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| 1 | Third generation high strength low alloy steels with improved toughness显示文摘On-line thermo mechanical controlled processing(TMCP) was conducted to develop the third generation high strength low alloy(HSLA) steel with high toughness economically.The ultra-low carbon content ensured a high level of upper shelf energy while ultrafine lath martensitic structure transformed from super-thin pancaked austenite during controlled rolling and cooling.The reduction of martensite block size decreased ductile-to-brittle transition temperature(DBTT) and compensated the strength loss due to carbon reduction.Consequently,the excellent balance of strength and toughness values was obtained as 950-1060 MPa for yield strength,180 J for Charpy V-notch impact absorbed energy at 30℃,which is much superior to that of traditional martensitic steel.Two mechanisms for the refinement of lath martensite block were proposed:One is the austenite grain refinement in the direction of thickness,and the other is the reduction in the fraction of sub-block boundaries with small misorientation and the increase in the fraction of block boundaries with large misorientation,possibly due to austenite hardening. | SUN XinJun LI ZhaoDong YONG QiLong YANG ZhiGang DONG Han WENG YuQing | 2012 | Science China(Technological Sciences)2012，55，7： | 7 |
| 2 | An optimal one-way cooperative strategy for two defenders against an attacking missile显示文摘This paper investigates a cooperative strategy for protecting an aerial target.The problem is solved as a game among four players(a target,two defenders,and a missile).In this scenario,the target launches two defenders(defender-1 and defender-2)simultaneously,to establish a oneway cooperation system(OCS)against an attacking missile.A new optimal evasion strategy for the target is also derived.During the engagement,the target takes into account the reaction of the attacking missile,and guides defender-1 to the interception point by receiving information from defender-1.Depending on the control effort of the target,defender-2 can choose appropriate launch conditions and use very limited maneuvering capability to intercept the missile.For adversaries with first-order dynamics,simulation results show that the OCS allows two defenders to intercept the missile.During the engagement,even if one defender or communication channel is broken,the OCS still allows an interception to be made,thus increasing the target’s survivability. | Qilong SUN Naiming QI Zheyao XU Yanfang LIU Yong ZHANG | 2017 | Chinese Journal of Aeronautics2017，30，4： | 6 |
| 3 | THEORETICAL CALCULATION OF SPECIFIC INTERFACIALENERGY OF SEMICOHERENT INTERFACE BETWEEN MICROALLOY CARBONITRIDES AND AUSTENITE显示文摘According to the misfitting dislocation theory,a method of theoretical calculation was devel-oped for the specific energy of the semicoherent interface between microalloy carbonitridesand austenite matrix.The calculating formulae were derived and the results were satisfactorilyapplied on the research works. | YONG Qilong LI Yongfu Yunnan Institute of Technology,Kunming,ChinaSUN Zhenbao WU Baorong Central Iron and Steel Research Institute,Ministry of Metallurgical Industry,Beiiing,China YONG Qilong,Department of Mechanical Engineering,Yunnan Institute of Technology,Kunming,China | 1989 | Acta Metallurgica Sinica(English Letters)1989，2，2： | 4 |
| 4 | Integrated materials design and informatics platform within the materials genome framework显示文摘The fundamental idea of materials genome initiative is the integration of computing platform,experimental platform,and data platform to speed up the material innovation hence reduce time and cost.This paper describes the basic concept of building an integrated computational platform and data platform for material innovation from the perspective of high-throughput simulation and materials knowledge management.The material data platform that can integrate material database,heterogeneous material data,various scripts,and open-source material simulation code together is particularly discussed.Taking metallic materials as an example,a brief introduction to metallic materials data management is given,and how to manage the semi-structure and unstructured iron and steel material data is also presented. | Zhuo Wang Xiaoyu Yang Yufei Zheng Qilong Yong Hang Su Caifu Yang | 2014 | Chinese Science Bulletin2014，59，15： | 3 |
| 5 | Static Recrystallization Behavior of Inconel 718 Alloy during Thermal Deformation显示文摘The softening behavior of Inconel 718 alloy at different temperatures was studied using twostage interrupted compression method on Gleeble1500D thermal stimulator, and the 2% offset method was applied to analyze the experimental dates. Finally, the static recrystallization fraction was obtained. At the same times, optical microscope(OM) and transmission electron microscopy(TEM) were employed to investigate the microstructure characteristic. The experimental results showed that the recrystallization was more sensitive to temperature than holding time. The recrystallization process finished quickly above 1 050 ℃, and significantly prolonged below 1 025 ℃. Additionally, the dynamical model of static recrystallization follows the Avrami equation. The nucleating mechanism was characterized by bulging at grain boundary and merging of sub-grain. | 魏先平 ZHENG Wenjie SONG Zhigang LEI Ting YONG Qilong XIE Qingcheng | 2014 | Journal of Wuhan University of Technology(Materials Science)2014，29，2： | 2 |
| 6 | Ausforming effects on anisotropy of mechanical properties in HSLA martensitic steel显示文摘In order to clarify effects of prior pancaked austenitic structure on microstructure and mechanical properties of transformed martensite in ausformed steel,a super-thin pancaked austenite was processed by multi-pass rolling in a 0.03-2.6Mn0.06Nb-0.01Ti(wt%) low alloy steel.The evolution of prior pancaked austenite grain during multi-pass rolling was studied using Ni-30Fe model alloy.Related with the structure and texture in the prior super-thin pancaked austenite in Ni-30Fe alloy,the texture and anisotropy of mechanical properties of transformed martensite in the studied ausformed steel were focused on.There were mainly three kinds of rolling texture components in the super-thin pancaked austenite:Goss {110} 001,copper {112} 111 and brass {110} 112.They were further transformed into the weak {001} 110 and strong {112} 110,{111} 112 texture components in the martensitic structure.The orientation relationship(OR) of lath martensite transformation from pancaked austenite in the ausformed steel deviated larger from the exact Kurdjumov-Sachs(K-S) OR than in the case of equiaxed austenite without deformation.The tensile and yield strengths of the ausformed martensitic steel first decreased and then increased as the angle between tension direction and rolling direction increased.The main reason for the anisotropy of strength was considered as the texture component {112} 110 in martensite.However,the anisotropy of impact toughness was more complex and the main reasons for it are unknown. | LI ZhaoDong SUN XinJun CAO WenQuan YONG QiLong YANG ZhiGang DONG Han WENG YuQing | 2012 | Science China(Technological Sciences)2012，55，7： | 1 |
| 7 | Strain-induced precipitation in a Ti micro-alloyed HSLA steel显示文摘 | Zhenqiang Wang Xinping Mao Zhigang Yang Xinjun Sun Qilong Yong Zhaodong Li Yuqing Weng | 2011 | Materials Science & Engineering A2011，，： | 1 |
| 8 | Alloying Elements in High Speed Steels显示文摘Effects of alloying elements,Si,Nb,Ti,W,Mo,V,Al and rare earth metals on the microstructure and properties of high speed steels(HSSs) have been reviewed.More attention is paid to effects of Si on the secondary hardening and V on the morphology of eutectic carbides in HSSs.A lot of work has been carried out on the behavior of alloying elements in HSSs in the past decade,and some new types of HSSs containing silicon,aluminum or rare earth metals have been successfully developed in the world. | Pan Fusheng Tang Aitao Chen Jian Zhang Jin Ding Peidao Yong Qilong | 1999 | Journal of Iron and Steel Research(International)1999，6，2： | 1 |
| 9 | Precipitation of MC phase and precipitation strengthening in hot rolled Nb-Mo and Nb-Ti steels 显示文摘 | Cao Jianchun Yong Qilong Liu Qingyou | 2007 | J Mater Sci2007，42，10： | 1 |
| 10 | Strengthening Effects of Niobium on High Strength Rebars显示文摘 | Zhang Yongqing Guo Aimin Yong Qilong | 2018 | Journal of Mechanics Engineering and Automation2018，8，2： | 0 |
| 11 | Solution and Precipitation Behavior of Nb and Its Role in Medium Carbon Long Product Steels显示文摘Controlling of the solution and precipitation for microalloying additions of Nb,V,Ti and their combination is the basic building block of microalloyed steels.Among three microalloying elements,Nb has been regarded the most effective microalloying ingredient used for low carbon flat products due to marked strengthening effect of grain refinement and relatively weak precipitation strengthening effect by matching proper thermomechanical processing(TMP).However,Nb was not viewed as attractive as V for medium carbon long products in the past because of limited solubility during reheating process.What is more,hot working is usually carried out at high temperatures in the recrystallization regime,so it is difficult to exert conventional controlled rolling to obtain pancaked austenite,which has further affected the research and application of Nb in medium carbon long products.Because of these factors,studies of Nb in medium carbon long products were incomplete,and even some recognitions and conclusions are subjected to debate.In order to clarify the strengthening effects of Nb in medium carbon long products,the reinforcing bars have been chosen as experimental steels to clarify the role of Nb on microstructural changes along the whole hot working,cooling processes.In addition,qualitative and quantitative analyses of Nb’s state and distribution in reheating,rolling and cooling had been carried out to illustrate some singularities. | Zhang Yongqing Wang Maoqiu Yong Qilong Jose MRodriguez-Ibabe Leonardo Silvestre | 2022 | Journal of Mechanics Engineering and Automation2022，12，1： | 0 |
| 12 | Metallurgical Design, Development and Strengthening Mechanisms for HRB600E Reinforcing Bar显示文摘High-strength,anti-seismic requirements represent the development tendency to hot-rolled ribbed bar used for the reinforcement of concrete.In this paper,metallurgical design,development and strengthening mechanisms for 600 MPa reinforcing bar with anti-seismic requirements have been studied and presented based on the production practice of 335 MPa,400 MPa and 500 MPa grades.Through trial and error,it was found that alloy design with niobium plus vanadium is the best way to achieve the optimum combination of yield strength and anti-seismic properties,especially,small amount niobium addition can improve upon tensile-to-yield ratio.In order to clarify the underlying theoretical principles for the strengthening effects,qualitative and quantitative analysis for microstructure had been conducted with the aid of optical microscopy,scanning electron microscopy,transmission electron microscopy and chemical extraction technique,together with the solution and precipitation behavior of niobium and vanadium during the hot-rolling and cooling processes.Based on analysis results,it was found strengthening effects of both niobium and vanadium demonstrate some additional strengthening effects apart from predominated precipitation strengthening and grain refinement strengthening respectively.Although adding high vanadium contents is indispensable to achieve needed yield strength through precipitation strengthening effects,but fine VN particles precipitated in relatively high temperature also bring grain refinement effects for austenite and ferrite.Equally,grain refinement is not overall to describe the effects of niobium in long products,small amount of niobium contents is marked to improve upon tensile-to-yield ratio due to transformation strengthening resulted from the niobium contents in solution.Through the development of HRB600E,strengthening mechanisms of vanadium and niobium in medium carbon long products had been enriched. | Zhang Yongqing Wang Maoqiu Yong Qilong Nie Wenjin Jose MRodriguez-Ibabe Marcelo Rebellato | 2021 | Journal of Mechanics Engineering and Automation2021，11，1： | 0 |
| 13 | Synthetic studies towards(-)-deserpidine:Total synthesis of the stereoisomer and derivative of (-)-deserpidine显示文摘The asymmetric synthesis of 16,17,20-epi-deserpidine and a derivative of(-)-deserpidine has been achieved.Key feature s in the assembly of the pentacyclic framework include a visible-light photocatalytic intra-/inter-/intramolecular radical cascade reaction to construct the tetracyclic ABCD ring system in one-pot and an intramolecularaldol reaction to forge the cyclohexane E ring. | Pingzhou Wu Qilong Zhou Xiao-Yu Liu Fei Xue Yong Qin | 2021 | Chinese Chemical Letters2021，32，1： | 0 |
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