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   pure materials 在 金属学及金属工艺 分类中 的翻译结果: 查询用时:0.011秒
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pure materials
相关语句
  纯物质
    Magneto-thermodynamic effects on solidification of pure materials
    纯物质凝固的磁场热力学分析
短句来源
    Based on the principles of thermodynamics, the changes of Gibbs free energy and melting equilibrium temperature of pure materials caused by magnetization in a high magnetic field were analyzed.
    从热力学基本原理出发初步分析了强磁场磁化对纯物质吉布斯自由能和平衡凝固温度的影响。
短句来源
    The existing phase-field models for simulation of solidification microstructures of metal melt are described comprehensively including the phase-field of pure materials,binary alloy with ideal solution model or regular solution model and dilute model. The necessity of establishing the phase-field model for simulation of solidification microstructures of the alloy with complex solution patterns is pointed out.
    全面阐述了现有的金属熔体凝固微观组织模拟的相场模型:纯物质、二元合金理想溶液或正规溶液和稀溶液相场模型,指出构造适合于具有复杂溶液模型的金属熔体凝固微观组织模拟相场模型的必要性。
短句来源
  “pure materials”译为未确定词的双语例句
    By means of VIM+VAR double vacuum melting technology secured super pure materials and by the super homogenization hotwork and controlling martensitic transformation heat treatment techniques, the new types of low carbon ultra-high strength steel in combination with high toughness were obtained. The tensile strengths reach 1 915 MPa and 1 862 MPa and the fracture toughnesses reach 119 MPa and 120 MPa·m~(1/2) respectively.
    用VIM+VAR双真空超纯洁熔炼、超均匀加工及控制相变热处理等技术,获得2种低碳超高强度高韧性不锈钢,其力学性能分别达到抗拉强度1915MPa和1862MPa,断裂韧度119MPa·m1/2和120MPa·m1/2。
短句来源
    Take advantages of the sharp-interface model and the diffusive interface model, the simulation work of this paper is focused on pure materials.
    以纯物质的凝固过程为研究对象,利用明锐界面模型和扩散界面模型进行数值模拟工作。
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  pure materials
Dendritic growth with fluid flow in pure materials
      
Quantitative deficiencies of the model for pure materials are discussed; most of them are related to neglection of subgrain formation.
      
Alloys of Al-CuAl2 eutectic composition were prepared from 99.999 pct pure materials and directionally solidified in a temperature gradient of about 45 °C/cm at different growth ratesR.
      
The deformation of pure materials of stoichiometric composition is determined by the processes of formation and motion of intrinsic thermal defects.
      
This is of great importance in the milling of pure materials, where no contamination can be tolerated.
      
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In the present paper, it is pointed out that the development of iron and steels is striding forward a new stage, and the discussion to this has been made It is shown that in the 20th century, about 30 years had been spent in studying the problem of the low tensile strengths σ s (σ b) of the practical materials of engineerings, and having recogniged and basically solved it; after that,the great efforts had been made to increasing the fracture strength σ f The roles played by the rare earth in steels...

In the present paper, it is pointed out that the development of iron and steels is striding forward a new stage, and the discussion to this has been made It is shown that in the 20th century, about 30 years had been spent in studying the problem of the low tensile strengths σ s (σ b) of the practical materials of engineerings, and having recogniged and basically solved it; after that,the great efforts had been made to increasing the fracture strength σ f The roles played by the rare earth in steels are discussed, in combination with explaining the methods of increasing σ f In addition , the particularities of the rare earth in steels are also expounded, and it is pointed out that precisely these particularities determine the developing progress of the rare earth steels It is indicated that the demands for steels, in the 21st century, will change from unitary to synthatic; the problem of σ f,localized weakness and so on will be more pronounced due to the high strength and high-energy state of the steels The problems concerning "the super steels", the effects of enviroment and pollution on the ultra-pure material and the large size inclusios in the steels with ultra-fine grains and ultra-low concentration of impurities are also discussed The notable anisotropy of mechamical properties and the presence of a significant population of the inclusions with large size in the steels containing an ultra-low content of sulphur are described, and it is clearly shown tnat these have an universality and the roles of the modification properties of the rare earth are more remarkable in such steels than in the general"steels treated with rare earth" The localized weakness in steels is discussed in detail And it is considered that controlling the weakness sources and decreasing the energy in the localized regions are as important as cleaning of steels, for reducing the localized weakening in steels; and the strong role suppressing the localized weakness of strength in steels played by the rare earth is presented It is indicated that all the processes occuring in the engineering materials are essentially associated with decreasing of the system energy, thus the microstructures in steels would play a prominent role in the processes due to the high-energy state of them It is considered that clarifying steels, modifying the inclusions in the clean steels, controlling microstructures and lowing the energy states of them, and so on would constitute a basic way to solve the problems of the steels in the 21st century; and the rare earth just play key roles in these respects It concludes that the addition of the rare earth to steels will be an important approach to develaping the steels in the 21st century; as a example,the fact that the "king of steels" in the 20th century, namely the 350 grade (245kg/mm 2) of maraging steel has been produced only by the adition of La, is given

文章指出并讨论了钢铁正进入新发展阶段。指出 2 0世纪大约用了 30年时间认清和基本解决了实际结构材料 σs(σb)低的问题 ,而后 5 0多年的主要努力是提高 σf;并结合阐明提高 σf的途径 ,介绍和讨论了钢中稀土的作用。还阐述了钢中稀土的特殊性 ,并指出正是它决定了稀土钢的发展历程。文章指出 ,2 1世纪对钢的要求已由以往的单一性发展到综合性 ,2 1世纪钢 σf 问题更突出 ,以及由于强度增加和能态高 ,局域弱化更明显。还讨论了“超级钢”、超高纯材料的环境效应与污染、超细化与超低杂质浓度钢的大尺寸夹杂等问题。文章介绍并指出 ,超低 S钢存在高比分长条夹杂和性能有明显的各向异性 ,指明它的普遍性及稀土在超低硫钢里有更显著的变性作用。详细讨论了钢的局域弱化 ,指出控制弱化源和降低局域区能态对它像洁净化一样重要 ;并介绍了稀土的强抑制钢局域弱化作用。还指明了结构材料里发生的种种过程 ,都具有体系能量降低的实质 ;因而高能态的微结构在其中起突出作用等等。文章提出 ,洁净化、变性洁净钢夹杂及控制与降低微结构的能态等 ,是解决 2 1世纪钢问题的基本途径 ;而稀土元素则恰恰具有这些方面的突出作用。文章从 2 1世...

文章指出并讨论了钢铁正进入新发展阶段。指出 2 0世纪大约用了 30年时间认清和基本解决了实际结构材料 σs(σb)低的问题 ,而后 5 0多年的主要努力是提高 σf;并结合阐明提高 σf的途径 ,介绍和讨论了钢中稀土的作用。还阐述了钢中稀土的特殊性 ,并指出正是它决定了稀土钢的发展历程。文章指出 ,2 1世纪对钢的要求已由以往的单一性发展到综合性 ,2 1世纪钢 σf 问题更突出 ,以及由于强度增加和能态高 ,局域弱化更明显。还讨论了“超级钢”、超高纯材料的环境效应与污染、超细化与超低杂质浓度钢的大尺寸夹杂等问题。文章介绍并指出 ,超低 S钢存在高比分长条夹杂和性能有明显的各向异性 ,指明它的普遍性及稀土在超低硫钢里有更显著的变性作用。详细讨论了钢的局域弱化 ,指出控制弱化源和降低局域区能态对它像洁净化一样重要 ;并介绍了稀土的强抑制钢局域弱化作用。还指明了结构材料里发生的种种过程 ,都具有体系能量降低的实质 ;因而高能态的微结构在其中起突出作用等等。文章提出 ,洁净化、变性洁净钢夹杂及控制与降低微结构的能态等 ,是解决 2 1世纪钢问题的基本途径 ;而稀土元素则恰恰具有这些方面的突出作用。文章从 2 1世纪对钢的要求和它具备的条件 ,从 2 1世纪钢的自身需要和稀土作用得出 :用稀?

Phase field method offers the prospect of being able to perform realistic numerical experiments on dendrite growth in a metallic system. In this paper, the equiaxed dendrite evolution during the solidification of a pure material was numerically simulated using the phase field model. The equiaxed dendrite growth in a two-dimensional square domain of undercooled melt (nickel) with four-fold anisotropy was simulated. The phase field model equations was solved using the explicit finite difference method on...

Phase field method offers the prospect of being able to perform realistic numerical experiments on dendrite growth in a metallic system. In this paper, the equiaxed dendrite evolution during the solidification of a pure material was numerically simulated using the phase field model. The equiaxed dendrite growth in a two-dimensional square domain of undercooled melt (nickel) with four-fold anisotropy was simulated. The phase field model equations was solved using the explicit finite difference method on a uniform mesh. The formation of various equiaxed dendrite patterns was shown by a series of simulations, and the effect of anisotropy on equiaxed dendrite morphology was investigated.

Phase field method offers the prospect of being able to perform realistic numerical experiments on dendrite growth in a metallic system. In this paper, the equiaxed dendrite evolution during the solidification of a pure material was numerically simulated using the phase field model. The equiaxed dendrite growth in a two-dimensional square domain of undercooled melt (nickel) with four-fold anisotropy was simulated. The phase field model equations was solved using the explicit finite difference method on a un...

Phase field method offers the prospect of being able to perform realistic numerical experiments on dendrite growth in a metallic system. In this paper, the equiaxed dendrite evolution during the solidification of a pure material was numerically simulated using the phase field model. The equiaxed dendrite growth in a two-dimensional square domain of undercooled melt (nickel) with four-fold anisotropy was simulated. The phase field model equations was solved using the explicit finite difference method on a uniform mesh. The formation of various equiaxed dendrite patterns was shown by a series of simulations, and the effect of anisotropy on equiaxed dendrite morphology was investigated.

The phase field method is based on the general GinzburgLandau theory of phase transitions. It reflects these basic ideas in terms of differential equations, where diffusion, ordering potential and thermodynamic driving force are represented by operations of appropriate symmetry. In this paper, the morphology of dendrite and the equiaxied dendrite evolution during the solidification process of pure material nickel were numerically simulated by using the phase field method. The phase field model equations...

The phase field method is based on the general GinzburgLandau theory of phase transitions. It reflects these basic ideas in terms of differential equations, where diffusion, ordering potential and thermodynamic driving force are represented by operations of appropriate symmetry. In this paper, the morphology of dendrite and the equiaxied dendrite evolution during the solidification process of pure material nickel were numerically simulated by using the phase field method. The phase field model equations were solved by using the explicit finite difference method on an uniform mesh. The simulated results show the dendrite crystal growth process, including primary and secondary arms, the competition between the dendritic arms as well as the "necking" during the dendrite growth process.

相场方法以Ginzburg Landau相变理论为基础,通过微分方程反应扩散、有序化势及热力学驱动力的综合作用。本文采用相场模型模拟了纯物质凝固过程的等轴枝晶的演化和枝晶的形貌,并针对金属镍进行了二维数值模拟,计算了过冷熔液中的枝晶生长。在相场方程中采用均匀网格的显示有限差分方法求解。模拟结果显示了枝晶的形貌和生长过程,包括一次臂和二次臂,以及枝晶生长过程中出现的生长竞争和"缩颈"现象。

 
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