共搜索到3500条信息，每页显示10条信息，共350页。用时：0小时0分1秒60毫秒
of straight annealing twins can be found. When the aging time is 8 h (Fig. 2(b)), there are two morphologies of d phases. The dominant morphologies are short needle-shaped which distribute at grain boundaries, and only a small number of spherical d phases precipitate within grains. As the aging time is increased to 12 h (Fig. 2(c)), the short needle-shaped d phases extend from grain boundaries into grain......
specimens were processed into cylinder with diameter of 8 mm and height of 12 mm. Heat treatment prior to isothermal compressing was applied by annealing at 573 K for 2 h in order to remove residual stress... that lower strain rate and higher temperature are beneficial to the occurrence of DRX. That is due to the fact that low strain rate and high temperature provide longer time for energy accumulation and higher......
that precipitates as Ni3Nb or δ [19,26]. They are stable at the ambient temperature. These needle-shaped precipitates have nucleated and grown in the interdendritic regions. The time-temperature-transformation..., EGBEWANDE A T, ZHANG H R, OJO O A. Single pass laser joining of Inconel 718 superalloy with filler [J]. Materials Science and Technology, 2011, 27: 268-274. [26] QIAN M, LIPPOLD J C. The effect of annealing......
techniques and clustering algorithms, such as genetic algorithm, extension theory, simulated annealing algorithm, fuzzy number diagram. GU and SOSALE [8], SAND [9], YU [10] made a thorough study... configuration list. At the same time, valve module attribute table is built, which includes module code, module name, module serial number, module main attribute and other parameters. Among them, the module......
the potential of accruing additional benefits or avoiding some of the drawbacks of stop-skipping services. Key words: bus transit; cost; travel time; service patterns; optimization; genetic algorithm 1... drawbacks of bus service is frequent stops, which increase travel time and make the service unattractive. Stop-skipping (or express) service, allowing some buses to skip certain stops, can reduce......
Trans. Nonferrous Met. Soc. China 26(2016) 2263-2275 Effect of aging time on precipitation behavior, mechanical and corrosion properties of a novel Al-Zn-Mg-Sc-Zr alloy Bo LI1, Qing-lin PAN2, Cong... at different time were studied by optical microscopy (OM), scanning electron microscopy (SEM), transmission electron microscopy (TEM), tensile tests, potentiodynamic polarization and electrochemical......
annealing phenomena [M]. 2nd ed. Oxford: Pergamon, 2004. [50] MIRZADEH H, NAJAFIZADEH A, MOAZENY M. Flow curve analysis of 17-4PH stainless steel under hot compression test [J]. Metallurgical......
of the movement. A bacterium can swim (swim for a short time) or tumble, and shift between these two positions during its life-span. Figure 5 shows the bacterium movement [23]. The flowchart of BFO process.... JIANG et al [15] proposed an algorithm for reconfiguration and capacitor control in order to reduce active power losses in distribution systems. The reconfiguration is performed via simulated annealing......
systems have been operated radically to facilitate their protection scheme and reduce the short circuit current. Therefore, each load point is fed by a route through the system components to the substation...], a reconfiguration method was proposed using a simulated annealing (SA) technique. In Ref. [5], different branch exchange techniques have been proposed for network reconfiguration. In Ref. [6], an automatic......
on the modeling of mechanical properties of the armor grade Al-Zn-Mg alloy. It is worth mentioning that the study of mechanical properties is a labor incentive and time consuming process... varied to develop FSW joints by one factor at a time approach. 2.4 Mechanical testing The soundness of the weld joints was checked by three point face and root bend test as per ASTM E290-09 guideline......
