New structure in refractory high-entropy alloys
Source abstract
Abstract
Abstract The microstructure of a new refractory high-entropy alloy of composition close to Ti 35 Zr 27.5 Hf 27.5 Nb 5 Ta 5 prepared by arc melting and induction techniques was investigated using X-Ray diffraction (XRD) and transmission electron microscopy (TEM). This alloy presents optimal empirical parameters for the formation of a solid solution phase. The as-cast material displays a density of 8480 kg m −3 and a Vickers microhardness close to 2400 MPa. While the Rietveld refinement of XRD data indicates an orthorhombic (martensite) α׳׳-type structure for the bulk alloy, TEM observations prove that the alloy exhibits a twinned hexagonal structure as thin foil. An orthorhombic–hexagonal transformation by stress relaxation during TEM sample preparation is discussed.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: High Entropy Alloys Studies · High-Temperature Coating Behaviors · Advanced materials and composites
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (18)
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1. Nanostructured high-entropy alloys with multiple principal elements: novel alloy design concepts and outcomes10.1002/adem.200300567 ↗
2. Microstructural development in equiatomic multicomponent alloys10.1016/j.msea.2003.10.257 ↗
3. Solid-solution phase formation rules for multi-component alloys10.1002/adem.200700240 ↗
4. More than entropy in high-entropy alloys: forming solid solutions or amorphous phase10.1016/j.intermet.2013.05.002 ↗
5. Prediction of high-entropy stabilized solid-solution in multi-component alloys10.1016/j.matchemphys.2011.11.021 ↗
6. Microstructure characterization of Al x CoCrCuFeNi high-entropy alloy system with multiprincipal elements10.1007/s11661-005-0283-0 ↗
7. Novel microstructure and properties of multicomponent CoCrCuFeNiTix alloys10.1016/j.intermet.2006.08.005 ↗
8. Refractory high-entropy alloys10.1016/j.intermet.2010.05.014 ↗
9. Mechanical properties of Nb25Mo25Ta25W25 and V20Nb20Mo20Ta20W20 refractory high entropy alloys10.1016/j.intermet.2011.01.004 ↗
10. Microstructure and room temperature properties of a high-entropy TaNbHfZrTi alloy10.1016/j.jallcom.2011.02.171 ↗
11. Phase stability in high entropy alloys: formation of solid-solution phase or amorphous phase10.1016/S1002-0071(12)60080-X ↗
12. Classification of bulk metallic glasses by atomic size difference, heat of mixing and period of constituent elements and its application to characterization of the main alloying element10.2320/matertrans.46.2817 ↗
13. Larson · 2004
14. EXPGUI, a graphical user interface for GSAS10.1107/S0021889801002242 ↗
15. Automatic crystal orientation and phase mapping in TEM by precession diffraction
16. Structure of orthorhombic martensitic phase in binary Ti–Nb alloys
17. Martensitic transformations in titanium–tantalum alloys10.1080/14786437208223852 ↗
18. Mechanisms of deformation in gum metal TNTZ-O and TNTZ titanium alloys: a comparative study on the oxygen influence10.1016/j.actamat.2011.06.006 ↗