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Novel insight into dry sliding behavior of Cu-Pb-Sn in-situ composite with secondary phase in different morphologyB.W.Dong,S.H.Wang,Z.Z.Dong,J.C.Jie,T.M.Wang,T.J.LiSchool of Material Science and Engineering, Dalian University of Technology摘 要:The Cu-24 Pb-x Sn(wt%)(x = 0, 2, 4, 6) alloys with Pb-rich second-phase particles(SPPs) in different shapes show......
phase decreases significantly, and there is no secondary phase in the center of grains. In the process of solidification, the solutes get mixed by two mechanisms, namely, diffusion and natural convection... to analyze the composition of the secondary phases (Figure 5) in the 7085 aluminum alloy, and the results are presented in Table 3. According to the EDS analysis, the lamellar phase in spot 2 of Figure 5......
J. Cent. South Univ. Technol. (2011) 18: 1780-1788 DOI: 10.1007/s11771-011-0902-4 Simulation of faceted dendrite growth of non-isothermal alloy in forced flow by phase field method CHEN Zhi(陈志)1, HAO... phase field model was presented to simulate the dendritic shape of a non-isothermal alloy with strong anisotropy in a forced flow. The simulation results show that a crystal nucleus grows......
Effect of eutectic phase on damping and mechanical properties of as-cast Mg-Ni hypoeutectic alloys WAN Di-qing(万迪庆), WANG Jin-cheng(王锦程), WANG Gai-fang(王改芳), LIN Lin(林 琳), FENG Zhi-gang(冯志刚... to the strain amplitude. The effect of the eutectic phase on damping and the mechanical properties of as-cast hypoeutectic Mg-Ni alloys were also discussed in detail. Key words: Mg-Ni hypoeutectic alloys......
is, the faster the β1 formation is, the shorter the time of transforming to the equilibrium phase β is. The time of β′ phase transforming into β1 phase is the longest during secondary ageing, while that of β1... phase. Key words: Mg-Gd-Y-Zr alloy; secondary ageing; precipitate; heat-resistance Mg-9Gd-4Y-0.6Zr合金的比强度和比模量高以及耐热性好的优点适合制作卫星和飞船等航天器的零部 件[1-2].卫星零部件裸露在太空中的环境温差大,向着太阳面的温度高达200 ℃；卫星在太空中微重力下运行......
and SEM/EDS analysis and was further explained from the ternary phase diagram calculation. The results show that the formation of the secondary phases in Mg-Zn-Y-Zr alloys firmly depends on the mole... that the Mg-Zn-Y alloys containing icosahedral phase (I-phase) as a secondary solidification phase exhibited good mechanical properties at room temperature as well as at elevated temperature. To the reason why......
℃ in N2atmosphere.A small content of SiO2 favored the formation of secondary phase Lu4Si2O7N2,while large content of SiO2 favored the formation of secondary phase Lu2Si2O7 and Si2N2O.Porous Si3N4 ceramics with secondary phase Lu4Si2O7N2 had a flexural strength of 207 MPa,while that with secondary phase Si2N2O and Lu2Si2O7 had lower flexural strength.关键词:......
Evolution of secondary phase particles during deformation of Al-5Ti-1B master alloy and their effect on α-Al grain refinementHong Yu1,Ning Wang2,Renguo Guan1,2,Di Tie2,Zheng Li1,Yanan An1,Yang... and thereby improve their strength and toughness. TiAl3 and TiB2 in Al-5Ti-1B alloy are the main secondary-phase particles for refinement, while the understanding on the effect of their sizes on α-Al grain......
: 10.1107/S1600536811012141. [23] GAFIROV M M, KIRILLOV S A, GOROBETS M I, RABADANOV K S, ATAEV M B, TRETYAKOV D O, AYDEMIROV K M. Phase equilibria and ionic solvation in the lithium tetrafluoroborate...] KIRILLOV S A, GOROBETS M I, TRETYAKOV D O, ATAEV M B, GAFUROV M M. Phase diagrams and conductivity of lithium salt systems in dimethyl sulfoxide, propylene carbonate and dimethyl carbonate [J......
重载齿轮钢的高温性能张国强1,2,董瀚2,王毛球2,赵亚平3,刘荣佩-1(1.云南省昆明市昆明理工大学材料与冶金工程学院2.北京市钢铁研究总院先进钢铁材料技术国家工程研究中心3.宝山钢铁股份有限公司 特殊钢分公司,上海 200940)摘 要:通过Gleeble-1500D热模拟试验机高温拉伸试验,对比研究了17Cr2Ni2 MoVNb和17Cr2Ni2 Mo钢的高温性能.结果表明:因微合金元素V(0.1%,质量分数,下同),Nb(0.036%)产生细晶强化及固溶强化,17Cr2Ni2 MoVNb钢的抗拉强度比1......
