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micro-fins on the finned tube. Micro-pits were left at the surface of the fins, and surface roughness of the finned tube was increased, which resulted in the improvement in the heat transfer... effect of the electrochemical corrosion, the finned tube after this process had an extremely glossy appearance. However, the reduction of surface roughness was slightly unfavorable to the heat exchange......
that Zone B is regenerative section of worn surface, during which small extent wear happens, the roughness of the worn surface decreases, and a combination of scales and worn surface forms. Accordingly... Worn surface characteristics ofCu-based powder metallurgy bake materials for aircraft YAO Ping-ping(姚萍屏), SHENG Hong-chao(盛洪超), XIONG Xiang(熊 翔), HUANG Bai-yun(黄伯云) State Key Laboratory of Powder......
microscopy respectively. For films of about 500nm thick, scans over a 30μm × 30μm area revealed a surface roughness Rα of about 100nm. This relatively large surface roughness is primarily attributed...STRUCTURE AND SURFACE STUDIES OF MgxZn1-xO FILMS GROWN BY PULSED LASER DEPOSITION K.H. Wong1,L. Zhuang1 (1.Department of Applied Physics, The Hong Kong Polytechnic University, Kowloon, Hong Kong......
role in hindering the deformation in the starting creep phase, so that the structural surface creep usually displays the strong surface roughness effect, and so does the latter when the asperities... the creep characteristics of the soft rock structural surface. Its mechanical parameter values will vary owing to the different surface roughness of the structural surface. The parameters of GH, GK......
Mining Co., Ltd., Yichang 443000, China Central South University Press and Springer-Verlag GmbH Germany, part of Springer Nature 2021 Abstract: The wall surface roughness renders a significant impact... of wall-surface roughness on particle-wall collision in a closed flow channel. KENT et al [17] have studied the relationship between urban morphological parameters, i.e., roughness, and wind speed......
and the microstructure evolution of C45 E4 steel was investigated. Refined microstructure and reduced surface roughness were obtained owing to the surface nanocrystallization process. Compared with the ultrasonic... nm. The surface roughness of the C45 E4 steel was reduced to 0.25 μm, and the surface microhardness was dramatically enhanced to 460 HV. The improvement of microstructure and micro-hardness at ambient......
surface; morphological analysis; roughness 1 Introduction Rock masses are generally not intact, but rather are full of many sets of joints and fracture surfaces that are well known to influence...; (5) 4) Arithmetical mean height (Sa) The arithmetical mean height is the mean surface roughness. Its magnitude can be obtained by the following equation:  ......
, TARTAGLINO U, VOLOKITIN A I, TOSATTI E. On the nature of surface roughness with application to contact mechanics, sealing, rubber friction and adhesion [J]. J Phys: Condens Matter, 2005, 17: R1-R62. [11...]. 2009, http://tyrosafe.fehrl.org/. [13] BALA M, JAY R. Computational surface and roughness metrology [M]. London: Springer-Verlag Limited, 2009: 23-29. [14] WHITEHOUSE D. Surfaces and their measurement......
自然科学基金!资助项目 ( 59971 0 35); Effect of ion recoiling process on surface roughness of TiN coating Abstract: The effects of ion recoiling process on surface roughness of precise bearing balls and bonding strength of coating substrate interface were studied. The results show that with increasing N ions energy in the dynamic recoiling process, the surface roughness......
on the surface roughness, the striation formation and the microstructure of the cut section were examined. In addition, an optimal cutting condition, at which the surface roughness is minimized...; cutting parameters; surface roughness; cut and break ratio; surface qualities; optimal cutting condition  ......