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波动形核
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  fluctuation nucleation
     If the elastic strain and the plastic strain are matched appropriately, the lath of marten- site can be distinctively refined to nanometer scale with an average width of 120 nm. The soft mode fluctuation nucleation mechanism of martensitic transformation can be used to explain the observed results.
     而塑性应变对马氏体的生长有限制作用,可间接影响马氏体的相变形核,两者的恰当配合,可显著细化马氏体,使其板条平均宽度接近纳米量级水平(平均宽度为 120 nm).在此基础上,提出了一种马氏体相变的软模弹性波动形核机制,可解释所获得的实验结果.
短句来源
  相似匹配句对
     WAVE PROPAGATION IN GRQUNDWATER
     地下水的波动
短句来源
     The Application of Fluctuating Pictures
     波动图像的运用
短句来源
     Research of the Diamond Film Nucleation
     金刚石薄膜的形核研究
短句来源
     (2) The phenomena of dislocation nucleation.
     (2)位错形核现象.
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  fluctuation nucleation
An analysis of the distribution of crystals in the gel allows the assumption that the mechanism of their formation is identical to the fluctuation nucleation of the solid phase.
      
Several internal-friction mechanisms in the first-order phase transition temperature region related to the fluctuation nucleation of a new phase and motion of the interphase boundaries affected by the external stresses are reviewed.
      


Using Geeble-1500 thermal analogue test machine, the ultra-strength steel 30CrMn- SiMoV was prestrained in the austensite state at non-dynamic recrystallization temperature (960℃), and then quenched by three processes: the first, the sample was spray quenched immediately un- der loaded condition; the second, the unloaded sample kept at 960 ℃ for 5 min and then was spray quenched; the last, the loaded sample was reheated to 1050℃ and kept for 5 min to take place re- crystallization, then was spray quenched. The...

Using Geeble-1500 thermal analogue test machine, the ultra-strength steel 30CrMn- SiMoV was prestrained in the austensite state at non-dynamic recrystallization temperature (960℃), and then quenched by three processes: the first, the sample was spray quenched immediately un- der loaded condition; the second, the unloaded sample kept at 960 ℃ for 5 min and then was spray quenched; the last, the loaded sample was reheated to 1050℃ and kept for 5 min to take place re- crystallization, then was spray quenched. The results show that the elastic strain energy kept in the sample stimulates homogeneous nucleation of martensite while the plastic strain restricts the growth of martensite. If the elastic strain and the plastic strain are matched appropriately, the lath of marten- site can be distinctively refined to nanometer scale with an average width of 120 nm. The soft mode fluctuation nucleation mechanism of martensitic transformation can be used to explain the observed results.

使用 Gleeble—1500型热模拟机,对 30CrMnSiMoV超高强度钢在奥氏体状态下预应变,而后分三种工艺淬火:预应变结束后不卸载立即喷雾冷却;预应变结束后卸载,并于960℃保温5 min后再喷雾冷却;预应变后不卸载,重新加热至1050℃,并保温5 min;发生再结晶后再喷雾冷却.经对其马氏体组织进行分析发现:处于释放状态的弹性应变能会促发马氏体相变均匀形核;而塑性应变对马氏体的生长有限制作用,可间接影响马氏体的相变形核,两者的恰当配合,可显著细化马氏体,使其板条平均宽度接近纳米量级水平(平均宽度为 120 nm).在此基础上,提出了一种马氏体相变的软模弹性波动形核机制,可解释所获得的实验结果.

 
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