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| 1 | Bimodal microstructure – A feasible strategy for high-strength and ductile metallic materials显示文摘Introducing a bimodal grain-size distribution has been demonstrated an efficient strategy for fabricating high-strength and ductile metallic materials, where fine grains provide strength, while coarse grains enable strain hardening and hence decent ductility. Over the last decades, research activities in this area have grown enormously, including interesting results on fcc Cu, Ni and Al-Mg alloys as well as steel and Fe alloys via various thermo-mechanical processing approaches. However, investigations on bimodal Mg and other hcp metals are relatively few. A brief overview of the available approaches based on thermomechanical processing technology in producing bimodal microstructure for various metallic materials is given, along with a summary of unusual mechanical properties achievable by bimodality, where focus is placed on the microstructure-mechanical properties and relevant mechanisms. In addition, key factors that influencing bimodal strategies, such as compositions of starting materials and processing parameters,together with the challenges this research area facing, are identified and discussed briefly. | Min Zha Hong-Min Zhang Zhi-Yuan Yu Xuan-He Zhang Xiang-Tao Meng Hui-Yuan Wang Qi-Chuan Jiang | 2018 | Journal of Materials Science & Technology2018，34，2： | 8 |
| 2 | Tailoring bimodal grain structure of Mg-9Al-1Zn alloy for strength-ductility synergy:Co-regulating effect from coarse Al_(2)Y and submicron Mg_(17)Al_(12) particles显示文摘Grain boundary strengthening is an effective strategy for increasing mechanical properties of Mg alloys.However,this method offers limited strengthening in bimodal grain-structured Mg alloys due to the difficultly in increasing the volume fraction of fine grains while keeping a small grain size.Herein,we show that the volume fraction of fine grains(FGs,~2.5μm)in the bimodal grain structure can be tailored from~30 vol.%in Mg-9 Al-1 Zn(AZ91)to~52 vol.%in AZ91-1Y(wt.%)processed by hard plate rolling(HPR).Moreover,a superior combination of a high ultimate tensile strength(~405 MPa)and decent uniform elongation(~9%)is achieved in present AZ91-1Y alloy.It reveals that a desired bimodal grain structure can be tailored by the co-regulating effect from coarse Al_(2)Y particles resulting in inhomogeneous recrystallization,and dispersed submicron Mg_(17)Al_(12)particles depressing the growth of recrystallized grains.The findings offer a valuable insight in tailoring bimodal grain-structured Mg alloys for optimized strength and ductility. | Yong-Kang Li Min Zha Hai-Long Jia Si-Qing Wang Hongmin Zhang Xiao Ma Teng Tian Pinkui Ma Hui-Yuan Wang | 2021 | Journal of Magnesium and Alloys2021，9，5： | 6 |
| 3 | Synthesis of a kind of geminal imidazolium ionic liquid with long aliphatic chains显示文摘与长烃组,一起的新奇 geminal imidazolium ionic 液体 1,4 二度(3-tetradecylimidazolium-1-yl ) 钢瓶煤气溴化物被综合,一个有效综合方法详细地被介绍。它的结构被英尺红外决定,(1 ) H NMR 和元素的分析。 | Yun Sheng Ding Min Zha Jun Zhang Seng Shan Wang | 2007 | Chinese Chemical Letters2007，18，1： | 5 |
| 4 | Alloying design and microstructural control strategies towards developing Mg alloys with enhanced ductility显示文摘Nowadays,magnesium(Mg)alloys are promising lightweight structural materials,especially in transportation and aerospace fields,due to their inherent low density and high specific strength.Most of the high-strength Mg alloys exhibit poor formability and ductility at room temperature,which limit their wide applications.However,by proper alloying design and/or delicate microstructural control,some newly developed Mg alloys,including rare-earth(RE)and RE-free ones,show enhanced ductility without significant loss of strength.To identify the critical reasons,recent researches on ductile Mg alloys have been reviewed from the aspects of alloying design strategies and microstructural control via advanced processing technologies.Moreover,some outlooks on enhanced ductility of Mg alloys are suggested,e.g.enhancing the beneficial effect of solute atoms,introducing second phase particles,tailoring bimodal-grained structures,introducing pre-twinning structures,etc.The current research progresses in alloying design and/or novel microstructural control have shed some lights on designing and producing Mg alloys with enhanced ductility. | Zhong-Zheng Jin Min Zha Si-Qing Wang Shi-Chao Wang Cheng Wang Hai-Long Jia Hui-Yuan Wang | 2022 | Journal of Magnesium and Alloys2022，10，5： | 5 |
| 5 | Effect of large thickness-reduction on microstructure evolution and tensile properties of Mg-9Al-1Zn alloy processed by hard-plate rolling显示文摘The effect of large thickness-reduction on microstructure evolution and tensile properties of Mg-9 Al-1 Zn alloy(AZ91)processed by hard-plate rolling(HPR)was investigated.Increasing rolling reduction from55%to 85%increases the volume fraction and refines average size of fine grains(<3μm,FGs),leading to an optimized bimodal-grained structure consisting of coarse grains(CGs)uniformly embedded in FG regions.The sample with 85%reduction exhibits the highest yield strength of~314 MPa,ultimate tensile strength of~381 MPa and elongation of~11%.The high strength is primarily due to the contribution of grain boundaries(GBs)strengthening by FGs(accounting for~65%of strength),meanwhile the improved ductility originates from the optimized bimodal-grained structure and weakened basal texture that favor a higher ductility.The present findings successfully overcome the trade-off dilemma that the largereduction rolling processing on Mg alloys usually enhances strength at expense of ductility.In addition,the intensified heterogeneous deformation and favorable formation of a bimodal-grained microstructure during large-reduct ion HPR was addressed by tracing micro structure evolution details in grains of intere st via quasi-in-situ electron back scattering diffraction(EBSD).The present study can be instructive for further designing novel Mg alloys by tailoring bimodal-grained structures for superior combination of mechanical properties. | Yong-Kang Li Min Zha Jian Rong Hai-long Jia Zhong-Zheng Jin Hong-Min Zhang Pin-Kui Ma Hong Xu Ting-Ting Feng Hui-Yuan Wang | 2021 | Journal of Materials Science & Technology2021，，29： | 4 |
| 6 | Effects of Mg17Al12 second phase particles on twinning-induced recrystallization behavior in Mg–Al–Zn alloys during gradient hot rolling显示文摘This study aims to investigate the promotion effect of twinning-induced nucleation vs the inhibition effect of Mgi7Ali2 particles pinning for recrystallization, achieved through gradient rolling for Mg-3Al-lZn (AZ31) and Mg-9Al-lZn (AZ91) alloys as well as pure Mg. Through gradient rolling, a transition zone from the initial to deformed microstructure undergoing varying thickness reductions was obtained in the same sample, where the evolution of deformation twins and second phase can be examined precisely and continuously. During hot deformation, dynamic recrystallized (DRXed) grains tended to originate from {10 T 1 }-{10 T 2} double twins, whose nucleation was significantly restricted by increasing A1 content and hence recrystallization can be rarely triggered in AZ91 alloy. Concurrently, the size and volume fraction of Mgi7Ali2 particles changed via dissolution and re-precipitation, leading to finer average size and higher volume fraction, which produced stronger pinning effect and hindered dynamic recrystallization significantly. The current study provides insights into the mechanisms responsible for dynamic recrystallization behavior during hot rolling in Mg-AI-Zn alloys. | Zhong-ZhengJin Xiu-Ming Cheng Min Zha Jian Rong Hang Zhang Jin-Guo Wang Cheng Wang Zhi-Gang Li Hui-Yuan Wang | 2019 | Journal of Materials Science & Technology2019，35，9： | 4 |
| 7 | Reaction pathway and phase transitions in Al-Ti-Si system during differential thermal a- nalysis显示文摘 | Wang Huiyuan Zha Min Liu Sijie | 2010 | Solid State Sciences2010，12，8： | 1 |
| 8 | A unified formulation for circle and polygon concrete-filledsteel tube columns under axial compression 显示文摘 | YU MIN ZHA XIAOXIONG YE JIANQIAO | 2013 | Engineering Structures2013，49，： | 1 |
| 9 | A rolled Mg-8Al-0.5Zn-0.8Ce alloy with high strength-ductility synergy via engineering high-density low angle boundaries显示文摘Developing low-cost rolled Mg alloys with both high strength and ductility is desirable,while the improved strength is generally accompanied with decreased ductility.Here,by using rotated hard-plate rolling(RHPR)with a total thickness reduction of~85%,we obtained a Mg-8Al-0.5Zn-0.8Ce(wt.%,AZ80-0.8Ce)alloy with a high strength-ductility synergy,i.e.,the yield strength(YS),ultimate tensile strength(UTS)and elongation-to-failure(EF)are~308 MPa,~360 MPa and~13.8%,respectively.It reveals that the high YS is mainly originated from grain boundary strengthening(~212 MPa),followed by dislocation strengthening(~43 MPa)and precipitation hardening(~25 MPa).It is found that a relatively homogeneous fine grain structure containing a large fraction(~62%)of low angle boundaries(LABs)is achieved in the RHPRed alloy,which is benefit for the high tensile EF value.It demonstrates that LABs have important contributions to strengthening and homogenizing tensile deformation process,leading to the simultaneous high strength and high EF.Our work provides a new insight for fabrication of low-cost high performance Mg alloys with an excellent strength-ductility synergy. | Xiao Ma Min Zha Siqing Wang Yi Yang Hailong Jia Dan Gao Cheng Wang Huiyuan Wang | 2022 | Journal of Magnesium and Alloys2022，10，10： | 1 |
| 10 | Trigger and noise filtering algorithms for the LHAASO water Cherenkov detector array显示文摘Introduction The Large High Altitude Air Shower Observatory(LHAASO)will be constructed at Mt.Haizishan,Sichuan Province,China.Among several detector components of the LHAASO,the Water Cherenkov Detector Array(WCDA)is of great importance for gamma-ray astronomy from 100 GeV to 30 TeV.The single-channel counting rate of a photo-multiplier tube can reach as high as 30-35 kHz,most of them are background noise hits from the low energy cosmic ray showers,bringing a big challenge on data transferring,data storage and event reconstruction.Methods In this paper,a dedicated trigger scheme and a fast noise filtering method aiming to deal with these high rate background noise hits are introduced.These methods are tested with some Monte Carlo simulation data,showing a fair efficiency in filtering background noise hits,while most of the real shower signals are kept.Conclusion This method is proposed to be applied in a stage of the online processing just after the data are acquired in LHAASO-WCDA. | Xiao-Jie Wang Zhi-Guo Yao Min Zha Ming-Jun Chen Bo Gao De-Zhi Huang Hui-Cai Li Jin-Yan Liu Wen-Ying Liao Han-Rong Wu For the LHAASO collaboration | 2017 | Radiation Detection Technology and Methods2017，1，2： | 1 |
| 11 | New Glyceroglycolipid and Ceramide fromPremna microphylla 显示文摘 | Zhan Zha - Jun Yue Jian - Min | 2003 | COMMUNICATION2003，38，12： | 1 |
| 12 | The influence of joints and composite floor slabs on effective tying of steel structures in preventing pro-gressive collapse显示文摘 | Min Yu Zha Xiao-xiong Ye Jian-qiao | 2010 | Journal of Constructional Steel Research2010，66，1： | 1 |
| 13 | Unified formulation for hollow and solid concrete-filled steel tube columns under axial eompression 显示文摘 | Yu Min Zha Xiao-xiong Ye Jian-qiao | 2010 | Engineering Structures2010，32，4： | 1 |
| 14 | A unified formulation for hollow and solid concrete-filled steel tube columns under axial compression显示文摘 | YU Min ZHA Xiaoxiong YE Jianqiao | 2010 | Engineering Structures2010，32，4： | 1 |
| 15 | A unified formulation for hollow and solid concrete-filled steel tube columns under axial compression 显示文摘 | YU Min ZHA Xiao-xiong YE Jian-qiao SHE Chun-yan | 2010 | Journal of Engineering Structures2010，32，4： | 1 |
| 16 | A unified formulation for circle and polygon concrete-filled steel tube columns under axial compression 显示文摘 | YU Min ZHA Xiao-xiong YE Jian-qiao LI Yu-ting | 2013 | Journal of Engineering Structures2013，49，1： | 1 |
| 17 | The Influence of Joints and Composite Floor Slabs on Effective Tying of Steel Structures in Pre- venting Progressive Collapse 显示文摘 | Yu Min Zha Xiaoxiong Ye Jianqiao | 2010 | Journal of Constructional Steel Research2010，66，3： | 1 |
| 18 | Off-hour effect is not significant in endovascular treatment for anterior circulation large vessel occlusion in a multicentre registry显示文摘Background and purpose Whether the off-hour effect has an impact on workflow and outcomes of endovascular treatment(EVT)for anterior circulation large vessel occlusion(AC-LVO)remains uncertain.This study aimed to compare the characteristics and outcomes of patients who presented or were treated during off-hour versus on-hour in a multi-center registry.Methods AC-LVO patients from 21 centres were categorised into the off-hour group and the on-hour group.Off-hour(weekends,holidays,and 18:00-7:59 on weekdays)and on-hour(8:00-17:59 on weekdays except for holidays)were defined according to arrival and groin-puncture time points,respectively.Subgroup comparisons between patients both arrived and treated during off-hour(true off-hour)and on-hour(true on-hour)were performed.The primary outcome was the 90-day modified Rankin Scale(mRS)score.Secondary outcomes included favourable outcome(mRS 0-2 at 90 days),EVT-related time metrics,and other clinical outcomes.Ordinary and binary logistic regression and linear regression were taken to adjust for confounding factors.Results Of all 698 patients enrolled,435(62.3%)and 456(65.3%)patients were categorised into the off-hour arrival and off-hour puncture group,respectively.Shorter onset to door time(adjustedßcoefficient:−21.56;95%CI−39.96 to−3.16;p=0.022)was noted in the off-hour arrival group.Ordinal and dichotomous mRS scores at 90 days were comparable between the off-hour group and the on-hour group regardless of off-hour definitions.Other time metrics and outcomes were comparable between the two groups.Of 595 patients both presented and were treated during off-hour or on-hour,394 patients were categorised into the true off-hour group and 201 into the true on-hour group.Time metrics and clinical outcomes were similar between the true off-hour and the true on-hour group.Conclusions The off-hour effect was not significant regarding clinical outcomes and in-hospital workflow in AC-LVO patients receiving EVT in this Chinese multicentre registry. | Mingming Zha Qingwen Yang Shuo Liu Kangmo Huang Xiaohao Zhang Min Wu Haodi Cai Qiushi Lv Rui Liu Dong Yang Xinfeng Liu | 2021 | Stroke & Vascular Neurology2021，6，4： | 1 |
| 19 | The Influence of Joints andComposite Floor Slabs on Effective Tying of Steel Structures in Preventing Progressive Collapse 显示文摘 | Yu Min Zha Xiaoxiong Ye Jianqiao | 2010 | Journal of Constructional Steel Research2010，66，： | 1 |
| 20 | Herbicidal Activities of Eupatorium adenophorum Extracts by 3 Extraction Methods显示文摘[Objective] The paper was to screen the better extraction method for herbicidal active substances of Eupatorium adenophorum. [Method] Three common extraction methods, Soxhlet extraction, ultrasonic extraction and conventional extraction method, were used to prepare E. adenophorum extracts, and the herbicidal activity of E. adenophorum extracts extracted by 3 methods was studied by seed germination method. [Result] The extraction rate of Soxhlet extraction was the highest of (22.54±0.48)%, and the herbicidal activities of E. adenophorum extracted by Soxhlet extraction was relatively stronger. [Conclusion] Soxhlet extraction was the better extraction method for herbicidal active substances of E. adenophorum. | Yougui ZHA Yongqing LI Liming FAN Min YE Chun XIAO Jing WANG | 2012 | Plant Diseases and Pests2012，3，2： | 1 |
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