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peritectic transition
相关语句
  包晶相变
     PHASE-FIELD RESEARCH OF MICROSTRUCTURE EVOLUTION FOR DIRECTIONALLY SOLIDIFIED PERITECTIC TRANSITION Ⅱ. Simulation of Nucleation-Controlled Microstructure
     定向凝固包晶相变微观组织演化的相场方法研究 Ⅱ.形核控制的微观组织模拟
短句来源
     PHASE-FIELD RESEARCH OF MICRO STRUCTURE EVOLUTION FOR DIRECTIONALLY SOLIDIFIED PERITECTIC TRANSITION Ⅰ. Extension of Trijunction
     定向凝固包晶相变微观组织演化的相场方法研究 Ⅰ.三相交节点的延伸
短句来源
     The microstructure evolution of both phases is simulated by the phase-field model of peritectic transition for directionally solidified Ti-A1 alloy at a high value of G/vp when the continuous nucleation occured to a sample with a small diameter and the multiple nucleation occured to a sample with a big diameter. The simulated results show that for the small sample decreasing sample size or nucleation undercooling of peritectic phase tended to form island band structure.
     采用包晶相变相场模型分别模拟了高G/vP定向凝固Ti-Al合金在小直径试样的连续形核和大直径试样的多重形核情况下,包晶两相微观组织演化.模拟结果表明,对于小直径试样,减小试样尺寸或减小包晶相形核过冷度倾向于形成岛屿带状组织;
短句来源
  “peritectic transition”译为未确定词的双语例句
     The results show that under rapid solidification condition,the peritectic transition and eutec-toid transitions of the alloy are all suppressed,which results in the formation of microstructures characterized mainly by metastable Cu5.6Sn metallic compound.
     结果表明:在急冷快速凝固条件下,合金的包晶转变和共析转变均受到抑制,形成了以亚稳的Cu5.6Sn金属间化合物为主相的快速凝固组织;
短句来源
  相似匹配句对
     Connection and Transition
     联系与过渡
短句来源
     Employment in Transition
     变革中的劳动就业
短句来源
     Supercooling of Peritectic Alloys
     包晶合金的成分过冷
短句来源
     PHASE-FIELD RESEARCH OF MICRO STRUCTURE EVOLUTION FOR DIRECTIONALLY SOLIDIFIED PERITECTIC TRANSITION Ⅰ. Extension of Trijunction
     定向凝固包晶相变微观组织演化的相场方法研究 Ⅰ.三相交节点的延伸
短句来源
     PHASE-FIELD RESEARCH OF MICROSTRUCTURE EVOLUTION FOR DIRECTIONALLY SOLIDIFIED PERITECTIC TRANSITION Ⅱ. Simulation of Nucleation-Controlled Microstructure
     定向凝固包晶相变微观组织演化的相场方法研究 Ⅱ.形核控制的微观组织模拟
短句来源
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  peritectic transition
The two stages of the peritectic transition involving the liquid phase-the reaction, which sees austenite grow along the ferrite/liquid boundary, and the direct solidification of austenite-were observed.
      
The peritectic transition, where δ -ferrite and liquid transform into γ -austenite, is an important aspect of product quality and process control in many ferrous and non-ferrous alloys.
      
It was found that both peritectic transition and reaction rate were dependent on the ambient atmosphere.
      
It was found that both the peritectic transition and the reaction rate were dependent on the ambient atmosphere.
      
The peritectic transition temperatures are close to the transition temperatures of some of the metal (carbide)-carbon eutectics.
      


A phase-field model was built by optimizing characteristic parameters in the convec-tional phase-field model for peritectic transition, which is suitable to simulate microstructure evolution for peritectic transition of specific alloys. The growth of peritectic phase along the primary phase surface was simulated using this model for directionally solidified Ti-A1 alloy at a high value of G/vp. The simulating results show that the difference of extending character of trijunction will cause two...

A phase-field model was built by optimizing characteristic parameters in the convec-tional phase-field model for peritectic transition, which is suitable to simulate microstructure evolution for peritectic transition of specific alloys. The growth of peritectic phase along the primary phase surface was simulated using this model for directionally solidified Ti-A1 alloy at a high value of G/vp. The simulating results show that the difference of extending character of trijunction will cause two typical microstructures of discrete band and island band. Furthermore, the width of computational domain, the nucleation undercooling of peritectic phase and initial composition affect the extension of trijunction of directionally solidified peritectic alloy directly, and also the final microstructure.

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.利用该模型对高G/vp定向凝固Ti-Al合金的单个包晶相核心依附初生相表面的生长行为进行了模拟.结果表明,三相交节点延伸特性的差异将导致形成离散带状和岛屿带状两种典型组织.并且,计算域宽度、包晶相形核过冷度和初始成分直接影响到定向凝固包晶合金三相交节点的延伸,也就影响到其最终的微观组织.

The microstructure evolution of both phases is simulated by the phase-field model of peritectic transition for directionally solidified Ti-A1 alloy at a high value of G/vp when the continuous nucleation occured to a sample with a small diameter and the multiple nucleation occured to a sample with a big diameter. The simulated results show that for the small sample decreasing sample size or nucleation undercooling of peritectic phase tended to form island band structure. But to the big sample, the...

The microstructure evolution of both phases is simulated by the phase-field model of peritectic transition for directionally solidified Ti-A1 alloy at a high value of G/vp when the continuous nucleation occured to a sample with a small diameter and the multiple nucleation occured to a sample with a big diameter. The simulated results show that for the small sample decreasing sample size or nucleation undercooling of peritectic phase tended to form island band structure. But to the big sample, the differences of the volume fraction of peritectic phase and the nucleation rate cause to form the discrete band, island band and coupled-growth structures.

采用包晶相变相场模型分别模拟了高G/vP定向凝固Ti-Al合金在小直径试样的连续形核和大直径试样的多重形核情况下,包晶两相微观组织演化.模拟结果表明,对于小直径试样,减小试样尺寸或减小包晶相形核过冷度倾向于形成岛屿带状组织;而对于大直径试样,包晶相所占体积分数以及形核率的不同将导致形成离散带状、岛屿带状和耦合生长组织.

The phase structure,crystal growth behavior and microstructural characteristics of rapidly solidified Cu-20%Sn alloy were investigated and the relationships between the microstructure formation and the cooling rate were analyzed theoretically.The results show that under rapid solidification condition,the peritectic transition and eutec-toid transitions of the alloy are all suppressed,which results in the formation of microstructures characterized mainly by metastable Cu5.6Sn metallic compound.With...

The phase structure,crystal growth behavior and microstructural characteristics of rapidly solidified Cu-20%Sn alloy were investigated and the relationships between the microstructure formation and the cooling rate were analyzed theoretically.The results show that under rapid solidification condition,the peritectic transition and eutec-toid transitions of the alloy are all suppressed,which results in the formation of microstructures characterized mainly by metastable Cu5.6Sn metallic compound.With increasing cooling rate,the amount of-αCu phase decreases,while that of Cu5.6Sn phase increases.Meanwhile,the growth form transforms from faced to non-faced growth and the micro-structure exhibits apparent growth orientation.TEM reveals that there exists large quantity of dislocation pile-up and twins in Cu5.6Sn grains.Those twins are parallel to each other with the interspacing about 25~80 nm,and extend to the bounda-ry of Cu5.6Sn branches.The increase of cooling rate results in the increase of dislocation density and twin quantity.

研究快速凝固Cu-20%Sn亚包晶合金的相结构、晶体生长行为和组织特征,分析冷却速率与组织形成之间的相关规律。结果表明:在急冷快速凝固条件下,合金的包晶转变和共析转变均受到抑制,形成了以亚稳的Cu5.6Sn金属间化合物为主相的快速凝固组织;随着冷却速率的增大,-αCu相含量减少,Cu5.6Sn相数量显著增多;晶体生长的方向性增强;Cu5.6Sn生长方式由小平面向非小平面生长转变,组织形态由粗大板条状向细密柱状转变。TEM分析表明:在Cu5.6Sn晶内存在大量的位错塞积及孪晶;孪晶之间相互平行,间距约25~80 nm;随冷却速率的增大,位错密度增大,孪晶数量增多。

 
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