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| 1 | Effect of heat treatment on mechanical properties of heavily cold-rolled Fe-6.5wt%Si alloy sheet显示文摘Fe-6.5wt%Si alloy has excellent soft magnetic properties,but it is hard to be cold-rolled due to appearance of ordered phases in this alloy.In this paper we report that ultra thin Fe-6.5wt%Si sheet of 0.05 mm thick was obtained by heavily cold rolling.By means of optical microscope,micro-hardness indenter,instron,SEM and X-ray diffraction,the effect of heat treatment on mechanical properties of this alloy sheet was investigated.The heavily cold-rolled sheet exhibits some extent of ductility.The ultimate tensile strength reaches 1.93 GPa.After heat treatment,micro-hardness is decreased and the ductility is lost,especially at temperature above 650℃ when recrystallization takes place.The reason for decreasing the ductility lies in the ordered DO3 phase transformation. | LIANG YongFeng,YE Feng,LIN JunPin,WANG YanLi,ZHANG LaiQi & CHEN GuoLiang State Key Laboratory for Advanced Metals and Materials,University of Science and Technology Beijing,Beijing 100083,China | 2010 | Science China(Technological Sciences)2010，53，4： | 10 |
| 2 | Dynamic recrystallization during hot torsion of Al-4Mg alloy显示文摘Binary Al-4Mg alloy have been deformed by hot torsion at 300-500℃ and strain rates of 0,006-1.587 s-1 to a true strainof 5.5. The specimens were annealed in vacuum for 1.5 h at 500℃ and then water quenched. The study indicates that the dynamicrecrystallization occurs during hot torsion of Al-4Mg alloy in a certain range of Z parameter (Zener-Hollmon Parameter), i.e. 19.3 ≤lnZ ≤ 24.8. Increasing the strain rate at higher deformation temperature or reducing the strain rate at lower deformation temperatureaccelerates the occurrence of dynamic recrystallization in the alloy. | Junpin Lin, Yanli Wang, Zhi Lin, and Guoliang ChenState Key Laboratory of Advanced Metal Materials, University of Science and Technology Beijing, Beijing 100083, China | 2003 | Journal of University of Science and Technology Beijing2003，10，2： | 6 |
| 3 | Role of yttrium in glass formation of Ti-based bulk metallic glasses显示文摘Starting with Zr of two different purities, Ti-based bulk metallic glasses (BMGs) with a nominal composition of Ti40Zr25Cu12Ni3Be20 were prepared. The effect of the addition of yttrium at levels of 0.2 at.%, 0.4 at.%, 0.5 at.%, 0.6 at.%, and 1 at.% on the glass forming ability (GFA) of the alloy has been investigated by means of metallography, X-ray diffraction, and differential scanning calorimetry. Experimental data in-dicates that high impurity content dramatically reduces the glass forming ability. Microalloying with 0.5 at.% Y is effective in suppressing the crystalline phase formation and alleviating the detrimental effect of oxygen in the low-purity alloy. On the contrary, in the alloy contain-ing high-purity element, the effective yttrium addition is less than 0.4 at.%. The results indicate that the beneficial effect of the optimum dopants is mainly due to scavenging the oxygen impurity via the formation of innocuous phase. | HAO Guojian REN Fei ZHANG Yong LIN Junpin | 2009 | Rare Metals2009，28，1： | 4 |
| 4 | Directional solidification of Ti-45Al-8Nb-(W,B,Y) alloy显示文摘Using a Bridgman vertical vacuum furnace,Ti-45Al-8Nb-(W,B,Y) (at.%) bars,which were prepared from a plasma arc melting (PAM) ingot,were directionally solidified at growth rates of 10,15,and 20 μm/s.Polysynthetic twinned (PST) crystal with an aligned lamellar microstructure was obtained at the growth rate of 15 μm/s because of high Nb addition.The principle of PST crystal growth and the effect of Nb element were discussed.The results of investigations on microstructure and micromechanical properties of the directionally solidified (DS) bars of Ti-45Al-8Nb-(W,B,Y) alloy are briefly summarized. | DING Xianfei LIN Junpin HE Jianping YE Feng CHEN Guoliang | 2010 | Rare Metals2010，29，3： | 4 |
| 5 | Homogenization treatment of high Nb containing TiAl alloys with as-cast and as-forged microstructures显示文摘包含 TiAl 合金的高 Nb 的微观结构进化上的热处理的效果被学习了。结果显示在当演员组和同样伪造的合金的那 -segregation, 分离和 S 分离能有效地在 T 上面在温度被消除(1350-1400 癯牥吗? | XU Zhengfang XU Xiangjun LIN Junpin ZHANG Yong WANG Yanli LIN Zhi CHEN Guoliang | 2008 | Rare Metals2008，27，2： | 4 |
| 6 | Strain rate sensitivity of tensile properties in high Nb containing TiAl alloys显示文摘The effect of strain rate on the yield strength of high Nb containing TiAl alloy was studied. The results show that the strain rate sensitivity varies with the test temperature, and the yield strength is not sensitive to the strain rate at room temperature but sig- nificantly sensitive to the strain rate at high temperature. An increase of the strain rate or a decrease of the temperature results in an obvious change of fracture mode. It is found that the strain rate sensitivity of this alloy varying with temperature is due to the dislo- cation climb generated at high temperature. | Jianfeng Gao Xiangjun Xu Junpin Lin Xiping Song Yanli Wang Guoliang Chen | 2005 | Journal of University of Science and Technology Beijing2005，12，6： | 2 |
| 7 | Diffusion behavior of Nb element in high Nb containing TiAl Alloys by reactive hot pressing显示文摘Diffusion behavior of Nb in elemental powder metallurgy high Nb containing TiAl alloys was investigated. The results show that Nb element dissolves into the matrix by diffusion. Pore nests are formed in situ after Nb diffusion. With the increase in hot pressing temperature, the diffusion of Nb will be more sufficient, and the microstructure is more homo-geneous. Nb element diffuses completely at 1400°C. Meanwhile, compression deformation and agglomeration phenomena of pores are observed in some pore nests. Hot isostatic pressing (HIP) treatment can only efficiently decrease but not eliminate porosity completely. | WANG Yanhang LIN Junpin HE Yuehui WANG Yanli CHEN Guoliang | 2006 | Rare Metals2006，25，4： | 2 |
| 8 | Improvement in the liquid zinc corrosion resistance of high Nb-TiAl alloys by pre-oxidation in a SiO_2-powder pack显示文摘The influence of pre-oxidation on the liquid zinc corrosion resistance of high Nb-TiAl alloys was investigated.The pre-oxidation was performed by heating the specimens,buried in silica powder and encapsulated in a silica tube under a vacuum of 1.3×10-3 Pa at 950°C for 12 h.Experimental results showed that the preoxidized sample exhibited much higher liquid zinc corrosion resistance than that for the comparative samples.This excellent liquid zinc corrosion resistance was attributed to the formation of high-quality oxide scale during peroxidation.The corrosion of all the samples in liquid zinc was caused by a localized breakdown in the oxide scales.The continuous and dense oxide scale formed during preoxidation substantially may prevent the liquid zinc from diffusing to the substrate,and its good continuity may also reduce the possibility of localized breakdown in the oxide scale. | SUN PengFei ZHANG LaiQi ZHANG Li LIN JunPin | 2012 | Science China(Technological Sciences)2012，55，2： | 2 |
| 9 | A new microfiltration membrane with three-dimensional reticular architecture for Nano-pollutants removal from wastewater显示文摘This research provides a new insight into designing next-generation filtration materials for Nano-pollutants removal from wastewater,and potentially for gas/solid or liquid/solid separation in corrosive environment.Considering the high corrosion and oxidation resistance,Ti-40Al-10Nb-10Cr porous alloy was prepared by powder metallurgy and used as a mechanical support with a pore size of around 10 pm.Subsequently,metallic Zn nanoparticles was coated on the Ti-40Al-10Nb-10Cr porous framework by means of chemical vapor deposition,obtaining a novel microfiltration membrane with three-dimensional reticular architecture.Furthermore,the influence of Zn coating on surface morphology,pore feature,and filtration capability of Ti-40AI-10Nb-10Cr porous alloy was investigated.It is of note that the as-prepared microfiltration membrane exhibits an excellent Nanopollutants filtration efficiency of greater than 99.989%from wastewater.Most importantly,such a three-dimensional reticular architecture provides excellent structural stability,allowing the reutilization of the microfiltration membrane for at least 200 filtration cycles of wastewater treatment. | Wanyuan Gui Jingru Liu Xiping Song Hui Zhang Junpin Lin Benli Luan | 2021 | Progress in Natural Science:Materials International2021，31，3： | 1 |
| 10 | The corrosion of Fe3Al alloy in liquid zinc 显示文摘 | Wang Wenjun Lin Junpin Wang Yanli et ol | 2007 | Corrosion Science2007，49，： | 1 |
| 11 | Surface modification of Ti-45Al-8.5 Nb alloys by microarc oxidation to improve high-temperature oxidation resistance显示文摘Microarc oxidation(MAO)electrolysis plasma deposition was used to prepare Al_2O_3coatings on Ti-45Al-8.5 Nb alloys to improve high temperature oxidation resistance.The surface and cross-section morphologies before and after high-temperature oxidation,the chemical composition,and the phase identification of the coatings were investigated by scanning electron microscopy(SEM),electron probe microanalyses(EPMA),and X-ray diffraction(XRD).The results show that Al_2O_3coatings with a thickness of approximately 8μm can be obtained on the Ti-45Al-8.5 Nb alloys by MAO for 600 s.The samples with the Al_2O_3coatings exhibited better high-temperature oxidation resistance.A minimal weight gain of only 0.396 g/m^2after 100 h oxidation at 900°C was observed for the coatings formed with a deposition voltage of 400 V and using a duty cycle of 3%.The deposition mechanism of the Al_2O_3coatings and the effect of the MAO parameters are also described. | Fang Cheng Shasha Li Wanyuan Gui Junpin Lin | 2018 | Progress in Natural Science:Materials International2018，28，3： | 1 |
| 12 | Effect of a magnetron sputtered (Al 2 O 3 –Y 2 O 3 )/(Pt–Au) laminated coating on hot corrosion resistance of 8Nb–TiAl alloy显示文摘 | Xiaoxu Ma Yedong He Junpin Lin Deren Wang Jin Zhang | 2011 | Surface & Coatings Technology2011，，10： | 1 |
| 13 | Effects of heat treatment on microstructure of directionally solidified Ti-45A1-8Nb-(W,B,Y) alloy显示文摘 | Ding Xianfei Lin Junpin Zhang Naiqi | 2011 | Trans Nonferrous Metals Soc China2011，21，： | 1 |
| 14 | On the reversibility of the α_(2)/ω_(o) phase transformation in a high Nb containing TiAl alloy during high temperature deformation显示文摘The transformations between the phasesα_(2)(Ti_(3)Al)andω_(o)were investigated in a lamellar multiphase titanium aluminide alloy based onγ(TiAl).The paper complements an earlier investigation performed on the same material in which the importance of deformation-induced twin structures for theα_(2)→ω_(o) transformation was demonstrated.The present study shows that the reverse transformationω_(o)→α_(2) can also occur during high-temperature deformation.The transformation is probably triggered by constraint stresses,which exist between the different constituents due to the crystalline mismatch.The combined operation of mechanical twinning of theα_(2) phase and the reversible transformation fully converts theα_(2) lamellae into a mixture ofα_(2) andω_(o).This conversion greatly reduces the mechanical anisotropy existing in formerα_(2) lamellae.Regarding the technical use of the alloy,the stability of the converted structure with respect to further annealing was also examined.The reported processes occur at the nano-meter and sub nano-meter scale,thus,advanced characterization techniques were applied,such as high-resolution transmission electron microscopy(HRTEM)and atom probe tomography(APT). | Lin Song Fritz Appel Andreas Stark Uwe Lorenz Junyang He Zhanbing He Junpin Lin Tiebang Zhang Florian Pyczak | 2021 | Journal of Materials Science & Technology2021，，34： | 1 |
| 15 | Determination of stacking fault energies in a high-Nb TiAl alloy at 298 K and 1273 K显示文摘The stacking fault energies of Ti-46Al-8.5Nb-0.2W alloy at 298 K and 1273 K were determined. The principle for the determination of the stacking fault energies is based on the fact that the stacking fault energy and the elastic interaction energy acting on the dissociated partial dislocations are equal. After the compress deformations with the strain of 0.2% at 298 K and 1273 K, and water quench to maintain the dislocation structures deformed at 1273 K, the dissociation distances between two partial dislocations were determined by weak beam transmission electron microscopy (WBTEM) technique. Based on these dissociation distances and the corresponding calculation method, the stacking fault energies were determined to be 77-81 mJ/m2 at 298 K and to be 57-60mJ/m2 at 1273 K respectively. | SONG Xiping, CAO Lin, WANG Yanli, LIN Junpin, and CHEN Guoliang | 2004 | Rare Metals2004，23，1： | 1 |
| 16 | Investigation of the microcrack evolution in a Ti-based bulk metallic glass matrix composite显示文摘The initiation and evolution behavior of the shear-bands and microcracks in a Ti-based metallic-glass–matrix composite(MGMC) were investigated by using an in-situ tensile test under transmission electron microscopy(TEM). It was found that the plastic deformation of the Ti-based MGMC related with the generation of the plastic deformation zone in crystalline and shear deformation zone in glass phase near the crack tip. The dendrites can suppress the propagation of the shear band effectively. Before the rapid propagation of cracks, the extending of plastic deformation zone and shear deformation zone ahead of crack tip is the main pattern in the composite. | Yongsheng Wang Zhenxi Guo Rui Ma Guojian Hao Yong Zhang Junpin Lin Manling Sui | 2014 | Progress in Natural Science:Materials International2014，24，2： | 1 |
| 17 | Microstructure development during directional solidification of Ti-45A1-8Nb alloy 显示文摘 | Ding Xiaofei Lin Junpin Chen Guoliang | 2010 | Journal of Alloys and Compounds2010，506，： | 1 |
| 18 | Microstructures and mechanical properties of directionally solidified Ti-45A1-8Nb- (W, B, Y) alloys 显示文摘 | Ding Xiaofei Lin Junpin Chen Guoliang | 2011 | Materials and Design2011，32，： | 1 |
| 19 | ω_o phase precipitation in annealed high Nb containing TiAl alloys显示文摘The ordered ω phases in high Nb containing Ti Al(Nb-Ti Al) alloys have been garnering increasing attention in the recent years. However, the investigations on the Nb dependence on the ωoprecipitation are scarce. In this study, the effect of Nb content on the ωoprecipitation in high Nb(6–10 at%) containing Ti Al alloys after long-time annealing at 850 1C has been studied. The results show that small ordered ω particles in the retained βophase cannot be discerned under scanning electron microscope(SEM) but can be observed using transmission electron microscopy(TEM). Although the Nb segregation can be eliminated after the homogenization heat treatment, the ωophase precipitated in all the alloys studied after annealing at 850 1C. TEM examination reveals that the orientation relationship between the ωoand α2phases can be derived as: [0001]ωo//[1120]α2;(1120)ωo//(0001)α2, which indicates that the ωophase is directly transformed from the parent α2phase. Small γ particles are also observed within the ωoareas. The α2-ωot γ decomposition process is expected during annealing. It is concluded that ωophase is an equilibrium phase in high Nb-Ti Al alloys at 850 1C. | Lin Song Cong Peng Xiangjun Xu Li You Yanli Wang Junpin Lin | 2015 | Progress in Natural Science:Materials International2015，25，2： | 1 |
| 20 | Densification behavior of high Nb containing TiAl alloys through reactive hot pressing显示文摘Densification behavior of high Nb containing TiAl alloys through reactive hot pressing was investigated. The results showed that the density of the sample hot pressed at 1400°C could reach a near full density of 98.37%. However, the densification abnormality was observed at 1500°C. The diffusion of elemental Nb during microstructural evolution is an important aspect affecting densification, which will form pore nests. With the increase of hot pressing temperature, the diffusion of Nb becomes more adequate. HIP (Hot isostatic pressing) treatment can only decrease porosity to some extent, but cannot eliminate it completely. | Yanhang Wang Junpin Lin Yuehui He Yanli Wang Guoliang Chen | 2007 | Journal of University of Science and Technology Beijing2007，14，3： | 0 |
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