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by T1, T2 and T3 with the diameter of 3 mm were centrally positioned on the lateral surface of each sample. The distances between the quenching surface and the three thermocouples are 3, 10 and 20 mm......
. In the first series of analyses (T1), only the thickness of the sand cushion was changed. The simulations of 4 different thicknesses (e.g., 25, 50, 75 and 100 cm) of sand cushion were to analyze......
; (7) whereis the loading rate of coal sample; t0 is the initial time of the interval; t1 is the end time of the interval; σ(t0) is the stress value corresponding to time t0; and σ(t1) is the stress value corresponding to time t1. The stress changes with time are shown in Figure 5. During the period from 100 to 150 μs......
is featured by cracked silicide and saturated (oxygen) Nbss matrix is formed in the corroded alloy and oxidized alloy (Figs. 5(a), 8(a) and Step t1). Due to the evaporation of SO3, SO2, Cl2 and O2 via......
固溶度极限为4.2%(约14%),前期主要通过提高主合金化元素Li含量至2%以上甚至更高,增加时效析出相δ′相(Al3Li)的分数[5-6]；2) 适当提高Al-Cu-Li系铝锂合金中的Cu含量,析出新的时效强化相T1相(Al2CuLi),产生δ′和T1相的复合强化[7]. 第二个成分设计阶段是Mg+X(X=无,Ag或Zn)微合金化阶段.20世纪80年代末,澳大利亚学者POLMEAR等在...,开发了一种新型超高强铝锂合金[10-13]. 1 Al-Cu-Li系铝锂合金中主要时效析出相的强化效果 作为可热处理强化铝合金,Al-Cu-Li系铝锂合金的主要时效强化相包括T1相,δ′相和θ′相 (Al2Cu).T1相为平衡相,晶体结构为密排六方结构,其晶格常数分别为:a=0.4965 nm,c=0.9345 nm[14].T1相呈圆盘状,在铝基体{111}Al面析出,与铝基体半共格......
