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The objective of the study is to investigate the strengthening mechanism of embedded meta-precipitates in the design of architected metamaterials. Four precipitate-type architected metamaterials are designed and prepared by fused deposition modelling (FDM). The difference of mechanical properties and deformation mode of these structures is analyzed. The strengthening effect of the introduced meta-precipitates is then compared with Orowan bypass strengthening mechanism. The similarities and discrepancies of metallurgical hardening principles and that found in architected metamaterials are established. It is found that due to the introduction of embedded meta-precipitates, the deformation of the structure changes significantly from diagonal crushing to a meander route, thus improves the mechanical properties and energy absorption abilities. The hindering effect and the influence of volume fraction of meta-precipitates is similar to Orowan bypass mechanism.
Zhehao Lu; Wenyuan Yan; Pengfei Yan; Biao Yan. A Novel Precipitate-Type Architected Metamaterial Strengthened via Orowan Bypass-Like Mechanism. Applied Sciences 2020, 10, 7525 .
AMA StyleZhehao Lu, Wenyuan Yan, Pengfei Yan, Biao Yan. A Novel Precipitate-Type Architected Metamaterial Strengthened via Orowan Bypass-Like Mechanism. Applied Sciences. 2020; 10 (21):7525.
Chicago/Turabian StyleZhehao Lu; Wenyuan Yan; Pengfei Yan; Biao Yan. 2020. "A Novel Precipitate-Type Architected Metamaterial Strengthened via Orowan Bypass-Like Mechanism." Applied Sciences 10, no. 21: 7525.
The appearance of thin film metallic glasses (TFMGs) is gaining increasing interest because of their unique mechanical and anticorrosion properties and potential engineering applications. In this study, Cu–Zr–Al ternary thin film metallic glasses were fabricated by using DC magnetron sputtering equipment with various target powers. The evolution of the structure was systematically investigated by grazing incidence X-ray diffractometer, scanning electron microscopy, and transmission electron microscopy. The deposition rate increases with the increasing of applied target power. The as-deposited thin films show an amorphous structure. The compositional fluctuations on the nanometer scale indicate the presence of two Cu- and Zr-rich amorphous phases. The electrochemical corrosion measurements indicated that Cu–Zr–Al thin film metallic glasses had good corrosion resistance in the sulfuric acid solution. Nanoindentation results showed that the mechanical deformation was found to be homogenous and reproducible with a high value range for the hardness and modulus.
Xianshun Wei; Chengxi Ying; Jing Wu; Haoran Jiang; Biao Yan; Jun Shen. Fabrication, Corrosion, and Mechanical Properties of Magnetron Sputtered Cu–Zr–Al Metallic Glass Thin Film. Materials 2019, 12, 4147 .
AMA StyleXianshun Wei, Chengxi Ying, Jing Wu, Haoran Jiang, Biao Yan, Jun Shen. Fabrication, Corrosion, and Mechanical Properties of Magnetron Sputtered Cu–Zr–Al Metallic Glass Thin Film. Materials. 2019; 12 (24):4147.
Chicago/Turabian StyleXianshun Wei; Chengxi Ying; Jing Wu; Haoran Jiang; Biao Yan; Jun Shen. 2019. "Fabrication, Corrosion, and Mechanical Properties of Magnetron Sputtered Cu–Zr–Al Metallic Glass Thin Film." Materials 12, no. 24: 4147.
The addition of rare earth element Ce in ferritic stainless steel can improve the high temperature performance to meet the service requirements of automobile exhaust systems at high temperatures. Automobile exhaust systems are generally applied as welded pipes, so it is necessary to study the effect of Ce on the weldability of ferritic stainless steel. In this study, the Trans-varestraint test method was used to test the solidification crack sensitivities of 441 and 441Ce ferritic stainless steel. The 441Ce steel, which has added Ce, showed poor resistance to weld solidification cracking. Using Thermo-Calc software, Ce was observed to expand the solidification temperature range of 441 ferritic stainless steel, increase the time for solid–liquid coexistence during solidification, and increase the sensitivity of solidification cracking. Further, from scanning electron microscopy and energy dispersive spectrometer analysis, the addition of Ce was found to reduce high temperature precipitation (Ti,Nb)(C,N), reduce or even eliminate the “pinning” effect during solidification, and increase solidification crack sensitivity of 441 ferritic stainless steel.
Shuangchun Zhu; Biao Yan. Effects of Cerium on Weld Solidification Crack Sensitivity of 441 Ferritic Stainless Steel. Metals 2019, 9, 372 .
AMA StyleShuangchun Zhu, Biao Yan. Effects of Cerium on Weld Solidification Crack Sensitivity of 441 Ferritic Stainless Steel. Metals. 2019; 9 (3):372.
Chicago/Turabian StyleShuangchun Zhu; Biao Yan. 2019. "Effects of Cerium on Weld Solidification Crack Sensitivity of 441 Ferritic Stainless Steel." Metals 9, no. 3: 372.
The impact properties of TC10 treated with different solid solution temperature were tested. The microstructure change and fracture morphology were observed. The effect of solution temperature on the impact properties of TC10 titanium alloy was studied. The results show that with the increase of solution temperature, the primary alpha phase decreases, when the temperature reached 950 degrees, all of the primary alpha phase changed into the beta phase. From the fracture appearance, the specimen changes from ductile fracture to brittle fracture, impact properties change with the temperature increased first and then decreased, appeared in the middle of a stable maximum value.
Gui Hong Qin; Biao Yan; Bo Ji; Wei Lu. Effect of Heat Treatment on Impact Properties of TC10 Titanium Alloy. Materials Science Forum 2018, 941, 725 -729.
AMA StyleGui Hong Qin, Biao Yan, Bo Ji, Wei Lu. Effect of Heat Treatment on Impact Properties of TC10 Titanium Alloy. Materials Science Forum. 2018; 941 ():725-729.
Chicago/Turabian StyleGui Hong Qin; Biao Yan; Bo Ji; Wei Lu. 2018. "Effect of Heat Treatment on Impact Properties of TC10 Titanium Alloy." Materials Science Forum 941, no. : 725-729.
In this investigation, the surface-rolling process was performed to improve the performance of PM (powder metallurgy) parts. Different rolling temperatures were applied and the effect of rolling temperature on the microstructure and mechanical properties of the surface dense layers in the samples were investigated. In the study, room temperature and temperatures of 100 °C, 200 °C, 300 °C were studied during the rolling process. The results confirmed that the sample prepared with a pre-heated temperature of 200 °C had the lowest porosity at the surface area. It also exhibited the highest surface hardness and wear resistance. The optimum rolling temperature was determined to be 200 °C and the related mechanism was discussed.
Di Chen; Dekai Li; Jingguang Peng; Taolei Wang; Biao Yan; Wei Lu. The Effect of Rolling Temperature on the Microstructure and Mechanical Properties of Surface-Densified Powder Metallurgy Fe-Based Gears Prepared by the Surface Rolling Process. Metals 2017, 7, 420 .
AMA StyleDi Chen, Dekai Li, Jingguang Peng, Taolei Wang, Biao Yan, Wei Lu. The Effect of Rolling Temperature on the Microstructure and Mechanical Properties of Surface-Densified Powder Metallurgy Fe-Based Gears Prepared by the Surface Rolling Process. Metals. 2017; 7 (10):420.
Chicago/Turabian StyleDi Chen; Dekai Li; Jingguang Peng; Taolei Wang; Biao Yan; Wei Lu. 2017. "The Effect of Rolling Temperature on the Microstructure and Mechanical Properties of Surface-Densified Powder Metallurgy Fe-Based Gears Prepared by the Surface Rolling Process." Metals 7, no. 10: 420.
Powder metallurgy (PM) components are widely used in the auto industry due to the advantage of net-shape forming, low cost, and high efficiency. Still, usage of PM components is limited in the auto industry when encountering rigorous situations, like heavy load, due to lower strength, hardness, wear resistance, and other properties compared to wrought components due to the existence of massive pores in the PM components. In this study, through combining the powder metallurgy process and rolling process, the pores in the PM components were decreased and a homogenous densified layer was formed on the surface, which resulted in the enhancement of the strength, hardness, wear resistance, and other properties, which can expand its range of application. In this paper, we study the impact of different rolling feeds on the performance of the components’ surfaces. We found that with the increase of the rolling feed, the depth of the densified layer increased.
Jingguang Peng; Yan Zhao; Di Chen; Kiade Li; Wei Lu; Biao Yan. Effect of Surface Densification on the Microstructure and Mechanical Properties of Powder Metallurgical Gears by Using a Surface Rolling Process. Materials 2016, 9, 846 .
AMA StyleJingguang Peng, Yan Zhao, Di Chen, Kiade Li, Wei Lu, Biao Yan. Effect of Surface Densification on the Microstructure and Mechanical Properties of Powder Metallurgical Gears by Using a Surface Rolling Process. Materials. 2016; 9 (10):846.
Chicago/Turabian StyleJingguang Peng; Yan Zhao; Di Chen; Kiade Li; Wei Lu; Biao Yan. 2016. "Effect of Surface Densification on the Microstructure and Mechanical Properties of Powder Metallurgical Gears by Using a Surface Rolling Process." Materials 9, no. 10: 846.
Two different kinds of Au–Ni–TiO2 nano-composite coatings were electrodeposited by powder enhanced method and sol-enhanced technology. A comparative study on the mechanical properties and microstructure of Au–Ni–TiO2 coatings was conducted. Due to the high surface energy of nano-particles, agglomeration of TiO2 powders can be seen clearly in the solid particle enhanced Au–Ni–TiO2 coating. Correspondingly, TiO2 nano-particles with a size ranging from 3–12 nm were highly dispersed in the sol-enhanced Au–Ni–TiO2 coating matrix, resulting in a significant improvement of nano-hardness.
Yuxin Wang; Ying Ju; Shanghai Wei; Wei Lu; Biao Yan; Wei Gao. Mechanical properties and microstructure of Au–Ni–TiO2 nano-composite coatings. Materials Characterization 2015, 102, 189 -194.
AMA StyleYuxin Wang, Ying Ju, Shanghai Wei, Wei Lu, Biao Yan, Wei Gao. Mechanical properties and microstructure of Au–Ni–TiO2 nano-composite coatings. Materials Characterization. 2015; 102 ():189-194.
Chicago/Turabian StyleYuxin Wang; Ying Ju; Shanghai Wei; Wei Lu; Biao Yan; Wei Gao. 2015. "Mechanical properties and microstructure of Au–Ni–TiO2 nano-composite coatings." Materials Characterization 102, no. : 189-194.
The detection of cancer cells in clinical samples is of great interest for a range of diagnostic applications, and separation and enrichment of cancer cells in low concentrations from complex sample matrices is necessary for efficient cancer diagnostics. In the present study, new surface-modified iron oxide nanoparticles were synthesized for the separation of lung cancer cells by simple precipitation of Fe(II) and Fe(III) salts in an aqueous ammonia solution, followed by the addition of polyethylenimine (PEI). The modified nanoparticles were characterized by X-ray diffractometry (XRD), transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS) and vibrating sample magnetometry (VSM). XRD and TEM revealed that the particles were ~10 nm in diameter, while FTIR and XPS showed that their surfaces were well coated with PEI. VSM results confirmed the superparamagnetic nature of PEI-coated Fe3O4 nanoparticles. The separation and enrichment of lung cancer cells from sputum samples was demonstrated using the synthesized developed PEI-coated Fe3O4 magnetic nanoparticles. Exfoliative cytopathology showed that the percentage of positive cells increased from 6.3% (38/600) in untreated sputum samples to 38.5% (231/600) in sputum samples treated with PEI-coated Fe3O4 magnetic nanocomposites. This finding indicated that PEI-coated Fe3O4 magnetic nanocomposites can be used to efficiently enrich lung cancer cells from sputum for subsequent cytopathological analysis.
Wei Lu; Min Ling; Min Jia; Ping Huang; Chengkui Li; Biao Yan. Facile synthesis and characterization of polyethylenimine-coated Fe3O4 superparamagnetic nanoparticles for cancer cell separation. Molecular Medicine Reports 2014, 9, 1080 -1084.
AMA StyleWei Lu, Min Ling, Min Jia, Ping Huang, Chengkui Li, Biao Yan. Facile synthesis and characterization of polyethylenimine-coated Fe3O4 superparamagnetic nanoparticles for cancer cell separation. Molecular Medicine Reports. 2014; 9 (3):1080-1084.
Chicago/Turabian StyleWei Lu; Min Ling; Min Jia; Ping Huang; Chengkui Li; Biao Yan. 2014. "Facile synthesis and characterization of polyethylenimine-coated Fe3O4 superparamagnetic nanoparticles for cancer cell separation." Molecular Medicine Reports 9, no. 3: 1080-1084.
Magnesium and its alloys—a new class of degradable metallic biomaterials—are being increasingly investigated as a promising alternative for medical implant and device applications due to their advantageous mechanical and biological properties. However, the high corrosion rate in physiological environments prevents the clinical application of Mg-based materials. Therefore, the objective of this study was to develop a hydroxyapatite (HA) coating on ZK60 magnesium alloy substrates to mediate the rapid degradation of Mg while improving its cytocompatibility for orthopedic applications. A simple chemical conversion process was applied to prepare HA coating on ZK60 magnesium alloy. Surface morphology, elemental compositions, and crystal structures were characterized using scanning electron microscopy, energy dispersive spectroscopy, and X-ray diffraction, respectively. The corrosion properties of samples were investigated by immersion test and electrochemical test. Murine fibroblast L-929 cells were harvested and cultured with coated and non-coated ZK60 samples to determine cytocompatibility. The degradation results suggested that the HA coatings decreased the degradation of ZK60 alloy. No significant deterioration in compression strength was observed for all the uncoated and coated samples after 2 and 4 weeks’ immersion in simulated body fluid (SBF). Cytotoxicity test indicated that the coatings, especially HA coating, improved cytocompatibility of ZK60 alloy for L929 cells.
Bing Wang; Ping Huang; Caiwen Ou; Kaikai Li; Biao Yan; Wei Lu. In Vitro Corrosion and Cytocompatibility of ZK60 Magnesium Alloy Coated with Hydroxyapatite by a Simple Chemical Conversion Process for Orthopedic Applications. International Journal of Molecular Sciences 2013, 14, 23614 -23628.
AMA StyleBing Wang, Ping Huang, Caiwen Ou, Kaikai Li, Biao Yan, Wei Lu. In Vitro Corrosion and Cytocompatibility of ZK60 Magnesium Alloy Coated with Hydroxyapatite by a Simple Chemical Conversion Process for Orthopedic Applications. International Journal of Molecular Sciences. 2013; 14 (12):23614-23628.
Chicago/Turabian StyleBing Wang; Ping Huang; Caiwen Ou; Kaikai Li; Biao Yan; Wei Lu. 2013. "In Vitro Corrosion and Cytocompatibility of ZK60 Magnesium Alloy Coated with Hydroxyapatite by a Simple Chemical Conversion Process for Orthopedic Applications." International Journal of Molecular Sciences 14, no. 12: 23614-23628.
Wei Lu; Ping Huang; Zhe Chen; Chenchong He; Yuxin Wang; Biao Yan. Magnetization studies of first-order magnetostructural phase transition in polycrystalline FeRh thin films. Journal of Physics D: Applied Physics 2012, 45, 1 .
AMA StyleWei Lu, Ping Huang, Zhe Chen, Chenchong He, Yuxin Wang, Biao Yan. Magnetization studies of first-order magnetostructural phase transition in polycrystalline FeRh thin films. Journal of Physics D: Applied Physics. 2012; 45 (43):1.
Chicago/Turabian StyleWei Lu; Ping Huang; Zhe Chen; Chenchong He; Yuxin Wang; Biao Yan. 2012. "Magnetization studies of first-order magnetostructural phase transition in polycrystalline FeRh thin films." Journal of Physics D: Applied Physics 45, no. 43: 1.
This identifier is not currently attached to any content. Of course, DOIs can’t actually ever be deleted (they’re persistent!), but sometimes our members create DOIs in error. We do have a process to approximate deletion which we follow only in rare cases where: a) the DOI has been genuinely created in error; and most crucially, if the DOI has never been published anywhere online or in print and never otherwise distributed to or communicated with anyone (authors, readers, reviewers, etc.
Wei Lu; Biao Yan. Bulk Amorphous and/or Nanocrystalline Finemet Alloy Prepared by Super-High-Pressure Consolidation. Materials Science Forum 2007, 1297 -1300.
AMA StyleWei Lu, Biao Yan. Bulk Amorphous and/or Nanocrystalline Finemet Alloy Prepared by Super-High-Pressure Consolidation. Materials Science Forum. 2007; ():1297-1300.
Chicago/Turabian StyleWei Lu; Biao Yan. 2007. "Bulk Amorphous and/or Nanocrystalline Finemet Alloy Prepared by Super-High-Pressure Consolidation." Materials Science Forum , no. : 1297-1300.
This identifier is not currently attached to any content. Of course, DOIs can’t actually ever be deleted (they’re persistent!), but sometimes our members create DOIs in error. We do have a process to approximate deletion which we follow only in rare cases where: a) the DOI has been genuinely created in error; and most crucially, if the DOI has never been published anywhere online or in print and never otherwise distributed to or communicated with anyone (authors, readers, reviewers, etc.
Hai Yi Lou; Wei Lu; Lei Yang; Biao Yan. Microstructure and Properties of Zn61Al34M5 Alloy Produced by Rapid Solidification and Warm-Compacting Sintering Process. Materials Science Forum 2007, 829 -832.
AMA StyleHai Yi Lou, Wei Lu, Lei Yang, Biao Yan. Microstructure and Properties of Zn61Al34M5 Alloy Produced by Rapid Solidification and Warm-Compacting Sintering Process. Materials Science Forum. 2007; ():829-832.
Chicago/Turabian StyleHai Yi Lou; Wei Lu; Lei Yang; Biao Yan. 2007. "Microstructure and Properties of Zn61Al34M5 Alloy Produced by Rapid Solidification and Warm-Compacting Sintering Process." Materials Science Forum , no. : 829-832.
Microstructure and soft magnetic properties of bulk amorphous and/or nanocrystalline Fe73.5Cu1Nb3Si13.5B9(Finemet) alloys prepared by consolidation at a ultra-high pressure (5.5GPa) were investigated in this paper. The relative density of the bulk sample 1 (from amorphous powders) was 98.5% and the grain sizes were about 10.6nm. While the relative density and grain sizes of bulk sample 2 (from nanocrystalline powders) are 98% and 20.1nm, respectively. Particularly, the bulk samples exhibited a good combined magnetic property: for Sample1, Ms=125emu/g and Hc=1.5Oe; for Sample2, Ms=129emu/g and Hc=3.3Oe. The success of synthesizing the nanocrystalline Fe-based bulk alloys will be encouraging for the future development of bulk nanocrystalline soft magnetic alloys.
Wei Lu; Biao Yan. Bulk Amorphous and/or Nanocrystalline Finemet Alloy Prepared by Super-High-Pressure Consolidation. Materials Science Forum 2007, 534-536, 1297 -1300.
AMA StyleWei Lu, Biao Yan. Bulk Amorphous and/or Nanocrystalline Finemet Alloy Prepared by Super-High-Pressure Consolidation. Materials Science Forum. 2007; 534-536 ():1297-1300.
Chicago/Turabian StyleWei Lu; Biao Yan. 2007. "Bulk Amorphous and/or Nanocrystalline Finemet Alloy Prepared by Super-High-Pressure Consolidation." Materials Science Forum 534-536, no. : 1297-1300.
Microstructure and mechanical properties of a newly developed Zn61Al34M5 (M=Cu, Si, RE, et al.) alloy obtained by warm-compacting sintering technique were studied using optical microscopy (OM), scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS), X-ray diffraction (XRD) and differential scanning calorimetry (DSC) associated with measurements of mechanical properties. The results showed that the new alloy consisted of α-phase and η-phase and have good plasticity; its hardness increased by 10%~20% and density decreased by about 16% as compared with those of the traditional cast Zn-Al alloys.
Hai Yi Lou; Wei Lu; Lei Yang; Biao Yan. Microstructure and Properties of Zn61Al34M5 Alloy Produced by Rapid Solidification and Warm-Compacting Sintering Process. Materials Science Forum 2007, 534-536, 829 -832.
AMA StyleHai Yi Lou, Wei Lu, Lei Yang, Biao Yan. Microstructure and Properties of Zn61Al34M5 Alloy Produced by Rapid Solidification and Warm-Compacting Sintering Process. Materials Science Forum. 2007; 534-536 ():829-832.
Chicago/Turabian StyleHai Yi Lou; Wei Lu; Lei Yang; Biao Yan. 2007. "Microstructure and Properties of Zn61Al34M5 Alloy Produced by Rapid Solidification and Warm-Compacting Sintering Process." Materials Science Forum 534-536, no. : 829-832.