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| 1 | Evolution of the Microstructure and Strength in the Nugget Zone of Friction Stir Welded SiCp/Al-Cu-Mg Composite显示文摘A 6 mm-thick SiCp/2009AI composite plate was successfully joined by friction stir welding(FSW) using an ultrahard material tool to investigate the evolution of the microstructure and the strength in the nugget zone(NZ).While some SiC particles were broken up during FSW,most of them rotated in the matrix.Large compound particles on the interfaces were broken off during FSW,whereas the amorphous layer and small compound particles remained on the interfaces.The dynamically recrystallized Al grains nucleated on the surface of fractured SiC particles during FSW,forming nano-sized grains around the SiC particles.The yield strength of the NZ decreased slightly due to the variation in the size,shape,and distribution of the SiC particles.The clean interfaces were beneficial to the load transfer between SiC particles and Al matrix and then increased the ultimate tensile strength of the NZ. | D.Wang B.L.Xiao Q.Z.Wang Z.Y.Ma | 2014 | Journal of Materials Science & Technology2014，30，1： | 9 |
| 2 | The effects of fabrication atmosphere condition on the microstructural and mechanical properties of laser direct manufactured stainless steel 17-4 PH显示文摘The effects of atmosphere conditions on microstructural and mechanical properties of stainless steel 17-4PH components fabricated by laser direct manufacturing (LDM) were investigated through mea-surements on phase constitution, porosity, tensile strength, fracture morphology, hardness and evolution of substrate temperature. Results showed that the samples produced in air atmosphere condition pos-sessed higher tensile strength and hardness for both as-deposited and heat-treated states than that in Ar chamber condition, due to dispersion strengthening effect of amorphous oxide particles and nitrogen solution strengthening as a result of higher content of oxygen and nitrogen. The temperature of substrate heat accumulation was higher in Ar chamber condition, leading to dramatically lower porosity and more reverse austenite, which also contributed to the lower strength and hardness. | D.Wang C.T.Chi W.Q.Wang Y.L.Li M.S.Wang X.G.Chen Z.H.Chen X.P.Cheng Y.J.Xie | 2019 | Journal of Materials Science & Technology2019，35，7： | 6 |
| 3 | Achieving ultra-high strength friction stir welded joints of high nitrogen stainless steel by forced water cooling显示文摘The microstructure and properties of water-cooled and air-cooled friction stir welded(FSW) ultra-high strength high nitrogen stainless steel joints were comparatively studied. With additional rapid cooling by flowing water, the peak temperature and duration at elevated temperature during FSW were significantly reduced. Compared to those in the air-cooled joint, nugget zone with finer grains(900 nm) and heat affected zone with higher dislocation density were successfully obtained in the water-cooled joint,leading to significantly improved mechanical properties. The wear of the welding tool was significantly reduced with water cooling, resulting in better corrosion resistance during the immersion corrosion test. | H.Zhang D.Wang P.Xue L.H.Wu D.R.N B.L.Xiao Z.Y.Ma | 2018 | Journal of Materials Science & Technology2018，34，11： | 5 |
| 4 | Effects of welding speed on the multiscale residual stresses in frictionstir welded metal matrix composites显示文摘The effects of welding speed on the macroscopic and microscopic residual stresses(RSes) in friction stir welded 17 vol.% SiCp/2009 Al-T4 composite plates were studied via neutron diffraction and an improved decoupled hierarchical multiscale modeling methods. Measurements showed that the macroscopic and total RSes had the largest variations in the longitudinal direction(LD). Increasing the welding speed led to higher values of measured LD macroscopic and total RSes in the matrix. The welding speed also significantly influenced the distributions and magnitudes of the microscopic RSes. The RSes were predicted via an improved hierarchical multiscale model, which includes a constant coefficient of friction based thermal model. The RSes in the composite plates before friction stir welding(FSW) were computed and then set as the initial states of the FSW process during modeling. This improved decoupled multiscale model provided improved predictions of the temperature and RSes compared with our previous model. | X.X.Zhang L.H.Wu H.ANDra W.M.Gan M.Hofmann D.Wang D.R.Ni B.L.Xiao Z.Y.Ma | 2019 | Journal of Materials Science & Technology2019，35，5： | 4 |
| 5 | 高原负地闪前云闪K-型击穿过程的观测研究显示文摘利用GPS同步的高时间分辨率闪电电场变化仪,对青藏高原东部地区的雷电特征进行了多点同步观测,得到了1μs时间分辨率的多站同步闪电电场变化资料。利用高频辐射脉冲到达不同测站的时间差,对一次负地闪前的云闪K-型击穿过程进行了分析,得到了其放电过程的起始位置和发展路径.K-型击穿过程起始于云中部的负电荷区,并以1.5×10~7m/s的速度向下部正电荷区域传播。雷暴云中正、负电荷离地高度分别为2.5~3.5km和5.0~6.0km。 | 郄秀书 余晔 张广庶 刘欣生 D.Wang T.Watanabe N.Takagi Z.Kawasaki T.Ushio | 2000 | 自然科学进展(国家重点实验室通讯)2000，10，4： | 4 |
| 6 | Friction Stir Welding of Discontinuously Reinforced Aluminum Matrix Composites:A Review显示文摘Friction stir welding(FSW) is considered a promising welding technique for joining the aluminum matrix composites(AMCs) to avoid the drawbacks of the fusion welding. High joint efficiencies of 60%–100% could be obtained in the FSW joints of AMCs. However, due to the existence of hard reinforcing particles in the AMCs, the wearing of welding tool during FSW is an unavoidable problem. Moreover, the low ductility of the AMCs limits the welding process window. As the hard materials such as Ferro-Titanit alloy, cermet, and WC/Co were applied to produce the welding tools,the wearing of the tools was significantly reduced and the sound joints could be achieved at high welding speed for the AMCs with low reinforcement volume fraction. In this article, current state of understanding and development of welding tool wearing and FSW parameters of AMCs are viewed. Furthermore, the factors affecting the microstructure and mechanical properties of the joints are evaluated in detail. | D.Wang B.L.Xiao D.R.Ni Z.Y.Ma | 2014 | Acta Metallurgica Sinica(English Letters)2014，27，5： | 4 |
| 7 | 双种植体修复在第一磨牙缺失中的应用显示文摘目的;探讨第-磨牙缺失用两个种植体支持修复的临床可行性。方法:对9例第一磨牙缺失患者进行双种植体支持的种植修复。结果:9名患者修复后经过短期随访,该种植修复体功能良好、无疼痛症状和牙龈红肿、出血,X线未发现种植体周围骨质明显吸收。结论:用双种植体修复第一磨牙缺失可以减少单种植体修复潜在的悬臂作用,具有临床应用价值。 | 余优成 Peter D.Wang | 2000 | 中国临床医学2000，7，4： | 2 |
| 8 | Effect of heat-input on pitting corrosion behavior of friction stir welded high nitrogen stainless steel显示文摘In this study, different welding param eters were selected to investigate the effects of heat-in put on the microstructure and corrosion resistance of the friction stir welded high nitrogen stainless steel joints. The results show ed that, the welding speed had major influence on the duration at elevated tem perature rather than the peak tem perature. The hardness distribution and tensile properties of the nugget zones (NZs) for various joints were very similar while the pitting corrosion behavior of various NZs showed major differences. Large heat-input resulted in the ferrite bands being the pitting location, while tool wear bands were sensitive to pitting corrosion in the low heat-input joints. Cr diffusion and tool wear were the main reasons for pitting. The mechanisms of pitting corrosion in the NZs were analyzed in detail. | H.Zhang P.Xue D.Wang L.H.Wu D.R.Ni B.L.Xiao Z.Y.Ma | 2019 | Journal of Materials Science & Technology2019，35，7： | 2 |
| 9 | Temperature and Nitric Oxide Generation in a Pulsed Arc Discharge Plasma显示文摘Nitric oxide (NO) is increasingly being used in medical treatments of high bloodpressure,acute respiratory distress syndrome and other illnesses related to the lungs.Currentlya NO inhalation system consists of a gas cylinder of N_2 mixed with a high concentration of NO.This arrangement is potentially risky due to the possibility of an accidental leak of NO from thecylinder.The presence of NO in the air leads to the formation of nitric dioxide (NO_2),which istoxic to the lungs.Therefore,an on-site generator of NO would be highly desirable for medicaldoctors to use with patients with lung disease.To develop the NO inhalation system without a gas cylinder,which would include a high con-centration of NO,NAMIHIRA et al have recently reported on the production of NO from roomair using a pulsed arc discharge.In the present work,the temperature of the pulsed arc dischargeplasma used to generate NO was measured to optimize the discharge condition.The resultsof the temperature measurements showed the temperature of the pulsed arc discharge plasmareached about 10,000 K immediately after discharge initiation and gradually decreased over tensof microseconds.In addition,it was found that NO was formed in a discharge plasma havingtemperatures higher than 9,000 K and a smaller input energy into the discharge plasma generatesNO more efficiently than a larger one. | T.NAMIHIRA S.SAKAI M.MATSUDA D.WANG T.KIYAN H.AKIYAMA K.OKAMOTO K.TODA | 2007 | Plasma Science and Technology2007，9，6： | 1 |
| 10 | Association of methylenetetrahydrofolate reductase and thymidylate synthase promoter polymorphisms with genetic susceptibility to esophageal and cardia cancer in a Chinese high‐risk population显示文摘 | L.‐D.Wang R.‐F.Guo Z.‐M.Fan X.He S.‐S.Gao H.‐Q.Guo K.Matsuo L.‐M.Yin J.‐L.Li | 2005 | Diseases of the Esophagus2005，，3： | 1 |
| 11 | Maximizing the natural frequency of a beam with an intermediate elastic support显示文摘 | D.Wang M.I.Friswell Y.Lei | | 0，，： | 1 |
| 12 | Prevalence and incidence of ocular trauma in North China: the Beijing Eye Study显示文摘 | Jin D.Wang LiangXu Ya X.Wang Qi S.You Jing S.Zhang Jost B.Jonas | 2012 | Acta Ophthalmologica2012，，1： | 1 |
| 13 | Alterations in intestinal function in acute pancreatitis in an experimental model显示文摘 | X. D.Wang Q.Wang R.Andersson I.Ihse | 2005 | Br J Surg2005，，11： | 1 |
| 14 | Theory and application of distribution electronic power transformer显示文摘 | D.Wang C.Mao J.Lu S.Fan F.Z.Peng | | 0，，： | 1 |
| 15 | Low-Cycle Fatigue Properties of Nickel-Based Superalloys Processed by High-Gradient Directional Solidification显示文摘The low-cycle fatigue(LCF) properties of DD10(single-crystal) and DZ53(columnar-grained) superalloys solidified by liquid–metal cooling(LMC) and high-rate solidification(HRS) processes have been systematically investigated. It was found that the LCF life of DZ53 solidified by LMC was obviously better than that solidified by HRS. In contrast, for DD10, LMC showed no remarkable influences on LCF properties at high temperature and only improved LCF properties at intermediate temperature. Microstructure examination showed that the cracks generally initiated at micropores in the subsurface at intermediate temperature. However, the cracks occurred on the surface due to oxidation, or persistent slip bands near script-MC at high temperature. Therefore, the benefits of LMC technique can be attributed to both of the reduced casting defects which significantly affect the LCF properties at intermediate temperature and the improved microstructural homogeneity which was strongly correlated to the LCF properties of alloys at high temperature. | Z.D.Fan D.Wang C.Liu G.Zhang J.Shen L.H.Lou J.Zhang | 2017 | Acta Metallurgica Sinica(English Letters)2017，30，9： | 1 |
| 16 | Achieving superior mechanical properties of selective laser melted AlSi10Mg via direct aging treatment显示文摘For additive manufactured aluminum alloys,the inferior mechanical properties along the building direction have been a serious weakness.In this study,an optimized heat treatment was developed as a simple and effective solution.The effects of direct aging on microstructure and mechanical properties along the building direction of AlSi10Mg samples produced via selective laser melting(SLM)were investigated.The results showed that,compared with the conventional heat treatment at elevated temperatures,direct aging at temperatures of 130-190℃ could retain the fine grain microstructure of SLM samples and promote further precipitation of Si phase,however,the growth of pores occurred during direct aging.With increasing aging temperature,while finer cell structures were obtained,more and larger pores were developed,resulting in decreased density of the samples.Two types of pore formation mechanisms were identified.Considering the balance between the refinement of cell structure and the growth of pores,aging at 130℃ was determined as the optimized heat treatment for SLM AlSi10Mg samples.The tensile strength along the building direction of the 130℃ aged sample was increased from 403 MPa to 451 MPa,with relatively high elongation of 6.5%. | H.Zhang Y.Wang J.J.Wang D.R.Ni D.Wang B.L.Xiao Z.Y.Ma | 2022 | Journal of Materials Science & Technology2022，，13： | 1 |
| 17 | A simple gel route to synthesize nano-Li4Ti5O12 as a high-performance anode material for Li-ion batteries显示文摘 | D.Wang N.Ding X.H.Song | | 0，，01： | 1 |
| 18 | Abnormal distribution of microhardness in tungsten inert gas arc butt-welded AZ61 magnesium alloy plates显示文摘 | N.Xu J.Shen W.D.Xie L.Z.Wang D.Wang and D.Min | | 0，，： | 1 |
| 19 | Association of methylenetetrahydrofolate reductase and thymidylate synthase promoter polymorphisms with genetic susceptibility to esophageal and cardia cancer in a Chinese high‐risk population显示文摘 | L.‐D.Wang R.‐F.Guo Z.‐M.Fan X.He S.‐S.Gao H.‐Q.Guo K.Matsuo L.‐M.Yin J.‐L.Li | 2005 | Diseases of the Esophagus2005，，3： | 1 |
| 20 | The joint effect of investor protection and Big 4 audits on earnings quality around the world显示文摘 | Francis.J D.Wang | | 0，，01： | 1 |
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