凝固

One, two and three recalescence events in the solidification of highly undercooled Ni_(68)B_(21)Si_(11) alloy melt and the conditions of undercooled together with the effect on solidification morphologies were revealed.

发现深过冷Ni_(68)B_(21)Si_(11)合金液形核过程中的多次再辉现象，揭示了二次和三次再辉的过冷条件，以及对凝固组织的影响。

It can be concluded that there are twice recalescence in solidification process of Cu-20%Pb hypomonotectic alloy with undercooling in the range of 0K to 238K.

合金熔体深过冷凝固行为在固溶体类合金[1，2]、共晶类合金[3，4]、包晶类合金[5，6]和偏晶类合金等方面都有研究。

For single phase solid solution Cu—Ni alloy, an apparent nucleation stage exists during its supercooling solidification, which is different from the traditional view combining nucleation into recalescence crystal growth.

3对单相固熔体Cu—Ni合金而言，其深过冷凝固过程中存在着明显的形核阶段，区别于传统观点将形核过程并入再辉阶段晶粒长大过程的看法。

The concept of secondary recalescence is outlined. It is pointed out that the inflection point occurred during recalesence stage only indecates the heat requirement for dendrite remelting, while the inflection point resulted from heat release during new phase formation can be regarded as a strict secondary recalescence.

提出在冷却曲线的再辉阶段出现的温度变化拐点，只是表明枝晶熔断过程对热量的需求，只有在快速凝固阶段的冷却曲线上出现的由于新相形成而释放出潜热导致的温度变化拐点才算得上严格意义上的二次再辉。

After analysing the flight, cooling and undercooled solidification of multistage atomized droplets, this paper adopts Newtonial cooling, highly undercooled heterogeneous nucleation and steadystate continuous growth model to calculate and simulate numerically the thermal history of droplets and effect of main atomization process parameters during multistage atomization. The results indicated that large undercooling occur mainly during later stage of multistage atomization while recalescence and rapid quenching occur mainly during forced cooling stage.

在分析多级雾化过程雾化微滴的飞行冷却和过冷凝固特点及规律的基础上，本文采用了牛顿冷却、大过冷非均匀形核及稳态连续生长模型，对纯铝多级雾化过程中微滴热历史以及主要雾化工艺参数对其的影响作用进行了数值分析和计算，结果表明：大过冷主要是在多级雾化后期形成的，再辉和急冷则主要发生在强制冷却阶段。

Dendrite cluster mode of growth occurs during recalescence if Ni-32. 5%Sn eutectic alloy is undercooled by larger than 10k or 〓 and 〓 alloys are undercooled by less than 480k and 110k respectively.

共晶成分的Ni-32.5wt％Sn（△T大于10k）、非共晶成分的〓（△T小于480k）和〓（过冷度小于110k）等合金再辉过程中以枝晶簇方式凝固。

The results show that the cracks on the superalloy blades are resulted from surface recrystallization.

研究结果表明，定向凝固合金叶片的裂纹是由于叶片表面的再结晶而导致的。

The results indicated that microstructures exhibited characters of rapid solidification after the remelt of the alloy coating.

结果表明，该合金粉末喷焊层的重熔过程具有快速凝固的特征。

In order to investigate the influence of surface tension gradient driven convection on solidification behavior of alloys under microgravity, remelt and solidification of Al-Al〓Ni eutectic alloys, which have characteristics of directional growth along temperature gradient, were carried out on board Chinese retrievable satellite.

利用我国返回式科学实验卫星搭载的梯度炉和Al-Al〓Ni共晶合金定向生长的特点，研究了与重力无关的表面张力驱动对流（Marangoni对流）对合金凝固行为的影响，在空间微重力下获得了弯曲的双涡放射状共晶组织。

These sudden congealments in the state of revery, which a single word suffices to evoke, do occur.

在神魂颠倒的情况下，一两个字足使那种急速凝固状态出现。

But we don't care about Battlegrounds.

但我们并不在乎沙场中的显露。

Ah! don't mention it, the butcher's shop is a horror.

啊！不用提了。提到肉，真是糟透了。