Hongbin Bei
Zhejiang University
IrradiationUltimate tensile strengthAmorphous metalSolid solutionDeformation (engineering)IonDislocationChemical physicsComposite materialEutectic systemMetallurgyMaterials scienceCondensed matter physicsAlloyNialHigh entropy alloysNanoindentationPlasticityCrystallographyMicrostructureThermodynamics
289Publications
62H-index
14.1kCitations
Publications 268
Newest
#1X.L. Li (Hunan University)H-Index: 2
#2Zhongtao Li (Hunan University)H-Index: 1
Last. Yanfei Gao (UT: University of Tennessee)H-Index: 38
view all 7 authors...
Abstract In the current work, a parallel comparison of the influence of Al, Mo and Ti, on the microstructure and strengthening of the CoCrFeNi alloy was conducted. To achieve this, inconsistencies on variables including the extent of alloying, thermomechanical processing and property-evaluation method were avoided. Microstructurally, following cold-rolling, annealing of the 4 at.% Al-doped alloys at 800-1000 °C did not result in phase separation; nevertheless, that of the 4 at.% Mo- and Ti-doped...
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#1Wanshun Xia (ZJU: Zhejiang University)H-Index: 2
#2Xinbao Zhao (ZJU: Zhejiang University)H-Index: 4
Last. Ze Zhang (ZJU: Zhejiang University)H-Index: 77
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Abstract The creep inconsistency between dendrite core and interdendritic region is investigated in a nickel-based single crystal superalloy under 1373 K and 137 MPa. Two specimens with higher and lower degree of elemental inhomogeneity on dendritic structures are compared. For specimen with higher inhomogeneity, stronger segregation of refractory elements reinforces the local strength in dendrite core, but damages the strength in interdendritic region. Creep strain is accumulated faster in inte...
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#1Saro San (UMKC: University of Missouri–Kansas City)H-Index: 3
#2Yang Tong (ORNL: Oak Ridge National Laboratory)H-Index: 17
Last. Wai-Yim Ching (UMKC: University of Missouri–Kansas City)H-Index: 77
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Abstract null null Exceptional properties of high entropy alloys (HEAs) are attributed to the disordered random solid solution of multiple alloying elements. Despite numerous studies, the fundamental understanding at the electronic and atomic levels is still missing. We report a comparative study of four fcc HEAs of NiFeCoCr and NiFeCoCrX (X = Mn, Cu, or Pd) based on ab initio calculations using large supercells with 500 atoms in equal composition. After fully optimizing their structures using t...
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#1Qingqing Ding (ZJU: Zhejiang University)H-Index: 9
#2Hongbin Bei (ZJU: Zhejiang University)H-Index: 62
Last. Ze Zhang (ZJU: Zhejiang University)H-Index: 77
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Abstract The GH3536 (Hastelloy X) superalloy is one of the most widely used Ni-based sheet alloys for gas turbine hot parts. In order to investigate its relationship among the processing, microstructure, and mechanical properties, GH3536 alloy was fabricated from pure constituent elements by arc melting and drop casting. The drop-cast ingots were homogenized, cold rolled and recrystallized to obtain single phase microstructure with average grain size of ∼ 12 μm. Tensile tests were then performed...
3 CitationsSource
#1Qingqing DingH-Index: 9
Last. Ze ZhangH-Index: 3
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#1Yujie Chen (ZJU: Zhejiang University)H-Index: 1
#2Yan Fang (ZJU: Zhejiang University)H-Index: 1
Last. Qian Yu
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Abstract Solid solution strengthening is one of the most conventional strategies for optimizing alloys strength, while the corresponding mechanisms can be more complicated than we traditionally thought specifically as heterogeneity of microstructure is involved. In this work, by comparing the change of chemical distribution, dislocation behaviors and mechanical properties after doping equivalent amount of tungsten (W) atoms in CrCoNi alloy and pure Ni, respectively, it is found that the alloying...
6 CitationsSource
#1Di Xie (UT: University of Tennessee)H-Index: 2
#2Zongyang Lyu (UT: University of Tennessee)H-Index: 2
Last. Yanfei Gao (UT: University of Tennessee)H-Index: 38
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Abstract Unlike many Mg alloys that exhibit limited ductility, duplex Mg-Li alloys possess enhanced ductility but the underlying mechanisms are unclear. Using real-time in situ neutron diffraction measurements, we show that the underlying deformation modes in this duplex microstructure include an early yield of body-centered-cubic (BCC) β-Li phase and the later elevated hardening in this phase at large macroscopic plastic strain, and the sequential activation of basal and pyramidal slip systems ...
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#1K.M. BertschH-Index: 6
#2Kelly E. Nygren (UW: University of Wisconsin-Madison)H-Index: 7
Last. Akihide Nagao (International Institute of Minnesota)H-Index: 14
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Abstract The fundamental mechanism of hydrogen embrittlement was investigated in the high-entropy alloy FeNiCoCrMn using slow strain rate tensile tests with and without internal hydrogen. Hydrogen induced intergranular failure and reduced the average grain elongation parallel to the tensile axis, but also increased the local plasticity within grains. The influence of hydrogen on plasticity establishes a compatibility constraint across grain boundaries, which results in failure along the hydrogen...
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#1Matheus A. Tunes (University of Huddersfield)H-Index: 9
#2Graeme Greaves (University of Huddersfield)H-Index: 14
Last. Cláudio Geraldo Schön (USP: University of São Paulo)H-Index: 15
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Abstract Two metallic alloys in the quaternary system Fe–Cr–Mn–Ni were irradiated in situ within a transmission electron microscope (TEM) using Xe+ heavy ions in the temperature range of 293–873 K and in the regime of low- (30 keV) and medium-energies (300 keV) with respective maximum doses of around 40 and 140 dpa. The first alloy is the FeCrMnNi high-entropy alloy (HEA) synthesised with the alloying elements close to equimolar composition. The second alloy is a commercial austenitic stainless ...
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#1Cody A. Dennett (INL: Idaho National Laboratory)H-Index: 10
Last. Khalid Mikhiel HattarH-Index: 26
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While the high-temperature void swelling behavior in Ni-based concentrated solid solution alloys (CSAs) has received much attention, work to date has relied on traditional, post-irradiation microscopy to quantify swelling. Here, the dynamic evolution of swelling in five alloys of increasing complexity is observed using continuous, in situ measurements of thermoelastic properties in bulk specimens under ion beam irradiation. The evolution in elastic properties during swelling is found to be a fun...