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| 1 | Comparison of microstructures and mechanical properties of composite extruded AZ31 sheets显示文摘The microstructures and mechanical properties of the composite extruded AZ31/AZ31 and AZ31/4047 Al sheets were investigated and made a comparison to the conventional extruded AZ31 sheet.Owing to the introduced intense shear deformation at the interface during the composite extrusion,grain refinement and tilted texture were detected in AZ31 layers of the AZ31/AZ31 and AZ31/4047 Al sheets,while the conventional extruded AZ31 sheet exhibited a relative coarse,inhomogeneous microstructure and strong basal texture.The compressiontension yield ratio was increased gradually from the AZ31 to the AZ31/AZ31 and AZ31/4047 Al sheets.Besides,the AZ31/4047 Al sheet could successfully accomplish the whole bending forming process at room temperature,while the AZ31 and AZ31/AZ31 sheets were both bend-formed to failure with significant cracks in the outer tensile region under the identical bending parameters.Moreover,under the same bending strain,both the outward offset degree of strain neutral layer and the sheet thickening were more serious in the AZ31/4047 Al composite sheet than those of the AZ31 and AZ31/AZ31 sheets.The foremost reason was the quite wide gap of material properties between Mg alloy AZ31 layer(tensile loading in the outer region)and Al 4047 layer(compressive loading in the inner region). | Yanfu Chai Yan Song Bin Jiang Jie Fu Zhongtao Jiang Qingshan Yang Haoran Sheng Guangsheng Huang Dingfei Zhang Fusheng Pan | 2019 | Journal of Magnesium and Alloys2019，7，4： | 11 |
| 2 | Analysis of the cracks formation on surface of extruded magnesium rod based on numerical modeling and experimental verification显示文摘To reduce the surface cracks of extrusion rod for AZ31 magnesium caused by nonho-mogeneous metal flow in extrusion process, 3D computer finite element (FE) simulations of extruding a wrought magnesium alloy AZ31 into rods have been performed and the results have been verified in extrusion experiments under identical conditions. The tendency to generate the dead zone is decreased by employing the die angle 60° at the cone-shaped die comparing with the die angle 180°. The surface additional tensile stresses of the rod at the die exit are decreased greatly so that the surface cracks caused are avoided by using the die angle 60°. The extrusion die with die angle 180° would increase the higher temperature rise and possibility of crack forma- tion on the rod surface that caused by die angle 60° and temperature rise decrease tensile strength of the AZ31 rod. The experimental results show that die angle 180° could cause continuous cracks on the surface of the extruded rod. The extrusion force required is reduced approximately 15 ton by employing the die angle 60°. Theoretical results obtained by the DeformTM-3D simulation agreed well with the experiments. The obtained results provide the fundamental and also practical guidelines for the design and correction of dies to produce magnesium rod with good surface quality. | Hongjun HU Dingfei ZHANG Fusheng PAN Mingbo YANG | 2009 | Acta Metallurgica Sinica(English Letters)2009，22，5： | 9 |
| 3 | Clarifying the roles of grain boundary and grain orientation on the corrosion and discharge processes of α-Mg based Mg-Li alloys for primary Mg-air batteries显示文摘The corrosion behavior at open circuit potential(OCP)and discharge properties under applied anodic currents of twoα-Mg based Mg-Li alloys,i.e.,LAZ131 and LAZ531,with different microstructural features for primary Mg-air batteries are investigated.The results show that the grain boundaries contribute equally to the corrosion and discharge processes,which are attacked preferentially than the grain interiors and accelerate the dissolution processes ofα-Mg based Mg-Li alloys.The(10-10)/(11-20)orientated grains are attacked preferentially than the(0002)orientated grains on the corrosion and discharge process.The increased corrosion rate and improved discharge properties are attributed to the refinement of grain size,decreased content of(0002)orientated grains and increased content of(10-10)/(11-20)orientated grains.Of those,the LAZ531 alloy possesses high and steady discharge voltage at small discharge current density for long time,with the values of 1.4801 V at 2.5 mA cm^(-2)and 1.3742 V at 10 mA cm^(-2). | Huabao Yang Liang Wu Bin Jiang Wenjun Liu Jiangfeng Song Guangsheng Huang Dingfei Zhang Fusheng Pan | 2021 | Journal of Materials Science & Technology2021，，3： | 9 |
| 4 | Effect of nerve regeneration factor on differentiation of PC12 cells and its signaling pathway显示文摘The effects of nerve regeneration factor (NRF) on neuronal differentiation of PC12 cells and its signaling pathway are investigated by morphological observation and immunofluorescent cytochemical method, and the activity of ERK1/2 in NRF-treated PC12 cells in absence of serum is also studied by immuno-coprecipitation and Western blot analysis. The MEK1/2-specific inhibitor U0126, the broad-spectrum protein kinase C (PKC) inhibitor G6983 and tyrosine protein kinase (TPK) inhibitor genistein were used to determine the roles of the activation of ERK1/2 by NRF and the involvement of certain kinds of PKC or TPK receptor in this activation process. The results show that U0126 and G6983 inhibit the activation of ERK1/2 by NRF to different extents, while genistein has no effect on it, demonstrating that NRF remarkably induces neuronal differentiation of PC12 cells through activating ERK1/2 in a dose-dependent and time-dependent manner. | DINGFei QIANGLiang LIUMei GUXingxing GUXiaosong | 2004 | Progress in Natural Science:Materials International2004，14，11： | 9 |
| 5 | Micro-arc oxidation of magnesium alloys:A review显示文摘Magnesium(Mg)and its alloys present great potential to be extensively applied in different applications.However,the relatively poor resistance to corrosion and wear significantly restricts their applications in practice.As one of strategies of surface treatment,micro-arc oxidation(MAO)process attracts a lot of attention,since it does not use neither expensive equipment,nor complicated manipulation.This review systematically discusses MAO mechanism and some typical models,which still need to be further developed to provide a better understanding and guide for future researchers.Subsequently,main influencing factors of MAO process are analyzed in detail.Further,some popular applications of MAO coatings are respectively reviewed,including biomedical application,decoration,thermal control,corrosion and wear resistance,and industrial applications in practice.The existing issues and future perspectives are finally discussed to further accelerate extensive applications of Mg alloys. | Wenhui Yao Liang Wu Jingfeng Wang Bin Jiang Dingfei Zhang Maria Serdechnova Tatsiana Shulha Carsten Blawert Mikhail L.Zheludkevich Fusheng Pan | 2022 | Journal of Materials Science & Technology2022，，23： | 8 |
| 6 | The role of recrystallization and grain growth in optimizing the sheet texture of magnesium alloys with calcium addition during annealing显示文摘The contribution of recrystallization and grain growth to the texture evolution in AZ31 alloy and a modified version AZ31+0.5 wt.%Ca was investigated utilizing a multi-step annealing process.The results showed that the addition of Ca triggered a considerable texture modification by increasing the texture spread and decreasing the overall texture intensity.This effect was found to be temperature dependent.When the annealing temperature remained lower than 450℃,a weak double peak texture with large basal pole tilt towards the RD was formed.This is correlated to microstructure observations of a large number of Ca-containing nano-sized particles that seemed to suppress grain growth below 450℃,which stabilized the weak recrystallization texture.This favorable texture was lost upon annealing at higher temperatures.In AZ31,recrystallization nuclei were found to preserve the orientation of their deformed parents,which offered limited potential to optimize the texture via annealing treatments.Grain growth of recrystallized grains resulted in a distinct sheet texture transition from a double-peak to a single-peak basal texture.Aspects of grain boundary energy and grain topology are discussed to explain the growth advantage of the sharp basal component over other orientations. | Fei Guo Risheng Pei Luyao Jiang Dingfei Zhang Sandra Korte-Kerzel Talal Al-Samman | 2020 | Journal of Magnesium and Alloys2020，8，1： | 4 |
| 7 | Unveiling annealing texture formation and static recrystallization kinetics of hot-rolled Mg-Al-Zn-Mn-Ca alloy显示文摘The development of Mg-Al-Zn-Mn-Ca series alloys provides a potential prospect to achieve high strength and formability at room temperature(RT).The formation of elliptical annular texture is treated as a crucial factor for the enhanced RT formability.However,the origin of such an elliptical annular texture formation has been rarely reported.Herein,we unveiled the formation and evolution of elliptical annular texture in the hot-rolled Mg-1.6 Al-0.8 Zn-0.4 Mn-0.5 Ca(AZMX1100,wt.%)alloy after annealing at different temperatures for 1 h,and its static recrystallization(SRX)kinetics in given annealing temperature for different time.The results revealed that the formation of elliptical annular texture in the hot-rolled AZMX1100 alloy after annealing was derived from nucleation-oriented SRX mechanism,which took place in 200-300°C,induced by cracked chain-shaped Al2 Ca phases,contraction twins,intersections of double twins,intersections of double twins and grain boundaries and non-basal slips.On further annealing from300-450°C,the grains with 45°–70°transverse direction(TD)preferentially grew,which made elliptical annular texture extended along the TD.Based on the Johnson-Mehl-Avrami-Kolmogorov(JMAK)model,Avrami exponent n value was estimated to be 0.68–1.02,attributed to non-random SRX nucleation,giving rise to the lower activation energy QRof nucleation of^74.24 k J/mol.Since the co-segregation of Al,Zn and Ca atoms in grain boundaries created a strong interaction of solutes and grain boundaries,the hot-rolled AZMX1100 alloy exhibited the higher activation energy Qg(~115.48 k J/mol)of grain growth. | Qinghang Wang Bin Jiang Aitao Tang Jie Fu Zhongtao Jiang Haoran Sheng Dingfei Zhang Guangsheng Huang Fusheng Pan | 2020 | Journal of Materials Science & Technology2020，36，8： | 3 |
| 8 | Effects of Different Stretching Routes on Microstructure and Mechanical Properties of AZ31B Magnesium Alloy Sheets显示文摘AZ31B magnesium alloy sheets were stretched by 13% along three different routes: the extrusion direction(Route A), 45° to the extrusion direction(Route B) and the transverse direction(Route C), and then were annealed at 350 °C for 60 min. The microstructure and texture, tensile mechanical properties and formability were investigated at room temperature. The results indicated that all the three stretched samples exhibited weakened basal texture, compared with the as-received sheet due to static recrystallization.By comparison, Route B processed sample showed the most dispersive basal texture, while Route A processed specimen exhibited the lowest basal intensity. Improved mechanical properties for the stretched and annealed sheets with different stretching routes were achieved. Furthermore, Route A processed sheet showed the highest Erichsen value compared with the samples processed along Route B and Route C. | Jingren Dong Dingfei Zhang Jing Sun Qingwei Dai Fusheng Pan | 2015 | Journal of Materials Science & Technology2015，31，9： | 3 |
| 9 | Investigation on microstructures and mechanical properties of Mg-6Zn-0.5Ce-xMn(x=0 and 1)wrought magnesium alloys显示文摘The microstructure evolution and mechanical properties of Mg–6Zn–0.5Ce–xMn(x=0 and 1 wt.%)wrought magnesium alloys were researched,and the morphologies and role of Mn element in the experimental alloys were analyzed.The research shows that all of Mn elements form theα-Mn pure phases,which do not participate in the formation of other phases,such as theτ-phases.The mechanical properties of Mn-containing alloys in as-extruded and aged states are superior to Mn-free alloys.During the hot extrusion process,the dispersed fineα-Mn particle phase hinders the migration of grain boundaries and inhibits dynamic recrystallization,which mainly takes effect of grain refining and dispersion hardening.During the aging treatments,the dispersed fineα-Mn particle phase not only hinders the growth of the solution-treated grains,but also becomes the nucleation cores ofβ1 rod-like precipitate phase,which is conducive to increasing the nucleation rate of the precipitate phase.For the aged alloy,the Mn addition mainly takes effect of grain refining and promoting aging strengthening. | Caihong Hou Hongshuai Cao Fugang Qi Qing Wang Lianhui Li Nie Zhao Dingfei Zhang Xiaoping Ouyang | 2022 | Journal of Magnesium and Alloys2022，10，4： | 3 |
| 10 | Effect of the width on AZ31 sheet rolling显示文摘A pyramid sheet has been used in experiments and three-dimensional finite element simulation to study the edge cracks and effects of width on AZ31 sheet under rolling.Results show that the edge cracks of Mg sheet comply with the Normalized Crockroft & Latham theory.It can be predicted by D=-0.124+0.09X -0.008X2,if D ≥ 0,the edge cracks occur.The sheet shearing deformation at the edge brings about cracks.The strain rate changes periodically with different X.With initial width increases,the recrystallized grain size decreases.The finite element model has been validated by the experiment results. | Qingwei DAI Dingfei ZHANG Wei LAN Lin FANG Junping ZHANG | 2010 | Acta Metallurgica Sinica(English Letters)2010，23，2： | 2 |
| 11 | Rolling texture development in a dual-phase Mg-Li alloy:The role of temperature显示文摘Dual-phase Mg-Li alloys sheets were rolled at four different temperatures ranging from liquid nitrogen to 300℃to explore effect of rolling temperature on texture and mechanical properties of the material.Crystal plasticity simulation was utilized to illustrate the influence of slip activity on rolling texture development.The results show that the rolling texture is largely depended on deformation temperature.Unlike commercial Mg alloys,the critical resolved shear stress of basal slip inα-Mg phase of Mg-Li alloy decreased more significantly by increasing temperature compared to that of pyramidalslip.Enhancement of basal slip by increasing temperature triggered a decrease of split angle of basal poles for the double-peak texture.Prismaticslip largely enhanced by increasing temperature upon 200℃,which induced a wider orientation spread along the transverse direction.For theβ-Li phase,the promotion of{110}<111>slip system at elevated temperature triggered the enhancement of{211}<110>and{111}<211>texture components.The cryo-rolled sample exhibited the highest strength compared to the others due to a strong hardening behavior at this temperature.A two-stage hardening behavior was observed in these as-rolled dual-phase alloys.Strain transition at phase boundaries could be the reason for appearance of this two-stage hardening. | Xiaoyan Li Fei Guo Yanlong Ma Luyao Jiang Hongliang Lai Haiding Liu Dingfei Zhang Risheng Pei | 2023 | Journal of Magnesium and Alloys2023，11，8： | 2 |
| 12 | 显示文摘 | DingFei(丁飞) LiuXingjiang(刘兴江) ZhangJing(张晶)eta1 | 2010 | 稀有金属材料与工程2010，39，9： | 2 |
| 13 | Short hairpin RNA targeting NP mRNA inhibiting Newcastle disease virus production and other viral structural mRNA transcription显示文摘 | Yue Hua Deng Shu Yang Falong Li Dingfei Fu Anjing Yang Fan Tang Cheng | 2009 | Virus gene2009，38，1： | 1 |
| 14 | Grain size dependence of annealing strengthening of an extruded Mg-Gd-Zn alloy subjected to pre-compression deformation显示文摘In this work, pre-strain annealing strengthening(PSAS) effect was investigated in an extruded Mg-1.0Gd-1.5 Zn(wt.%) alloy with respect to different grain sizes. The evolution of microstructures was provided by scanning electron microscopy(SEM), electron backscattered diffraction(EBSD), transmission electron microscopy(TEM) and high-angle annular dark-field scanning transmission electron microscopy(HAADF-STEM) under the initial state, pre-compression, intermediate annealing and re-compression conditions. The obtained results showed a grain size-dependent PSAS effect in the alloy. The sample with larger grain sizes corresponded to a higher strengthening effect, which mainly resulted from a more remarkable hindrance for the growth of existing twins and a larger proportion of activation for the nucleation of new twins. This was closely associated with the increase of back stress and friction stress for twin boundary motion impeded by the larger restraint of dislocations, the higher stress field surrounding solutes and the more Zn segregation. In addition to twinning behavior, Guinier Preston(G.P.) zones on basaldislocations were found after intermediate annealing and provided an extra strengthening by inhibiting the motions of gilding pre-existing dislocations and newly formed ones, but it was independent on the grain size. | Qinghang Wang Siyuan Chen Bin Jiang Zhaoyang Jin Lingyu Zhao Junjie He Dingfei Zhang Guangsheng Huang Fusheng Pan | 2022 | Journal of Magnesium and Alloys2022，10，12： | 1 |
| 15 | Influence of rolling speed on microstructure and mechanical properties of AZ31 Mg alloy rolled by large strain hot rolling显示文摘 | Fei Guo Dingfei Zhang Xusheng Yang Luyao Jiang Sensen Chai Fusheng Pan | 2014 | Materials Science & Engineering A2014，，： | 1 |
| 16 | On the anisotropic deformation of AZ31 Mg alloy under compression显示文摘 | Qingwei Dai Dingfei Zhang Xi Chen | 2011 | Materials and Design2011，，10： | 1 |
| 17 | Chemical nature of physic acid conversion coating on AZ61 magnesium alloy显示文摘 | Fusheng Pan Xu Yang Dingfei Zhang | 2009 | Appl surf sci2009，255，： | 1 |
| 18 | On the anisotropic deformation of AZ31 Mg alloy under compression显示文摘 | Qingwei Dai Dingfei Zhang Xi Chen | 2011 | Materials and Design2011，，10： | 1 |
| 19 | Understanding the enhanced ductility of Mg-Gd with Ca and Zn microalloying by slip trace analysis显示文摘This research studied the mechanisms of Ca and Zn microalloying on the enhancement of ductility of extruded Mg-Gd sheet by combing electron backscattered diffraction and slip trace analysis.The ductility and microstructure of extruded Mg-0.6Gd and Mg-0.6Gd-0.3Ca-0.2Zn(wt%)sheets were investigated.Basal slip was the main deformation mode under investigation.Ca and Zn microalloying increased the frequency of grain boundaries(GBs)with misorientation angles(θs)<35°,promoted slip transfer across GBs and restricted the basal slip localization.In addition,there were a higher number of GB cracks homogeneously distributed in the Mg-0.6Gd sheet than in the Mg-0.6Gd-0.3Ca-0.2Zn sheet,attributed to the increased cohesion of GBs.The enhancement of basal slip,the suppression of slip localization and the suppression of GB cracking were contributed to the increased ductility for Mg-0.6Gd-0.3Ca-0.2Zn sheet. | Jun Zhao Bin Jiang Yuan Yuan Qinghang Wang Ming Yuan Aitao Tang Guangsheng Huang Dingfei Zhang Fusheng Pan | 2021 | Journal of Materials Science & Technology2021，，36： | 1 |
| 20 | Microstructure Evolution of Cast Al-Si-Cu Alloys in Solution Treatment显示文摘开发一个软件在演员组铝合金的热处理期间预言微观结构的进化和机械性质的开发,我们在解决方案处理期间为溶质的再分配建模多部件合金。solidifi 阳离子模拟软件的预言或实验的结果为热处理的模拟提供了起始的微观结构和溶质分发。通过有硅,铜,镁,和铁的五的铝合金的二进制代码被建模。基本模型假定本地平衡(不在由于成核或生长冷却下面) 并且在稳固的成分的计算散开在团结期间。微观结构的进化被质、量的金属组织学在答案处理期间跟随。为第三的合金 Al-7%Si-3.5%Cu 的模拟的结果与试验性的观察相比。 | ZHANG Dingfei PENG Jian HUANG Guangjie ZENG Dingding | 2008 | Journal of Wuhan University of Technology(Materials Science)2008，23，2： | 1 |
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