合金的

The oxidation behavior of these alloys was discussed in terms of the low solubility of niobium in cobalt and the microstructure of the alloys and the oxide scales.

从合金的和所生成氧化膜的显微组织特征，尤其是从铌在钴中溶解度低的角度，对合金的氧化行为进行了讨论。

Gscoh gs fsR, gscoh as the solid fraction when the formation of the continuous dendrite framework, fsR as the maximum solid fraction after recalescence,βs as the solidification shrinkage of the primary phase,μas the dynamic viscosity of the liquid, a as the length of L/S coexistence zone,λ2 as the secondary dendrite arm spacing, and tf as the total solidification time. High temperature recovery and recrystallization taking place in these fragments during further cooling results in the further grain size decrease.

本文通过对过冷DD3高温合金再辉过程中累积应力的计算，得到作用于初生枝晶的累积应力σs，可表示为：式中，gl是液相体积分数，gs是固相体积分数，gscoh是连续枝晶网络形成点对应的固相分数，fsR是再辉结束后固相分数，βs是快速凝固中液固收缩率，μ为液态合金的动力学粘度，a是再辉中液固共存区长度，λ2是枝晶二次间距，tf是总凝固时间，即再辉时间。

Through the thermodynamic calculation of the reaction that aluminum and magnesium reduce anhydrous scandium chloride molten salt to prepare aluminium-magnesium-scandium master alloy, we got that the standard equilibrium constant of the reaction is 1.074 ×10~(19), and the experimental equilibrium constant of it is approximately 6.874 × 10~(14)under around 1200 K and 1 standard pressure, which demonstrate that the reaction can take place and proceed thoroughly.

通过铝镁热还原无水氯化钪熔盐制备铝镁钪中间合金反应的热力学计算，得出：在1200K左右温度，1标准大气压下，该反应的标准平衡常数K为1.074×10~(19)，经验平衡常数K′约为6.874×10~(14)，这说明铝镁热还原无水氯化钪熔盐法制备铝镁钪中间合金的反应能够进行，而且进行的很彻底。

An Al-6Mg-0.4 alloy was prepared by semicontinuous ingot metallurgy method. In order to determine the best thermal process technics, the thermoplastic of Al-6Mg casted alloy was studied. The tensile properties of the casted sample were tested at 250, 300, 350, 400, 450, 475 and 500 ℃, respectively, after homogenizing annealing treatment. The high temperature deformation and fracture behavior of the alloy was investigated by scanning electron microscopy and transmission electron microscopy.

摘 要：采用半连续铸锭冶金法制备一种成分为Al-6Mg-0.4的合金，铸锭样品经均匀化退火后，测试其在250，300，350，400，450，475和500 ℃时的瞬时拉伸力学性能，借助扫描电镜和透射电镜的观察和分析，研究该合金的高温变形及断裂行为。

The influence of low-frequency electromagnetic field on microstructure and morphology of primary Si particles of Al-19.2% Si alloy ingot specimens prepared by semicontinuous casting process was investigated with electronic optical microscopy, where the specimens were taken from different parts of the cast to which different electromagnetic fields are applied.

采用低频电磁半连续铸造技术制备Al-19.2% Si合金铸锭，利用电子光学显微镜对铸锭的显微组织进行分析比较，研究了电磁场强度和频率对初生硅颗粒形貌的影响；利用测温技术对合金的凝固过程进行监测，研究低频电磁场对凝固前沿温度场的影响。

The results of weight-loss tests of many magnesium alloys containing different concentration Al and Rare earth elements showed that the effect by only adding aluminum to improve the corrosion resistance of magnesium alloys in sodium chloride solution was unstable.

不同铝和稀土元素含量的镁合金的失重实验结果发现铝元素对于改善镁合金在NaCl溶液中耐腐蚀性能的作用是不稳定的。

The results show that it is difficult to melt Zr into the alloys,but it makes grain refinement and formation of Mg_2Ni phase of the alloy to improve hydrogen absorption performance.The PCT results show that hydrogen absorpt...

利用PCT测试仪测定了合金的储氢性能，结果表明：添加Zr元素的添加能有效降低Mg2Ni的吸放氢温度，并能有效提高提高合金的吸氢量，最高吸氢量达到4.91wt%。

Many research works have shown that the microstructural control of TiAl alloys have an important influence on their mechanical properties, and also found that the grain size, the interlamellar spacing and the α〓/γ volume fraction of the microstructural features are the key factors of microstructural control.

已有的研究确定了TiAl合金的显微组织控制对其力学性能有着重大的影响，提出了TiAl合金的显微组织中晶粒大小，片层间距和α〓/γ相比例等是组织控制的主要因素。

It was found that percentage recovery decreases with the increasing of prestrain and increases with the increasing of annealing temperature and there is a higher percentage recovery when up to 600℃ of annealing temperature.

实验表明，合金的形状回复率随预变形量的增加而减小；形状回复率随回复温度的升高而增大，且在600℃左右达到最大值；热-机械训练可以明显提高合金的形状记忆效应。

The effect of training, prestrain amount and recovery annealing temperature on the shape memory effect, the absolute shape recovery ratio , and the superelasticity of Fe14Mn6Si9Cr5Ni alloy is studied.

研究了训练、预应变量和退火温度对Fe14Mn6Si9Cr5Ni合金的形状记忆效应、绝对形状回复率和超弹性的影响，测定了合金的蠕变和应力松驰特性，讨论了降温ε马氏体对形状记忆效应的间接贡献。

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷