hot deformation behavior of the high entropy alloy
Constitutive modelling of hot deformation behaviour of a
Constitutive modelling of hot deformation behaviour of a CoCrFeMnNi high-entropy alloy Madan Patnamsetty a Ari Saastamoinen Mahesh C. Somani b and Pasi Peura aMaterials Science and Environmental Engineering Tampere University Tampere Finland bMaterials and Mechanical Engineering Centre for Advanced Steels Research University of Oulu Oulu Finland
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Nov 01 2020 · At present the hot deformation behavior of high entropy alloys is mainly around Face-centered cubic (FCC) alloys such as FeCoNiCrMn 26 28 30 . Compared with these high-entropy alloys the research on the hot deformation of RHEAs is still rare although Senkov 23 Guo 24 31 and Eteti 32 have done some in this area.
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In the present study hot deformation behavior of a FCC high-entropy alloy CoCuFeMnNi has been investigated to explore the stress–strain response for a wide range of temperatures and strain rates.
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A. Uniaxial creep Creep of the Al 0.15 CoCrFeNi and Al 0.6 CoCrFeNi HEAs was explored by employing the uniaxial stress-relaxation tests. Reference Youssef Zaddach Niu Irving and Koch 11 The HEA samples with a diameter of 5 mm and a gauge length of 25 mm were loaded up to a strain of 0.2 at a loading rate of 8 10 −5 s −1 and temperature of 580–700 °C (0.3–0.5 T m where T m is
Get PriceCooperative deformation in high-entropy alloys at ultralow
High-entropy alloys exhibit exceptional mechanical properties at cryogenic temperatures due to the activation of twinning in addition to dislocation slip. The coexistence of multiple deformation pathways raises an important question regarding how individual deformation mechanisms compete or synergize during plastic deformation. Using in situ neutron diffraction we demonstrate the interaction
Get PriceCompressive deformation behavior of CrMnFeCoNi high
Oct 30 2016 · The compressive deformation behavior of a single phase CrMnFeCoNi high-entropy alloy (HEA) is investigated using experimental and theoretical approaches. The equiaxed microstructures are observed using optical microscope electron backscattered diffraction and synchrotron X-ray diffraction (XRD) techniques. Compressive results reveal that the CrMnFeCoNi HEA has a high strain
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adshelp at cfa.harvard.edu The ADS is operated by the Smithsonian Astrophysical Observatory under NASA Cooperative Agreement NNX16AC86A
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Hot deformation behaviors of an ultrafine-grained MoNbTaTiV refractory high-entropy alloy fabricated by powder metallurgy February 2021 Materials Science and Engineering A 809 140922
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T1Fundamental deformation behavior in high-entropy alloys. T2An overview. AUDiao H. Y. AUFeng R. AUDahmen K. A. AULiaw P. K. PY2017/10. Y12017/10. N2High-entropy alloys (HEAs) as a new class of materials are nearly equiatomic and multi-element systems which can crystallize as a single phase or multi-phases
Get PriceConstitutive modelling of hot deformation behaviour of a
Constitutive modelling of hot deformation behaviour of a CoCrFeMnNi high-entropy alloy Madan Patnamsetty a Ari Saastamoinen Mahesh C. Somani b and Pasi Peura aMaterials Science and Environmental Engineering Tampere University Tampere Finland bMaterials and Mechanical Engineering Centre for Advanced Steels Research University of Oulu Oulu Finland
Get PriceConstitutive modelling of hot deformation behaviour of a
Constitutive modelling of hot deformation behaviour of a CoCrFeMnNi high-entropy alloy Madan Patnamsetty a Ari Saastamoinen Mahesh C. Somani b and Pasi Peura aMaterials Science and Environmental Engineering Tampere University Tampere Finland bMaterials and Mechanical Engineering Centre for Advanced Steels Research University of Oulu Oulu Finland
Get PriceConstitutive modelling of hot deformation behaviour of a
In this study constitutive equations based on the hyperbolic-sinusoidal Arrhenius-type model have been developed to define the hot deformation characteristics of a CoCrFeMnNi high-entropy alloy. The experimental true stress-true strain data were generated over a wide temperature ( K) and strain rates (10 -3 -10 s -1 ) ranges.
Get PriceHot deformation behavior of CrMnFeCoNi equiatomic FCC
The present work attempts to understand the hot deformation behavior of high entropy alloys (HEAs) with particular reference to microstructure and texture formation. Equiatomic CoCrFeMnNi with simple FCC structure is studied as the model alloy system. The hot deformation has been carried out by varying the processing parameters.
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Feb 06 2014 · Deformation behavior of a high-entropy alloy (HEA) was investigated by in situ tensile deformation with neutron diffraction. It was found that the face-centered cubic (FCC) HEA alloy showed strong crystal elastic and plastic anisotropy and the evolution of its lattice strains and textures were similar to those observed in conventional FCC
Get PriceCooperative deformation in high-entropy alloys at ultralow
High-entropy alloys exhibit exceptional mechanical properties at cryogenic temperatures due to the activation of twinning in addition to dislocation slip. The coexistence of multiple deformation pathways raises an important question regarding how individual deformation mechanisms compete or synergize during plastic deformation. Using in situ neutron diffraction we demonstrate the interaction
Get PricePhase Stability and Deformation Behavior of TiZrHfNbO High
Nov 13 2020 · Strengthened by Oxygen doping the single-phase body-center-cubic (BCC) TiZrHfNbO refractory high-entropy alloys (HEAs) become strong and ductile. However phase stability at intermediate temperature and the effects of Oxygen addition on the deformation behavior during tensile tests need to be well understood. In the present work the phase decomposition of (TiZrHfNb)100-xOx
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adshelp at cfa.harvard.edu The ADS is operated by the Smithsonian Astrophysical Observatory under NASA Cooperative Agreement NNX16AC86A
Get PriceTemperature dependence of elastic and plastic deformation
Single-phase solid-solution refractory high-entropy alloys (HEAs) show remarkable mechanical properties such as their high yield strength and substantial softening resistance at elevated temperatures. Hence the in-depth study of the deformation behavior for body-centered cubic (BCC) refractory HEAs is a critical issue to explore the uncovered/unique deformation mechanisms.
Get PriceMATERIALS SCIENCE Copyright © 2020 Temperature
Single-phase solid-solution refractory high-entropy alloys (HEAs) show remarkable mechanical properties such as their high yield strength and substantial softening resistance at elevated temperatures. Hence the in-depth study of the deformation behavior for body-centered cubic (BCC) refractory HEAs is a critical issue to explore the
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May 15 2020 · High-temperature tensile deformation behavior of hot rolled CrMnFeCoNi high-entropy alloy. J. Alloy. Compd. 730 242–248 (2018). CAS
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In this study a eutectic high entropy alloy CoCrFeNiNb 0.45 was chosen for a hot deformation study. The alloy consists of a primary face-centered cubic (FCC) phase (CoCrFeNi rich) and a eutectic region between the FCC and Laves phase (Co 2 Nb type). The combination of FCC and eutectic region is expected to provide better strength and ductility.
Get PriceUnusual plastic deformation behavior of nanotwinned Cu
Unusual plastic deformation behavior of nanotwinned Cu/high entropy alloy FeCoCrNi nanolaminates† Y. F. Zhao a J. Y. Zhang a Y. Q. Wang a K. Wu a G. Liu a and J. Sun a
Get PriceInsights into the deformation behavior of the CrMnFeCoNi
Jul 27 2017 · Insights into the deformation behavior of the CrMnFeCoNi high-entropy alloy revealed by elevated temperature nanoindentationVolume 32 Issue 14Verena Maier-Kiener Benjamin Schuh Easo P. George Helmut Clemens Anton Hohenwarter
Get PriceTemperature effects on deformation and serration behavior
In this study high-entropy alloys (HEAs) are new alloys that contain five or more elements in roughly-equal proportion. We present new experiments and theory on the deformation behavior of HEAs under slow stretching (straining) and observe differences compared to conventional alloys
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adshelp at cfa.harvard.edu The ADS is operated by the Smithsonian Astrophysical Observatory under NASA Cooperative Agreement NNX16AC86A
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Temperature dependence of elastic and plastic deformation behavior of a refractory high-entropy alloy Chanho Lee George Kim Yi-Chia Chou Brianna L. Musico Michael C. Gao Ke An Gian Song Yi-Chia Chou Veerle Keppens Wei Chen Peter K. Liaw
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Sep 17 2020 · The potential of high-entropy alloys (HEAs) to meet or exceed austenitic stainless steel performance with the additional benefit of improved hot corrosion/oxidation resistance makes FCC HEAs attractive for use in energy applications. While shorter-term creep tests have been reported in the literature on HEAs not all methodologies utilize repeatable techniques.
Get PriceUnusual plastic deformation behavior of nanotwinned Cu
Unusual plastic deformation behavior of nanotwinned Cu/high entropy alloy FeCoCrNi nanolaminates† Y. F. Zhao a J. Y. Zhang a Y. Q. Wang a K. Wu a G. Liu a and J. Sun a
Get PriceHot Deformation Behavior of As-Cast and Homogenized Al 0
The hot deformation behavior of as-cast and homogenized Al0.5CoCrFeNi high entropy alloys (HEAs) during isothermal compression was investigated as a function of temperature and strain rate. Results indicated that flow stress in a homogenized state was always higher than that in an as-cast state under the same deformation conditions. Moreover the optimum thermo-mechanical processing (TMP
Get PriceMicrostructure Refinement of a Transformation-Induced
The hot deformation behavior and microstructure evolution of a representative transformation induced plasticity (TRIP) high-entropy alloy (HEA) with a composition of Co 35 Cr 25 Mn 15 Ni 15 Fe 10 (at. ) were investigated. The hot-compression was conducted to a true strain of
Get PriceTemperature dependence of elastic and plastic deformation
Single-phase solid-solution refractory high-entropy alloys (HEAs) show remarkable mechanical properties such as their high yield strength and substantial softening resistance at elevated temperatures. Hence the in-depth study of the deformation behavior for body-centered cubic (BCC) refractory HEAs is a critical issue to explore the uncovered/unique deformation mechanisms.
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