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   晶粒运动 的翻译结果: 查询用时:0.461秒
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晶粒运动
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  grain movement
     MODELLING OF THE THERMO-SOLUTAL CONVECTION, SHRINKAGE FLOW AND GRAIN MOVEMENT DURING GLOBULAR EQUIAXED SOLIDIFICATION IN A MULTI-PHASE SYSTEM Ⅰ. Three-Phase Flow Model
     等轴球晶凝固多相体系内热溶质对流、补缩流及晶粒运动的数值模拟 Ⅰ.三相流模型
短句来源
     MODELLING OF THE THERMO-SOLUTAL CONVECTION, SHRINKAGE FLOW AND GRAIN MOVEMENT DURING GLOBULAR EQUIAXED SOLIDIFICATION IN A MULTI-PHASE SYSTEM Ⅱ. Application of Model
     等轴球晶凝固多相体系内热溶质对流、补缩流及晶粒运动的数值模拟 Ⅱ.模型的应用
短句来源
  “晶粒运动”译为未确定词的双语例句
     Based on the crystal microstructure of the Mn-Cu alloy, the test results are analyzed theoretically in correspondence with the stress, strain and energy change.
     从微观晶粒运动角度,结合应力、应变以及振动能量等特征值变化,对获得的新型锰铜合金环类部件的测试结论进行理论分析。
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  相似匹配句对
     Exercise.
     运动
短句来源
     Logic and Movement
     逻辑和运动
短句来源
     PRELIMINARY STUDY ON GRAIN GROUP MOVEMENT IN SUPERPLASTIC DEFORMATION
     超塑变形中“晶粒群”运动初探
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  grain movement
Flume experiments have been carried out to determine the threshold of grain movement on a rippled bed.
      
The model also illustrates the importance of simulating equiaxed grain movement in the bulk liquid in order to obtain realistic predictions of grain structures.
      
Modeling of microstructural evolution with tracking of equiaxed grain movement for multicomponent Al-Si alloy
      
The model can account for the effects of natural convection, solidification contraction, solidification kinetics, and grain movement on the solidification microstructure evolution.
      
To track grain movement, rules of tracking grain movement are proposed.
      
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n the basis of summarizing the modles of 2D grain rearrangement in superplastic deformation, 3D grain rearrangement in superplastic deformation has been investigated.Metallographic observations show that fine marginal lay'Cr grains at latitudinal direction ofplate specimens of 1#(8090)Al-Li alloy filled in the cavities created at tension direction oflarge central layer grains, and completed grain rearrangement. Grain emergence and rotation of large Al,Zr phase in Al-Li-Zr alloy deformed were observed With SEM.The...

n the basis of summarizing the modles of 2D grain rearrangement in superplastic deformation, 3D grain rearrangement in superplastic deformation has been investigated.Metallographic observations show that fine marginal lay'Cr grains at latitudinal direction ofplate specimens of 1#(8090)Al-Li alloy filled in the cavities created at tension direction oflarge central layer grains, and completed grain rearrangement. Grain emergence and rotation of large Al,Zr phase in Al-Li-Zr alloy deformed were observed With SEM.The results show that fine grains fill 'in f cavities by grain rotation, which is a process of energy decrease. Thephenomena of decrease in the latitudinal size of specimen and migration of local necking atthe specimen margin in the superplastic deformation ean be explained by the motion of finegrains at latitudinal direction.

在总结超塑变形二维晶粒重排模型基础上,研究了超塑变形三维晶粒重排。金相观察表明:1号铝锂合金板状试样宽度方向边层微细晶粒填入中心层大晶粒在拉伸方向产生的空洞而实现晶粒重排。通过扫描电镜观察了晶粒涌出及2号铝锂合金中大Al3Zr相在变形时的转动情况。研究表明,微细晶粒是通过晶粒转动填入空洞的,该过程是一个能量降低的过程。宽度方向微细晶粒的运动解释了超塑变形的试样宽度尺寸的减小及试样板边缘局部颈缩迁移的现象。

Ti is added to Cu-Al-Ni alloys cast by heated mold continuous casting process in order to prohibit grain growth during heating,which would cause performance degradation.Tiny χ-phase forms in w(Ti)=0.2%-0.4% addition.The χ-phase particles disperse in grain boundary and inside the grains,thus stop the grain boundary movement.The χ-phase aggregate in the grain boundaries easily after heating at 900℃ holding 5-20 min,resulting in alloy brittle.Tensile tests show that with Ti addition,yield stress increases while...

Ti is added to Cu-Al-Ni alloys cast by heated mold continuous casting process in order to prohibit grain growth during heating,which would cause performance degradation.Tiny χ-phase forms in w(Ti)=0.2%-0.4% addition.The χ-phase particles disperse in grain boundary and inside the grains,thus stop the grain boundary movement.The χ-phase aggregate in the grain boundaries easily after heating at 900℃ holding 5-20 min,resulting in alloy brittle.Tensile tests show that with Ti addition,yield stress increases while plastic strain remains no change.

为阻止热型连铸Cu-Al-Ni合金在热加工过程中晶粒长大,导致性能恶化,可在合金中加入Ti细化晶粒.当含Ti质量分数为0.2%~0.4%时可形成细小的χ相,能够有效细化晶粒.在900℃加热保温10 min,χ相很容易在晶界处聚集,阻止晶粒的运动,从而阻止了晶粒的长大,但同时使合金变得很脆.试样的拉伸试验表明,对加Ti的合金,其屈服应力升高,对塑性变形的应变量没有影响.

A three-phase flow model has been developed to simulate the solidification process of globular equiaxed grains based on the volume averaging and Eulerian-Eulerian methods. The three phases, liquid, solid and air, share a single pressure field. The basic conservation equations of mass, momentum and enthalpy, and a user defined conservation equation of grain density have been solved for each phase. The thermal and mechanical (drag force) interactions among the phases have been considered. Grain nucleation, growth...

A three-phase flow model has been developed to simulate the solidification process of globular equiaxed grains based on the volume averaging and Eulerian-Eulerian methods. The three phases, liquid, solid and air, share a single pressure field. The basic conservation equations of mass, momentum and enthalpy, and a user defined conservation equation of grain density have been solved for each phase. The thermal and mechanical (drag force) interactions among the phases have been considered. Grain nucleation, growth rate (mass exchange), solute partitioning at the liquid/solid interface and solute transport have also been accounted for. Due to the low density, the air phase floats always at the top region, forming a definable air/liquid melt interface, i.e. free surface. By tracking this free surface, the shrinkage cavity in an open casting system can be modeled. As the temperature and concentration dependent density and solidification shrinkage are explicitly included, the thermo-solutal convection, together with feeding flow and grain movement can be taken into account.

基于Eulerian-Eulerian方法和体积元平均技术,建立了模拟等轴球晶凝固过程的液、固、气三相流模型.液、固两相处理成相互分离、相互扩散的介质,气相与液、固两相只存在热量及动量的相互作用,三相(凝固前)作为自由流体共享一个统一的压力场.分别求解三相的质量、动量、溶质、热焓守恒方程;相间的热量交换和摩擦拖拽以及液/固界面上的溶质再分配和凝固潜热释放,通过定义对应守恒方程的源项和交换项而加以考虑;另外,单独求解一个晶粒密度守恒方程.晶粒的形核生长(相变) 也加以模型化并体现在对应的源项中,模型中所用的密度定义为溶质与温度的函数,因此可综合考虑热溶质对流、晶粒运动及凝固收缩所引起的补缩流动.凝固过程的体积收缩及补缩流动将体现在气/液自由表面的波动上.

 
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