-0 II - 90120 - Centrum výzkumu Řež s.r.o. Method of publishing Open access Institutional support UJF-V - RVO:61389005 UT WOS 000550195100001 EID SCOPUS 85087444735 DOI 10.3390/ma13122869 Annotation Knowledge of texture and residual stresses in tungsten heavy pseudoalloys is substantial for the microstructure optimization. These characteristics were determined in cold and warm rotary swaged W/NiCo composite with help of neutron diffraction. The results were discussed in view of the observed microstructure and mechanical properties. The investigated bars consisted of tungsten agglomerates (bcc lattice) surrounded by NiCo-based matrix (fcc lattice). No preferential crystallographic orientation was found in the as-sintered bar. A strong texture was formed in both the tungsten agglomerates ( fiber texture parallel to the swaging axis) and in the NiCo-based matrix ( fiber texture) after rotary swaging. Although usually of double-fiber texture, the fiber of the fcc structures was nearly missing in the matrix. Further, the cold-swaged bar exhibited substantially stronger texture for both phases which corresponds to the higher measured ultimate tensile strength. The residual stress differences were employed for characterization of the stress state of the bars. The largest residual stress difference (approximate to 400 MPa) was found at the center of the bar deformed at room temperature. The hoop stresses were non-symmetrical with respect to the swaging axis, which was likely caused by the elliptical cross section of the as-sintered bar. Workplace Nuclear Physics Institute Contact Markéta Sommerová, sommerova@ujf.cas.cz, Tel.: 266 173 228 Year of Publishing 2021 Electronic address https://doi.org/10.3390/ma13122869
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