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| 1 | Microstructure and tensile properties of low cost titanium alloys at different cooling rate显示文摘Titanium and titanium alloys have several advantages, but the cost of titanium alloys is very expensive compared with the traditional metal materials. This article introduces two new low-cost titanium alloys Ti-2.1Cr-1.3Fe (TCF alloy) and Ti-3Al-2.1Cr-1.3Fe (TACF alloy). In this study, we used Cr-Fe master alloy as one of the raw materials to develop the two new alloys. We introduce the microstructure and tensile properties of the two new alloys from β solution treated with different cooling methods. Optical microscopy (OM), X-ray diffractometry (XRD), and transmission electron microscopy (TEM) were employed to analyze the phase constitution, and scanning electron microscopy (SEM) was used to observe the fracture surfaces. The results indicate that the microstructures consist of β grain boundary and α′ martensite after water quenching (WQ), β matrix and α phase after air cooling (AC) and furnace cooling (FC), respectively. Also, the microstructure is the typical basketweave structures after FC. Of course, athermal ω is also observed by TEM after WQ. The strength increases with decreasing cooling rates and the plasticity is reversed. Because of the athermal ω, the strength and ductility are highest and lowest when the cooling method is WQ. The strength of TACF alloy is higher than the TCF alloy, but the plasticity is lower. The fracture surfaces are almost entirely covered with dimples under the cooling methods of AC and FC. Also, we observe an intergranular fracture area that is generated by athermal ω, although some dimples are observed after WQ. | Wang Guo Hui Songxiao Ye Wenjun Mi Xujun Wang Yongling Zhang Wenjing | 2012 | Rare Metals2012，31，6： | 8 |
| 2 | Martensitic transformation of Ti-18Nb(at.%) alloy with zirconium显示文摘The addition of 3%~9% Zr on the martensitic transformation of Ti-18Nb(at.%) alloy was investigated. The results of microstructure and X-ray diffraction (XRD) analysis show that the phase constitution of as-quenched Ti-18Nb-9Zr(at.%) alloy consists of the retained matrix and martensite, while that of the other three alloys is single martensite. No trace of athermal phase was found in any of the as-quenched alloys. Unlike the effect of Nb addition on the martensitic transformation start temperature Ms of Ti-18Nb(at.%) alloy, Ms de-creased nonlinearly as increasing the Zr addition from 3% to 9% and Ms decreased much more sharply as increasing the Zr addition. The Ms of as-quenched Ti-18Nb-9Zr alloy was around room temperature. The effect of Zr addition on the phase stabilizing in the Ti-18Nb(at.%) alloy was briefly discussed. | Ye, Wenjun Mi, Xujun Song, Xiaoyun | 2012 | Rare Metals2012，31，3： | 4 |
| 3 | Application of visible_near infrared spectroscopy and chemometric calibrations for variety discrimination of instant milk teas显示文摘 | LIU Fei YE Xujun HE Yong | 2009 | Journal of Food Engineering2009，93，： | 1 |
| 4 | Application of visi- ble-near infrared spectroscopy and chemometric calibra- tions for variety discrimination of instant milk teas 显示文摘 | Liu Fei Ye Xujun He Yong | 2009 | Journal of Food Engineering2009，93，： | 1 |
| 5 | The rice ERF transcription factor OsERF922 negatively regulates resistance to Magnaporthe oryzae and salt tolerance显示文摘 | Dongfeng Liu Xujun Chen Jiqin Liu Jianchun Ye Zejian Guo | 2012 | Journal of Experimental Botany2012，，10： | 1 |
| 6 | P2 asymmetry of Au's M-band flux and its smoothing effect due to high-Z ablator dopants显示文摘X-ray drive asymmetry is one of the main seeds of low-mode implosion asymmetry that blocks further improvement of the nuclear per-formance of“high-foot”experiments on the National Ignition Facility[Miller et al.,Nucl.Fusion 44,S228(2004)].More particularly,the P2 asymmetry of Au's M-band flux can also severely influence the implosion performance of ignition capsules[Li et al.,Phys.Plasmas 23,072705(2016)].Here we study the smoothing effect of mid-and/or high-Z dopants in ablator on Au's M-band flux asymmetries,by modeling and comparing the implosion processes of a Ge-doped ignition capsule and a Si-doped one driven by X-ray sources with P2 M-band flux asymmetry.As the results,(1)mid-or high-Z dopants absorb hard X-rays(M-band flux)and re-emit isotropically,which helps to smooth the asymmetric M-band flux arriving at the ablation front,therefore reducing the P2 asymmetries of the imploding shell and hot spot;(2)the smoothing effect of Ge-dopant is more remarkable than Si-dopant because its opacity in Au's M-band is higher than the latter's;and(3)placing the doped layer at a larger radius in ablator is more efficient.Applying this effect may not be a main measure to reduce the low-mode implosion asymmetry,but might be of significance in some critical situations such as inertial confinement fusion(ICF)experiments very near the performance cliffs of asymmetric X-ray drives. | Yongsheng Li Chuanlei Zhai Guoli Ren Jianfa Gu Wenyi Huo Xujun Meng Wenhua Ye Ke Lan Weiyan Zhang | 2017 | Matter and Radiation at Extremes2017，2，2： | 1 |
| 7 | A groundbased hyperspectral imaging system for characterizing vegetationspectral features 显示文摘 | Xujun Ye Kenshi Sakai Hiroshi Okamoto | 2008 | Computers and Electronics in Agriculture2008，63，： | 1 |
| 8 | Estimation of Citrus yield from airborne hyperspectral images using a Neural Network Model显示文摘 | Xujun Ye Kenshi Sakai Leroy Ortega Garciano | 2006 | Ecological Modelling2006，198，： | 1 |
| 9 | Applieation of visible/near infrared spectroscopy and chemometric calibrations for variety discrimination of instant milk teas显示文摘 | Liu Fei Ye Xujun He Yong | | 0，，02： | 1 |
| 10 | Study on dynamic fracture behavior of TA15ELI alloy under mode-Ⅱ loading by caustics method显示文摘The dynamic fracture behavior of TA15ELI alloy with lath-like microstructure was studied by caustics method.Specimens with double-side pre-notch were tested under the plane-stress condition at mode-Ⅱ loading with a drop hammer system.Caustics information recorded in films illustrated the histories of both crack length and stress intensity factor.The dynamic fracture toughness and crack growth velocity of TA15ELI with lath-like microstructure were determined to be 279 MPa·m1/2 and 32.6 m/s,respectively.SEM fractograph analysis showed a mixed feature of mainly plastic mode for TA15ELI alloy in dynamic mode-Ⅱ fracture.Shear localization was observed in the vicinity of the crack initiation area. | LIU Rui,HUI Songxiao,YE Wenjun,MI Xujun,XIONG Baiqing,and YOU Zhenping State Key Laboratory for Fabrication & Processing of Nonferrous Metals,General Research Institute for Nonferrous Metals,Beijing 100088,China | 2010 | Rare Metals2010，29，4： | 0 |
| 11 | Ergothioneine and its congeners:anti-ageing mechanisms and pharmacophore显示文摘Ergothioneine,Ovothiol,and Selenoneine are sulfur/selenium-containing histidine-derived natural products widely distributed across different organisms.They exhibit significant antioxidant properties,making them as potential lead compounds for promoting health.Increasing evidence suggests that Ergothioneine is positively correlated with healthy ageing and longevity.The mechanisms underlying Ergothioneine's regulation of the ageing process at cellular and molecular levels are beginning to be understood.In this review,we provide an in-depth and extensive coverage of the anti-ageing studies on Ergothioneine and discuss its possible intracellular targeting pathways.In addition,we highlight the recent efforts in elucidating the biosynthetic details for Ergothioneine,Ovothiol,and Selenoneine,with a particular focus on the study of their pharmacophore-forming enzymology. | Li Chen Liping Zhang Xujun Ye Zixin Deng Changming Zhao | 2024 | Protein & Cell2024，15，3： | 0 |
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