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Trans. Nonferrous Met. Soc. China 31(2021) 1885-1901 Effects of single- and multi-stage solid solution treatments on microstructure and properties of as-extruded AA7055 helical profile Cun-sheng..., Ji’nan 250061, China Received 28 July 2020; accepted 28 January 2021 Abstract: The effects of single-stage solution treatment (SST), enhanced solution treatment (EST), high-temperature pre......
J. Cent. South Univ. (2021) 28: 2360-2374 DOI: https://doi.org/10.1007/s11771-021-4775-x Risk assessment of floor water inrush in coal mines based on MFIM-TOPSIS variable weight model ZHANG Guan-da... of floor water inrush in coal mines. Based on the MFIM, the interaction between seven evaluation indices, including the confined water pressure, water supply condition and aquifer water yield property......
accumulated in the rock mass has been regarded as the most important factor affecting the strainburst. COOK [8] initially proposed a method to predict rockburst based on the excessive energy. SALAMON [9] proposed an idea of energy transition during the mining operation. KAISER et al [2] developed the rockburst support countermeasure based on energy release approaches. Many researchers studied......
of soil under thermal mechanical coupling and its mathematical description. Firstly, based on the general function, a unified primary and secondary consolidation model of saturated soil considering... plastic strain, and developed the first thermal constitutive model of soil. Since then, scholars from worldwide have made a series of improvements [17-21]. Based on the theory of particle fluid dynamics......
): 155-169. [26] MAITI S K, SMITH R A. Comparison of the criteria for mixed model brittle fracture based on the preinstability stress-strain field, Part Ⅱ: Pure shear and uniaxial compressive loading[J]. Int J...; 俊, 郎福元, 王 珉, 李建华, 刘 展. 基于统一强度理论的复合型裂纹断裂准则[J]. 机械强度, 2003, 25(3): 347-351. GONG Jun, LANG Fu-yuan, WANG Min, LI Jian-hua, LIU Zhan. Mixed mode fracture criteria based on unified strength......
the use of different materials in a single component/ structure [1]. Al and Cu possess good electrical and thermal conductivities and they are widely used for thermal and electrical applications. Al... in the stir zone. These may be seen as single or in line up to 9 mm in length. Too small tool plunge depth [112], small tool tilt angle [38,74,91] and very low rotational speed [113] are the main......
to decrease thermal resistance and achieve a higher heat transfer capability. In the present article, a comprehensive literature review is performed on the nanofluids’ applications in heat pipes. Based... performance in energy systems [20, 21]. Nanotechnology has been widely investigated in solar-based thermal systems in order to boost up the system efficiency [22, 23]. Nanofluids are obtained by dispersion......
. At present, different TBM types with various excavation and support features, e.g., gripper, single shield, double shield, hybrid and crossover TBMs, are available to cope with different rock mass... are more crack and wear resistant by the use of flex-acceptable materials and welding techniques. Based on a detailed geotechnical baseline report, the cutterhead design can be optimized by conducting......
) Abstract: Al-Cu-Mg-Ag alloys based on the Al-Cu-Mg system are promising materials for new generation supersonic passenger aircraft. The common precipitates include θ′, S′ and Ω precipitates. Ω...饱和固溶体→Ω相→θ相. 综合铝合金析出强化相与析出序?,限于篇幅有限,文章没有对Al-Cu系合金中可能各析出相的晶体学进行比较分析,只是对相关文献报道的析出相晶体结构和晶体学参数进行整理,如表2所示. 表2 Al-Cu系合金析出相成分及晶体结构 Table 2 Precipitates composition and crystal structure......
limits, and can be used in place of traditional solvent-based electrolytes. It is prone to volatility, flammability, leakage, and corrosion. It has been widely and successfully used...-workers[14] determined the solubility of UO3 in imidalozium-based chloroaluminate melts to be 24.58 mmol at 65 ℃. The dissolution of V2O5 in (Emim) chloroaluminate ionic liquids was studied by BELL et......