The surface tensions of pure liquid metals were estimated by using the artificial neural network method. Based on Butler's equation the surface tensions of some liquid Sn-, Ag-, Cu-based binary alloys were calcula...The surface tensions of pure liquid metals were estimated by using the artificial neural network method. Based on Butler's equation the surface tensions of some liquid Sn-, Ag-, Cu-based binary alloys were calculated from surface tensions of pure components and thermodynamic parameters of liquid alloys using a well designed computer program with C++ language, named STCBE. The agreement between calculated values and experimental data was excellent. The surface tensions of binary liquid Cu-RE(RE: Ce, Pr, Nd) alloys at 1400 K were predicted therewith.展开更多
The lack of experimental data and / or limited experimental information concerning both surface and transport properties of liquid alloys often require the prediction of these quantities. An attempt has been made to l...The lack of experimental data and / or limited experimental information concerning both surface and transport properties of liquid alloys often require the prediction of these quantities. An attempt has been made to link the thermophysical properties of a ternary Cu-Sn-Ti system and its binary Cu-Sn, Cu-Ti and SnoTi subsystems with the bulk through the study of the concentration dependence of various thermodynamic, structural, surface and dynamic properties in the frame of the statistical mechanical theory in conjunction with the quasi-lattice theory （QLT）. This formalism provides valuable qualitative insight into mixing processes that occur in molten alloys.展开更多
对球形表面张力贮箱装配精度与表面张力贮箱焊缝熔深及形貌之间的关系进行了研究,得到了电子束焊接工艺规范。该规范为:采用虚焦电子束焊接工艺,聚焦束流虚焦30 m A,焊缝锁底部位宽度0.7 mm,焊接束流23 m A,焊接速度1 200 mm/min,焊接熔...对球形表面张力贮箱装配精度与表面张力贮箱焊缝熔深及形貌之间的关系进行了研究,得到了电子束焊接工艺规范。该规范为:采用虚焦电子束焊接工艺,聚焦束流虚焦30 m A,焊缝锁底部位宽度0.7 mm,焊接束流23 m A,焊接速度1 200 mm/min,焊接熔深2.4~3.3 mm。采用该规范焊接的表面张力贮箱通过了振动、液压、声发射等试验考核,表面张力贮箱满足设计要求,并通过了地面热试车考核。展开更多
文摘The surface tensions of pure liquid metals were estimated by using the artificial neural network method. Based on Butler's equation the surface tensions of some liquid Sn-, Ag-, Cu-based binary alloys were calculated from surface tensions of pure components and thermodynamic parameters of liquid alloys using a well designed computer program with C++ language, named STCBE. The agreement between calculated values and experimental data was excellent. The surface tensions of binary liquid Cu-RE(RE: Ce, Pr, Nd) alloys at 1400 K were predicted therewith.
基金This work was financially supported by THERMOLAB - ESA MAP PROJECT, Contract No. AO-99-022. A part of this work was performed in the framework of the E.C. action COST 531 project: "Lead-free solder materials".
文摘The lack of experimental data and / or limited experimental information concerning both surface and transport properties of liquid alloys often require the prediction of these quantities. An attempt has been made to link the thermophysical properties of a ternary Cu-Sn-Ti system and its binary Cu-Sn, Cu-Ti and SnoTi subsystems with the bulk through the study of the concentration dependence of various thermodynamic, structural, surface and dynamic properties in the frame of the statistical mechanical theory in conjunction with the quasi-lattice theory （QLT）. This formalism provides valuable qualitative insight into mixing processes that occur in molten alloys.
文摘对球形表面张力贮箱装配精度与表面张力贮箱焊缝熔深及形貌之间的关系进行了研究,得到了电子束焊接工艺规范。该规范为:采用虚焦电子束焊接工艺,聚焦束流虚焦30 m A,焊缝锁底部位宽度0.7 mm,焊接束流23 m A,焊接速度1 200 mm/min,焊接熔深2.4~3.3 mm。采用该规范焊接的表面张力贮箱通过了振动、液压、声发射等试验考核,表面张力贮箱满足设计要求,并通过了地面热试车考核。
