二次枝晶臂间距变化不明显。
However, the second dendrite arm spacing (SDAS) changes little.
采用相场方法模拟纯物质三维枝晶生长。
The phase-field method is applied to simulate dendritic growth in the three-dimensional space.
二次枝晶在冷却过程中粗化，并竞争生长。
The secondary dendrites become coarse, and grow competitively during cooling.
结果表明：隔板较薄的电池容易产生枝晶短路。
The results indicated that the battery assembled by thinner separator was susceptible to dendrite short circuit.
白亮带处的枝晶生长方向改变而生成弯曲的枝晶。
The dendrite growth direction is changed and dendrites are curved in the zone of white band.
此外，纯锂趋于形成金属细丝，或枝晶，导致短路。
Also, pure lithium tends to form metal filaments, or dendrites, that cause short circuits.
随着锡离子添加剂含量的增加，锌枝晶被显著抑制。
With increasing tin ion additive, zinc dendrite was dramatically inhibited.
等轴非枝晶的形成机制被认为是“包晶反应机制”。
The Equiaxed non-dendrites are considered to form through a peritectic reaction mechanism.
在枝晶生长过程中枝晶尖端的浓度和温度的梯度最大；
The solute and temperature gradients in the tip are the highest.
同时，过大的界面厚度会导致主枝晶和二次枝晶粗化。
Meanwhile, too great interface thickness would coarsen the secondary arms.
研究枝晶二次臂间距对于提高铸件力学性能有重要意义。
Research on secondary arm spacing has important significance for improving the mechanical properties of castings.
模型除了描述了晶粒的生长，同时还描述了枝晶臂的粗化。
The improved model not only describes grain growth, but also describes coarsening of dendrite arms.
相场法可以直接模拟金属凝固过程中枝晶生长的形成过程。
The phase field method can directly simulate the dendrite growth during metal solidification.
岩浆熔体的性质和生产工艺深刻影响着辉石枝晶生长演变。
The property of magma melt and producing technology are profoundly influence on the growth and development of pyroxene dendrite.
试验分析比较了上述三种铝合金的半固态非枝晶组织特点。
The characteristics of semi solid non dendritic microstructure of the three kinds of aluminum alloy were compared by experimental analysis.
半固态金属成形技术的关键是制备非枝晶结构的半固态金属材料。
For semi solid metal forming, it is crucial to produce semi solid metal materials that have non dendritic structure.
改善中心偏析关键在于控制液相穴末端的枝晶间液相的流动状况。
The control of the interdendritic flow at the end of the liquid pool is important to prevent the centreline segregation.
研究了初始晶核半径、空间步长和各向异性对纯铝枝晶生长的影响。
The dependence of aluminum dendrite growth on the initial nucleus radius, space step and anisotropy is investigated.
多元合金的深过冷与快速枝晶生长是材料科学领域的重要研究课题。
The rapid dendrite growth of multicomponent alloys is an important research subject in the field of materials science.
研究了差压铸造不同工艺参数对A357合金二次枝晶间距的影响。
The effect of counter-pressure casting parameters on secondary dendrite arm spacing (SDAS)of A357 alloy was studied.
并且随着对流强度的加大，一次枝晶间距降低，二次枝晶的生长被抑制。
Meanwhile, the primary dendrite spacing is decreased and the secondary dendrite branches are restrained.
根据等轴枝晶生长过程的物理机制，改进了等轴枝晶生长的溶质扩散模型。
In the light of physical mechanism of equiaxed dendrite growth, solute diffusion models for equiaxed growth was improved.
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.
用胞元自动机(CA)方法模拟了枝晶生长、界面扰动以及分枝的竞争演化。
Cellular automaton (CA) method was applied to simulate dendritic growth, perturbation at the interface and the branching mechanism.
研究了应变诱发熔化激活法(sima)制备az91半固态坯料枝晶演变规律。
Thixotropic microstructure formation of AZ91 by Strain Induced Melt Activation Process (SIMA) was investigated in this study.
使用有限元软件ANSYS，把熔体流动计算结果作为参数，计算了枝晶的受力状态。
Based on FEM software ANSYS, the dendrites stress states are computed using the results of the melt flow as computing parameters.
铝合金锻件中有时有未锻合的疏松和残留的枝晶自由表面，并保留有原始的结晶台阶。
Unhealed porosities and free surface of dendrites with crystalline steps were occasionally observed in aluminium alloy forgings.
研究了凝固潜热对过冷合金熔液中的等轴枝晶生长以及溶质场和温度场的分布的影响。
The effects of solidification latent heat on the growth of equiaxed dendrite, distribution of solute field and temperature field in undercooled liquid alloy were analyzed.
研究了凝固潜热对过冷合金熔液中的等轴枝晶生长以及溶质场和温度场的分布的影响。
The effects of solidification latent heat on the growth of equiaxed dendrite, distribution of solute field and temperature field in undercooled liquid alloy were analyzed.
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