YAN Licheng YANG Jinxiu ZHU Lei
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XU Jingyan Shanghai University of Science andTechnology
,
Shanghai
,
ChinaFAN Jinxia Suzhou Teachers′ School
,
Suzhou
,
China YAN Licheng
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Associate Professor
,
Dept.of Chemistry
,
Shanghai University of Science and Technology
,
Shanghai 201800
,
China
金属学报(英文版)
The phase diagrams of molten salt systems KF-LiCI-BaCl_2 and LiCI-LiF-BaCl_2 have been determined by visual polythermal method.The relationship between the change of cation radius of monovalent fluoride and the areas of primary crystal region in the phase diagrams is discussed.
关键词:
phase diagram
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LIU Ping Institute of Aeronautical Material
,
Beijing
,
ChinaXU Changgan Beijing University of Aeronautics and Astronautics
,
Beijing
,
China XU Changgan
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Associate Professor
,
Group 102
,
Beijing University of Aeronautics and Astronautics
,
37 Xueyuan Road
,
Beijing 100083
,
China
金属学报(英文版)
The electrochemical behaviour,which is presented by means of anodic polarization curves.of the component phases in Ti and Ti alloys in aqueous solutions of fluorhydrie acid,chhnhydric acid and amber acid has been investigated.The results indicate that the electrochemical behaviour of the allloys depends upon the composition and the lattice type.The corrosion of x and x′phase in actire region and that of β phase in passive region are the dominant corrosion behaviour.
关键词:
Ti alloy
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HUANG Yuanwei HAN Yong SUN Lanxiang XU Zhiqiang SHI Shengtai(S.T.Shih) Shanghai Institute of Metallurgy
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Academia Sinica
,
Shanghai
,
China HUANG Yuanwei
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Associate Professor
,
Shanghai Institute of Metallurgy
,
Academia Sinica
,
865 Changning Road
,
Shanghai
,
China
金属学报(英文版)
The effects of Y,Ce and La on the sulfidation of alloy Fe-25Cr-40Ni have been investigated. The sulfidation rate of the alloys with RE more than 0.1 wt-% is lower than that of the base alloy.The addition of Y is more effective than La and Ce in lowering the sulfidation rate. Based on the analyses of the structure and composition of the sulfide seales,the sulfidation mechanism of the alloys with RE has been proposed.
关键词:
sulfidation
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YANG Jilian ZHANG Baisheng JIN Lan DING Yongfan YE Chuntang Institute of Atomic Energy
,
Beijing
,
ChinaYANG Yingchang SUN Hong KONG Linshu Peking University
,
Beijing
,
China YANG Jilian
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Associate Professor
,
P.O.Box 275
,
Sub 80
,
Beijing 102413
,
China
金属学报(英文版)
The site occupancies in permanent magnetic alloy Y_2(Fe_(0.95)Al_(0.05))_(14)B has been studied by means of neutron diffraction.The results from profile refinement show that Al enters the tetragonal structure of Nd_2Fe_(14)B and occupies the 4c and 8j_2 sites of the space group P4_2/mnm preferably.The relation between the site occupancies and the magnetic proper- ties is discussed preliminarily.
关键词:
Y_2(Fe_(0.95)Al_(0.05))_(14)B
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ZHOU Lubin ZHANG Jie KANG Mokuang Northwest Polytechnic University
,
Xi'an
,
China ZHOU Lubin
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Associate Professor
,
Dept.of Mater.Sci.and Eng.
,
Northwest Polytechnic University
,
Xi'an
,
China
金属学报(英文版)
The strain fatigue,impact fatigue and rotation beam fatigue behaviour of granular bainitic structure has been studied.The results show that the strain fatigue properties and the impact fatigue properties of granular bainite are superior to that of tempered martensite under the condition that the ultimate tensile strength is equal.The impact.fatigue life increases with in- creasing amount of granular bainite,because the M-A islands might retard the propagation of fatigue crack.The rotation beam fatigue properties of granular hainite are similar to that of tempered martensite.The relationship between.fatigue limit S_f,yield strength σ_y and frac- ture strength S_k may be expressed as S_f=4.651+0.1411(σ_y+S_k)
关键词:
granular bainite
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GUAN Kehong WANG Jun Northeast University of Technology
,
Shenyang
,
China GUAN Kehong
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Associate Professor
,
Dept.of Material Science and Engineering
,
Northeast Univeristy of Technology
,
Shenyang 110006
,
China
金属学报(英文版)
The magnetic moment and the magnetostriction decrease slightly with the increase of total Si+B content.A maximum of the Curie temperature appears at about 25 at.-% of Si+B.The magnetic anisotropy is uninfluential by the content of Si+B,but much influnce by the demagnetization effect of streak.A qualitative explanation of the experimental phenomenon seems to be noted by the aid of the electron transition and structure model of amorphous al- loys.
关键词:
Fe-Si-B alloy
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XIA Yuebo WANG Zhongguang DU Xiukui Institute of Metal Research
,
Academia Sinica
,
Shenyang
,
China XIA Yuebo
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Associate Professor
,
Institute of Metal Research
,
Academia Sinica
,
Shenyang
,
China
金属学报(英文版)
Cyclic deformation in symmetrical push-pull mode was carried out at room temperature in air using a Schenck hydropuls machine.The total strain amplitude which was kept constant dur- ing the test ranged from ±0.004 to±0.012.The 0.2% offset yield stress σ_(0.2f) in tension and σ_(0.2r) in compression and peak stress σ were measured from the stress-strain hysteresis loop at various cycles.The Bauschinger strenghth differential factor(BSDF)was then calcu- lated from σ_(0.2f) and σ_(0.2r).The energy loss △E of each cycle was determined from hysteresis loop areas.These parameters,BSDF,σ and △E,appear to have two distinctively different stages. The dislocation structures were observed using TEM in specimens deformed cyclically,for various cycles.The observation shows that the dislocations pile-up mainly against grain boundaries and there exist large amount of deformation twins.The addition of 0.25 wt-% ni- trogen reduced the stacking fault energy of the alloy significantly.Cross-slip and climb are therefore rather difficult to occur during the cyclic deformation at room temperature,and well-defined dislocation cells and walls can only be seen at the final stage of fatigue.
关键词:
Bausckinger effect
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YANG Qiqin LIU Guankun LIU Zejin Zhongshan University
,
Guangzhou
,
China YANG Qiqin
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Associate Professor
,
Department of Chemistry
,
Zhongshan University
,
Guangzhou
,
China
金属学报(英文版)
The electrochemical alloying of Y-Cu system in molten NaCl-KCl-YCl_3 has been investi- gated.The free energy changes of the formation reactions of the intermetallic compounds,in- cluding YCu_6 ,YCu_4 YCu_2 ,Yfu(973—103 K),were determined by means of electrode potential-time curves of the working electrode after potentiostatic electrolysis.The results in- dicate that the potential-time method is simple and reliable.
关键词:
Y-Cu system
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WANG Shuhe CAI Yuling AN Gang WEN Lishi ZHUANG Yuzhi Institute of Metal Research
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Academia Sinica
,
Shenyang
,
China WANG Shuhe
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Associate Professor
,
Institute of Metal Research
,
Academia Sinica
,
Shenyang 110015
,
China
金属学报(英文版)
The constitution,structure and surface state of the ultrafine iron particles prepared by gas evaporation technique have been investigated by means of X-ray analysis,high-reasolution electron microscopy(HREM)and electron spectroscopy for chemical analysis(ESCA).The results showed that the fine particles are spherical ones of～20 nm in diameter with α-Fe cores and covered by Fe_3O_4 fine crystalline layers of～4 nm thickness.
关键词:
ultrafine particle
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ZHAO Ruirong JIANG Hanying QIN Yihong ZENG Zhenou YANG Jiyue Central South University of Technology
,
Changsha
,
China ZHAO Ruirong
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Associate Professor
,
Dept.of Chemistry
,
Central South University of Technology
,
Changsha 410083
,
China
金属学报(英文版)
The anode reaction and current density of the electrowinning of Sb from jamesonite concen- trate have been investigate.High anodic current density seems to be the major reason for high energy consumption,air pollution by alkaline mists in workshop as well as poor quality of deposition.A series of steps,such as absorption,phase formation,ageing of passivated films etc.,were found to be involved during the anodic passivating process of Fe in NaOH solution. A new anodic material Fe/Ni/Co_3O_4 was developed so as to save the d.c.electric energy over 160 kWh/t of Sb.
关键词:
Sb
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