Synthesis of biocompatible high-entropy alloy TiNbZrTaHf by high-pressure torsion
نویسندگان
چکیده
High-entropy alloys (HEAs), a novel type of materials with high configurational entropy, have aroused huge interest due to promising range functional properties including biocompatibility. In this study, the high-pressure torsion (HPT) method was implemented as mechanical alloying route synthesize biocompatible nanostructured HEAs bcc structure. An equiatomic quinary TiNbZrTaHf HEA successfully synthesized via HPT and its characteristics were compared binary TiNb, ternary TiNbZr quaternary TiNbZrTa an insight into effect entropy on microstructure these biomaterials. The grain size decreased, strain-rate sensitivity reduced, hardness increased increasing number principal elements from 2 3, but variations became less significant further increase in entropy. Small nanograins, solid solution hardening, dislocation activity together led 564 Hv moderate elastic modulus 79 GPa which are for biomedical applications.
منابع مشابه
Dual mechanisms of grain refinement in a FeCoCrNi high-entropy alloy processed by high-pressure torsion
An equiatomic FeCoCrNi high-entropy alloy with a face-centered cubic structure was fabricated by a powder metallurgy route, and then processed by high-pressure torsion. Detailed microscopy investigations revealed that grain refinement from coarse grains to nanocrystalline grains occurred mainly via concurrent nanoband (NB) subdivision and deformation twinning. NB-NB, twin-NB and twin-twin inter...
متن کاملHardening and thermal stability of a nanocrystalline CoCrFeNiMnTi0.1 high-entropy alloy processed by high- pressure torsion
A CoCrFeNiMnTi0.1 high-entropy alloy (HEA) was subjected to high-pressure torsion (HPT) processing under 6.0 GPa pressure up to 10 turns. XRD results reveal that the initial and HPT-processed microstructures consist of a single fcc phase and there is no evidence for creating a new phase and the occurrence of a phase transformation during HPT processing. It is shown that there is a gradual evolu...
متن کاملNumerical Analysis of Severe Plastic Deformation by High Pressure Torsion
High-pressure torsion (HPT) is a metal processing method in which the sample is subjected to a very high plastic shear deformation. This process can produce exceptional levels of grain refinement, and provides a corresponding improvement in mechanical properties. To investigate the stress and strain distribution due to HPT process finite element simulation were conducted to investigate effectiv...
متن کاملHardening of an Al0.3CoCrFeNi high entropy alloy via high-pressure torsion and thermal annealing
High-pressure torsion (HPT) and thermal annealing were applied to a face-centered cubic as-cast Al0.3CoCrFeNi high entropy alloy. Processing by HPT produced a nanostructure with a higher incremental hardness than in most HPT single-phase materials and subsequent annealing at appropriate temperatures gave an ordered body-centered cubic secondary phase with an additional increase in hardness. The...
متن کاملHigh 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 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: Materials Science and Engineering A-structural Materials Properties Microstructure and Processing
سال: 2021
ISSN: ['0921-5093', '1873-4936']
DOI: https://doi.org/10.1016/j.msea.2021.141869