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treatment temperatures on optical properties Optical properties of the ITO films after heat treatment at different temperatures were investigated by UV-VIS spectrometer. High transparency for the ITO films... Effects of heat treatment on morphological, optical and electrical properties of ITO films by sol-gel technique LI Zhi-hua(李芝华), KE Yu-peng(柯于鹏), REN Dong-yan(任冬燕) School of Materials Science......
of heat treatment process, and thermal stability at high temperature is the key factor for heat treatment process. Judging by thermal stability for the alloy exposed at 500 and 550 ℃ for 100 h... Effect of heat treatment on thermal stability of Ti40 alloy XIN She-wei(辛社伟)1, 2, ZHAO Yong-qing(赵永庆)1,2, ZENG Wei-dong(曾卫东)1 1. School of Materials, Northwestern Polytechnical University, Xi......
→ granule medium internal high pressure forming → artificial aging. During this process, the mechanical properties of AA6061 tube can be adjusted by heat treatment to satisfy the process requirements... increases by 25.5% and the material properties of formed tube reach the performances of raw material. Key words: AA6061 alloy; internal high pressure forming; heat treatment; strengthening mechanism 1......
Surface treatment to improve corrosion resistance of Al plate heat exchangers Jong-Soon KIM, Tae-Ho KANG, In-Kwan KIM Department of Mechanical Engineering, Pukyong National University, Busan... specimen is achieved without thermal degradation. It validates the ability of the aluminum plate heat exchangers with surface treatment to enhance the corrosion resistance. Present work is performed......
, and the deformation of heat pipe is due to high vapor pressure. In practical application, the heat pipe is embedded into a refractory- composite structure and this could avoid the deformation. In order to make... material of heat pipe, or the heat pipe made of refractory metal can be embedded into a refractory-composite structure. The wick with high capillary pressure and low flow resistance as well......
to achieve the needlessness of heat treatment after cold forging. One possible material is given by high nitrogen steels like steel 1.3815 (X8CrMnN19-19). Due to the high strain hardening of these materials... be produced. At the moment for the process the heat treatable steel 1.5525 is used. This material will be substituted by the high nitrogen steel 1.3815 to overcome the problem of heat treatment of steel......
of High Temperature Gas Dynamics, Institute of Mechanics,Chinese Academy of Sciences, Beijing 100190, China;2. Citic Heavy Industries Co., Ltd., Luoyang 471039, China)Abstract:Convection heat transfer... convection heat transfer coefficient is in the range of 400-1800 W/(m3·°C). Air pressure drop in sinter layer increases with the increase of normal superficial velocity, as well as with the rise of air......
Effect of holding time on microstructure of Mg-9Al-1Si alloy during semisolid isothermal heat treatment MA Guo-rui(马国睿), LI Xin-lin(李新林), LI Qing-fen(李庆芬) Center for Biomedical... microstructure can be produced by the semi-solid isothermal heat treatment. With holding time varying from 5 to 30 min, the volume fraction of liquid is gradually enlarged from 29.3% to 38.6......
-independent logarithmic decrement for the specimens annealed at higher temperatures is a little lower than that for as-cast specimen, and it increases with increasing temperature of heat treatment. Microstructure changes due to heat treatment are responsible for changes of the logarithmic decrement. Key words: AZ61 magnesium alloy; heat treatment; damping; dislocation ......
