Deformation mechanisms in hexagonal close-packed high-entropy alloys
نویسندگان
چکیده
Single-phase hexagonal close-packed structure of the ScYLaGdTbDyHoErLu high-entropy alloy was studied in detail. The applicability rule mixture analyzed with respect to lattice constant, mechanical parameters, elastic properties, melting point, and hardness alloy. Significant tension-compression asymmetry has been found explained by strength differential effect during uniaxial tests. Numerous deformation twins high densities stacking faults can be observed from morphological characterization a transmission electron microscope, which governs main mechanism plastic current
منابع مشابه
High pressure synthesis of a hexagonal close-packed phase of the high-entropy alloy CrMnFeCoNi
High-entropy alloys, near-equiatomic solid solutions of five or more elements, represent a new strategy for the design of materials with properties superior to those of conventional alloys. However, their phase space remains constrained, with transition metal high-entropy alloys exhibiting only face- or body-centered cubic structures. Here, we report the high-pressure synthesis of a hexagonal c...
متن کاملA Criterion for Topological Close-Packed Phase Formation in High Entropy Alloys
The stability of topological close-packed (TCP) phases were found to be well related to the average value of the d-orbital energy level ( Md ) for most reported high entropy alloys (HEAs). Excluding some HEAs that contain high levels of the elements aluminum and vanadium, the results of this study indicated that the TCP phases form at Md > 1.09. This criterion, as a semi-empirical method, can p...
متن کاملLocal Stress States and Microstructural Damage Response Associated with Deformation Twins in Hexagonal Close Packed Metals
The current work implements a correlative microscopy method utilizing electron back scatter diffraction, focused ion beam and digital image correlation to accurately determine spatially resolved stress profiles in the vicinity of grain/twin boundaries and tensile deformation twin tips in commercially pure titanium. Measured local stress gradients were in good agreement with local misorientation...
متن کاملThe Strength of Binary Junctions in Hexagonal Close-Packed Crystals
A comparative study of non-coplanar binary dislocation junctions in magnesium (Mg) and beryllium (Be) is presented to examine the effects of elastic properties and active Burgers vectors on junction formation and destruction in hexagonal close-packed (hcp) crystals via discrete dislocation dynamics simulations. Two junction configurations formed at intersecting prismatic ð01 10Þ=basal ð0001Þ pl...
متن کاملDislocation Dynamics Simulations of Junctions in Hexagonal Close-Packed Crystals
The formation and strength of dislocations in the hexagonal closed packed material beryllium are studied through dislocation junctions and the critical stress required to break them. Dislocation dynamics calculations (using the code ParaDiS) of junction maps are compared to an analytical line tension approximation in order to validate our model. Results show that the two models agree very well....
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of Applied Physics
سال: 2021
ISSN: ['1089-7550', '0021-8979', '1520-8850']
DOI: https://doi.org/10.1063/5.0045414