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Effect of Rare Earths on Diffusion Coefficient and Transfer Coefficient of Carbon during Carburizing 刘志儒1,阎牧夫1 (1.School of Materials Science and Engineering, Harbin Institute of Technology,) Abstract:The diffusion coefficient of carbon in surface layer of steel-20 rare earth carburized at 880 ℃ and 900 ℃ for 8 h was calculated by substituting the measured layer depths into the diffusion......
Introduction Ceramic coatings deposited by plasma spray are widely used to improve the high-temperature oxidation resistance and wear resistance of metallic materials[1-2]. The lamellar grains in air... Ultrasonic characterization of modified Cr2O3 coatings by reflection coefficient spectroscopy LI Ji-cheng(李继承)1, LIN Li (林 莉)1, LI Xi-meng(李喜孟)1, LI Guang(李 光)2, LEI Ming-kai(雷明凯)3 1......
J. Cent. South Univ. Technol. (2011) 18: 2115-2121 DOI: 10.1007/s11771-011-0951-8 Earth pressure coefficient at rest during secondary compression ZHAO Xiao-dong(赵晓东)1, ZHOU Guo-qing(周国庆)1, SHANG... the earth pressure coefficient at rest (K0) at higher consolidation pressures during secondary compression, a series of K0 tests for saturated reconstituted clay were conducted. The results indicate......
produce different lubrication effects and their optimal application temperature will be different. Three different lubricants were used to study the effects of friction coefficient on warm compaction... cycle. Therefore, the optimal lubricant should have the following properties: 1) low friction coefficient; 2) a moderate melting temperature range; 3) no abrupt vaporization or dissociation temperature......
Aging Coefficient, Creep Coefficient and Extrapolating Aging Coefficient from Short Term Test for Sealed ConcreteShrestha K MCollege of Civil Engineering, Fuzhou University摘 要:Aging coefficient and creep coefficient are important parameters for creep analysis of any structure. With the aim to obtain those parameters, an experimental investigation......
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J. Cent. South Univ. (2017) 24: 341-352 DOI: 10.1007/s11171-017-3436-1 Secondary settlement estimation in surcharge preload subject to time effect of secondary consolidation coefficient HU Ya-yuan(胡... underestimation in surcharge preload engineering, a study based on Bjerrum’s creep diagram and the tangent slope definition of secondary consolidation coefficient was carried out to analyze the time effect......
Superplastic forming of Ti6Al4V alloy using ZrO2-TiO2 ceramic die with adjustable linear thermal expansion coefficient JIANG Shao-song(蒋少松), ZHANG Kai-feng(张凯峰) National Key Laboratory...; Abstract: Firstly, the relation between the coefficient of thermal expansion(CTE......
