变晶

A phase-field model was built by optimizing characteristic parameters in the convectional phase-field model for peritectic transition, which is suitable to simulate microstructure evolution for peritectic transition of specific alloys.

李新中，苏彦庆，郭景杰，吴士平，傅恒志摘要：通过对当前包晶相变相场模型特征参数的优化，建立了适合对具体合金包晶相变微观组织演化进行模拟的相场模型。

The results showed that SiO2 induces the abnormal grain growth and increases the eddy current loss,also increases power loss.

结果显示晶粒随SiO2含量增加而变大，而且有局部的晶粒成长，晶粒变大进一步会影响晶界电阻，使的涡流损失增加，导致功率损失也跟著变大。

The change of speed of autoconversion of snow to graupel, different collection efficiency of ice phase particles, the quality content or number content averaged falling speed, various parameters of quality and falling speed of snow, will influence the quality and number content of water substances.

雪晶自动转化成霰、不同的冰相粒子间的碰并效率、不同的雪晶质量系数和落速系数和采用不同的平均落速，将影响粒子的比质量和比数浓度；模拟大陆性云和海洋性云应采用不同的云参数；冰晶核化应考虑温度变率和水汽冰面过饱和度。

Molecular dynamics simulation was carried out to study transformation pseudoelasticity in NiAl alloy with a initial B2 structure, using EAM type interatomic potential for NiAl.

利用NiAl合金的嵌入原子势，进行了B2结构NiAl单晶中相变伪弹性的分子动力学模拟模拟过程中系统的径向分布函数和键连线原子分布图的变化表明，在外加拉应力的作用下，B2结构的奥氏体向L10结构的马氏体转变，马氏体在长大过程中发生了变体间的转化与合并，不同取向的变体之间由于自协调效应形成共格的孪晶界面。

Lattice constants a stays constant and c is inclined to decreasing.

晶格常数a基本不变，而晶格常数c有减小的趋势。

Shape memory alloy with thermoelastic martensite metallography transform represents absolute shape memory effect, for matrix metallography lattice orientation selectivity in reverse metallography transform.

具有热弹性马氏体相变的形状记忆合金，在逆相变中必定会选择相变前母相的晶格位向，表现出完全的形状记忆效应。

The formation of martensite is accomplished by the immigration of well-defined glissile interface (121)fcc type and its misfit dislocations can produce the lattice invariant deformation on the basis of phenomenal theory of martensitic crystallography, however, LID is retarded slightly after the migration of interphase (121)fcc, i.e.a thin plate-like zone exists without LID in martensite near the well-defined interface. When the temperature reduces to the Ms point, the lattice parameter of austenite matrix is √3/2 times that of the martensite without LID. This critical condition for spontaneous transformation agrees with that the stack fault energy in matrix is less than zero according to Olson and Cohen's nucleation model.

通过模型分析表明：fcc/bcc马氏体形核与长大过程是通过(121)fcc型择优界面推移进行的，界面上的错配位错可以完成马氏体晶体学唯象理论要求的点阵不变变形，但LID要稍滞后于界面迁移，即在马氏体形核与长大过程中推移界面新相一侧存在一未发生LID的新相薄区；当相变温度达到马氏体相变点Ms时，母相奥氏体与这一薄区的晶格常数比为√3/2，这一几何条件和Olson-Cohen形核模型中要求扩展位错层错区界面能γ≤0是等价的。

At this moment,that the change of neutral plane position plays a main role in the course of interface bonding,the grain refinement degree heightens whenεincreases. When e is higher than 4.8,the copper with big grains is made up of two kinds of structure regions in the course of deforming,namely fine sub-grains region and high density dislocation region.

此时，异步叠轧中性面位置的改变对界面的复合起到主要作用，变形等效应变的增大使晶粒细化程度变大；变形等效应变ε≥4.8时，粗晶铜在变形过程中有两种组织区域组成，分别为细小亚晶区和高密度位错区。

In the second formation of the Langshan group in the Dongshengmiao polymetallic pyrite deposit, metamorphic basic volcanic rock s have been discovered,except quartz keratophyre, with a blastoporphyritic texture containing albite and oligoclase and minor, pyroxen and hornblende.

东升庙硫－多金属矿床狼山群二组含矿地层中，除已发现的变质石英角斑岩之外，又找到具有变余斑状结构（斑晶主要为钠质斜长石，另有少量辉石和角闪石）的变质基性火山岩和变质凝灰岩夹层以及火山岩屑与晶屑。

Structure: The structure of Jade variable phenocryst interwoven structure, refers to its metamorphism, the transparent and granular around the porphyroblast small fibrous mineral crystals formed interwoven structure.

结构：翡翠的结构为变斑晶交织结构，系指其在变质作用下，透明粒状斑晶的周围的细小纤维状的矿物晶体交织在一起而形成的结构。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。