Weili Ren
Shanghai University
Ultimate tensile strengthMagnetic fieldTransmission electron microscopyTransverse planeComposite materialEutectic systemMetallurgyMaterials scienceSuperalloyCrystal growthScanning electron microscopeCondensed matter physicsDirectional solidificationAlloyChemical engineeringPhase (matter)NucleationThermoelectric effectSingle crystalDendrite (crystal)MicrostructureMagnetostatics
89Publications
17H-index
999Citations
Publications 88
Newest
#1Peijian ShiH-Index: 2
#2Yat LiH-Index: 92
Last. Yunbo ZhongH-Index: 19
view all 17 authors...
Abstract Over recent years, eutectic high-entropy alloys (EHEAs) have intrigued substantial research enthusiasms due to their good castability as well as balanced strength–ductility synergy. In this study, a bulk cast Al19.25Co18.86Fe18.36Ni43.53 EHEA is developed with fine in-situ lamellar eutectics. The eutectics comprise alternating ordered face-centered-cubic (L12) and ordered body-centered-cubic (B2) phases with semi-coherent interfaces. The resulting microstructure resembles that of most r...
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#1Biao Ding (SHU: Shanghai University)H-Index: 6
#2Weili Ren (SHU: Shanghai University)H-Index: 17
Last. Peter K. Liaw (UT: University of Tennessee)H-Index: 93
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Abstract High total strain-controlled creep-fatigue tests of 1.8% were performed for a directionally-solidified Ni-based superalloy, DZ445, at 900 °C in air. Dwell times of 0, 2, and 5 min. were introduced at the tensile peak strain for each cycle. Experimental results show a decrease in fatigue life with increasing dwell time. The significant cyclic softening is observed after the application of the dwell time. The mean compressive stress and large plastic-strain accumulation are produced due t...
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#1Yifeng Guo (SHU: Shanghai University)H-Index: 1
#2Zhibin Xia (SHU: Shanghai University)H-Index: 3
Last. Yunbo Zhong (SHU: Shanghai University)H-Index: 19
view all 9 authors...
Abstract Magnetic-controlled Electroslag Remelting (MC-ESR) process has been proposed to improve the inclusion removal efficiency in recent years. In this study, the effects of transverse static magnetic field (TSMF) on liquid melting film (LMF) and inclusion removal during this period in ESR process of GCr15 steel were studied by a series of MC-ESR experiments. The thickness of the characteristic position of LMF was reduced by 27.2%∼80.5% when a 65mT TSMF was applied. The number and size of the...
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#1Yifeng Guo (SHU: Shanghai University)H-Index: 1
#2Zhibin Xia (SHU: Shanghai University)H-Index: 3
Last. Yunbo Zhong (SHU: Shanghai University)H-Index: 19
view all 9 authors...
Magnetic-controlled Electroslag Remelting (MC-ESR) process has been proposed to improve the inclusion removal efficiency in recent years. In this study, the effects of axial static magnetic field (ASMF) on liquid melting film (LMF) and inclusion removal during this period in ESR process of GCr15 steel were studied by a series of MC-ESR experiments. The thickness of the characteristic position of LMF was reduced by 18.6 to 90.3 pct when a 50 mT ASMF was applied. The number and size of the inclusi...
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#1Xiaotan Yuan (SHU: Shanghai University)H-Index: 1
#2Tao Zhou (SHU: Shanghai University)H-Index: 1
Last. Yunbo Zhong (SHU: Shanghai University)H-Index: 19
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Abstract The mechanical-property improvement of directionally-solidified Nickel-based single crystal (SC) superalloy with the single-direction magnetic fields is limited by their destructiveness on the dendritic microstructure. Here, the work present breaks through the bottleneck. It shows that the application of the cusp magnetic field (CMF) ensures that the dendrites are not destroyed. This feature embodies that the primary dendrite trunks arrange regularly and orderly, as well the secondary d...
1 CitationsSource
#1Yanfei Gao (UT: University of Tennessee)H-Index: 37
#2Wei Zhang (UT: University of Tennessee)H-Index: 106
Last. Yifei Zhong (SHU: Shanghai University)H-Index: 16
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Abstract Among various mechanisms responsible for the strength-ductility trade-off in metallic materials, the leading strategy is to delay the onset of necking by improving the work hardening rate via a number of metallurgical approaches such as heterogeneous or gradient microstructures. Recent research activities on high-entropy alloys also witness a wide range of alloy design capabilities that permit these microstructural designs such as the dual-phase lamellar microstructures. This work addre...
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#1Peijian Shi (SHU: Shanghai University)H-Index: 2
#2Yunbo Zhong (SHU: Shanghai University)H-Index: 19
Last. Yuntian Zhu (Nanjing University of Science and Technology)H-Index: 111
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Abstract High strength of materials usually comes with low ductility due to the lost or short-lived strain hardening. Here, we uncover a sequentially-activated multistage strain hardening (SMSH) that allows for sustained and effective strain-hardening capability in strong ultrafine-grained eutectic high-entropy alloy (EHEA). Consequently, exceptional ductility is realized in an ultrafine-grained EHEA, accompanied with high ultimate strength. We demonstrate that the SMSH is derived from a coordin...
4 CitationsSource
#1ChuXiong SunH-Index: 2
#2Yifeng GuoH-Index: 1
Last. Yunbo ZhongH-Index: 1
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Electroslag remelting (ESR) is an effective method for removing nonmetallic inclusions from steels or alloys. The main stage of inclusion removal during ESR is the aggregation of liquid metal film (LMF) to form droplets at the consumable electrode tip. In this study, a lab-level ESR experiment was carried out. The number and size of inclusions at the characteristic position of the electrode were quantitatively counted. The number of inclusions in the center position of LMF were larger than that ...
3 CitationsSource
#1Huaqiang ChenH-Index: 1
#2Xiaotan YuanH-Index: 1
Last. Yunbo ZhongH-Index: 19
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1 CitationsSource
#1Chunmei LiuH-Index: 1
#2Yunbo Zhong (SHU: Shanghai University)H-Index: 19
Last. Zhongming Ren (SHU: Shanghai University)H-Index: 30
view all 8 authors...
Fe–6.5 Si–0.05 B alloy was used in the study to investigate the texture evolution and magnetic property of the ferromagnetic crystal under an axial high magnetic field during bulk solidification. Optical microscopy (OM) and X-ray diffraction (XRD) were applied to analyze the microstructures and texture evolution of the alloy solidified under different magnetic field intensities. The result shows that with an increase in the magnetic field intensity from 0 to 2 T, the texture gradually changes fr...
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