枝晶间距

过冷Ni（50）Cu（50）合金的二次枝晶间距

Secondary arm spacing of undercooled ni_ ( 50 ) cu_ ( 50 ) alloy

当稀土元素La的添加量为0.31%时，同一系列的一次枝晶间距达到最小值410.4。

When we put in 0.31 % La , its primary dendrite spacing obtained the minimum 410.4395 μ m at the same series .

Ti-Al合金定向凝固过程中胞/枝晶间距选择的计算机模拟

Numerical Simulation of Cellular / Dendrite Arm Spacing Selection During Unidirectional Solidification of Ti-Al Alloy

得出这种工艺下一次枝晶间距λ1与工艺参数即温度梯度GL和凝固速率V的对应关系，在此工艺参数下获得良好的定向组织。

The relation between the primary arm spacing λ 1 and processing parameter-temperature gradient GL and solidification rate V has been inferred . The preferable directional microstructure is obtained under this process .

用数学回归的方法得到了AZ91镁合金的凝固冷却速度与二次枝晶间距的定量关系式。

The quantitative relationship between secondary dendrite arm spacing and solidification cooling rate of AZ91 was obtained by regressive analysis .

结果表明，凝固速度显著影响稀土对共晶硅相的变质效果，稀土减小α（Al）二次枝晶间距，并使合金铸态硬度提高。

The results reveal that the solidification rate has a noticeable influence on the effect of modification of rare earth on eutectic Si phase . Rare earth can decrease the α( Al ) secondary dendrite arm spacings and increase the cast hardness of this alloy .

在15min～60min范围内，随保温时间的延长，二次枝晶间距显著增大；但保温时间的延长对其铸态组织均匀性以及晶粒尺寸的大小的影响并不明显。

The secondary dendrite spacing grows markedly with the increase of holding time in the range of 15min ~ 60min , but the effects on dendrite nets and grain size are not obviously .

本文采用差热分析方法研究DTA曲线特征参数、凝固开始温度和冷却速率对二次枝晶间距λDAS的影响，同时使用IAS-4图像分析系统分析了合金的微观组织。

The effect of characteristic parameters on differential thermal analysis curve , solidification setup temperature and cooling rate on dendrite arm space (λ DAS ) was studied , and IAS-4 Image Analysis System was used for microstructural examination .

用IAS－4图像分析系统定量地测定了高温合金激光表面熔铸Co基合金涂层添加不同稀土含量的组织中二次枝晶间距变化，并对其影响规律作了定性分析。

With IAS 4 Image Analysis System , the distances between secondary dendrites in the structures of Co based alloy coatings , laser surface melt cast on the high temperature alloys with different contents of rare earth , were determined . Qualitative analysis of the effect regularities was made .

此外，如果计算中考虑Thomson效应，电流对枝晶间距的影响规律并没有改变，只是相应电流的取值范围变窄了（即J1减小）。

And the experiment results verified this too . Furthermore , if the Thomson effect is considered during calculation , the rule of current affecting dendrite spacing does not has change but the span of current choosing becomes smaller ( i.e. J1 reduced ) .

采用定向凝固连续铸造技术成功制备了纤维增强的自生复合Cu-Cr合金电车线线坯，并对自生复合Cu-Cr合金的定向凝固特性，包括组织形态、枝晶间距及纤维长度等，作了详细的研究。

The in situ composite cable ingots of the alloy Cu Cr have been produced by a directional solidification and continuous casting process . The directional solidification properties of the alloy Cu Cr , such as microstructure , primary dendritic spacing , and axial length of crystal , are studied .

冷铁对铝合金铸件二次枝晶间距的影响

Effect of Chill on Secondary Dendrite Arm Spacing of Aluminum Alloy Casting

稀土铝合金的枝晶间距

Dendrite Arm Spacings in Aluminium Alloys with Rare Earth Additions

枝晶间距是重要的铸态组织参数。

Dendrite arm spacings is one of the important as-cast structural parameters .

一次枝晶间距的数值统计模型定向凝固一次枝晶间距的历史相关性

History dependence of primary dendritic spacing during unidirectional solidification

电流对Al-4.5%Cu合金定向凝固枝晶间距的影响

Effect of Electric Current on Dendrite Spacing During Al-4.5 % Cu Alloy Directional Solidification

当各向异性增大时，二次枝晶间距随之增大，但二次枝晶幅值则随之减小。

The amplitude of the secondary branch decreases with the increase of anisotropic coefficient .

电场作用下的枝晶间距压力对二次枝晶间距没有明显的影响；

There is no obvious effect of pressure on decreasing secondary dendrite arm spacing .

而二次枝晶间距λ2随凝固速率的增加一直减小。

The second dendrite spacing λ _2 decreases with increase of the solidification rates .

晶体取向对单晶高温合金一次枝晶间距的影响

Influence of crystal orientation on the primary dendrite arm spacing of a single crystal superalloy

高温合金定向凝固枝晶间距与冷却速率的关系

The relationship between dendritic arm spacings and cooling rate of superalloy under the directional solidification

给出了三次枝晶间距与工艺参数即温度梯度和生长速度之间的指数衰减关系。

The relationship between the dendrite spacing and processing parameters i.e. temperature gradient and growth velocity have been defined .

一次枝晶间距与二次枝晶间距的比值大小对三次枝晶的形成有直接的影响；

The ratio of primary dendrite arm spacing to secondary arm spacing has direct influence on the formation of tertiary dendrite .

胞、枝晶间距随激光束移动速度的增加而显著减小；

The primary dendrite arm spacing or cell spacing is very small and decreases considerably with the increasing beam scaning speed .

初生α相的一次枝晶间距λ1在胞晶生长阶段逐渐增大，而在枝晶生长阶段，λ1又逐渐减小；

The first dendrite spacing λ _1 of primary α phase increases gradually during the cellular growth , and decreases during the dendrite growth .

通过数学模拟计算凝固过程的温度场，进而计算二次枝晶间距是获得合理凝固组织的有效手段。

It 's an effective method to obtain reasonable solidification structure by computing temperature field and the secondary dendrite arm spacing using mathematical model .

在凝固速率815μm／s时，枝晶间距（λ1，λ2）为最小，而冷却速率为最大。

At solidifying rate 815 μ m / s , two kinds of dendritic arm space were minimum but the cooling rate was maximum .

探讨了铸坯中一次枝晶间距的变化规律及其“鼓肚”量对枝晶间距的影响。

The variation rule of the primary dendritic spacing in the casting blanks and the effect of the bulge size on dendritic spacing were studied .

通过测定二次枝晶间距来预测铸件的抗拉性能是可行的，但是孔洞率对抗拉强度的影响不可忽视。

It is feasible to forecast the casting UTS by measuring DAS , but the effect of hole ratio on UTS should not be neglected .

分析了合金中相的种类、形态、分布，以及生长速度对固液界面形态、凝固微观组织形成和演化的影响。并测量了凝固微观组织特征尺度如胞/枝晶间距等。

Effects of pulling velocity on solid / liquid interface morphology , microstructure evolution and characteristic scales such as cellular / dendritic spacing have been investigated .