grain refinement

Simulation and Analysis of ECAP Method for Grain Refinement

ECAP细化晶粒法的仿真与分析

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The present work has studied the recently developed Al Ti C B master alloy. Its microstructure and ability to grain refinement of commercial pure Al and Zr containing Al alloy were examined and compared with those of Al Ti B master alloy.

研究了新近开发的Al－Ti－C－B中间合金细化剂，检查了其显微组织及细化工业纯铝及含Zr铝合金的性能，并与Al－Ti－B中间合金细化剂进行了对比。

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Effect of quenching temperature and tempering time on grain refinement in TiAl base alloy

淬火/回火热处理对TiAl基合金晶粒细化的影响

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When the titanium content is lower, the grain refinement effect of Al-Ti-B master alloy is slightly superior to that of electrolytic low-titanium aluminum alloys. But when the titanium content is higher, they have almost same grain-refining ability.

钛含量较低时，熔配加Al-Ti-B中间合金的细化效果略好于电解加钛，当钛含量较高时，二者的细化能力基本相当。

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The results show that the volume and size of the second phases decrease obviously and distribute well after proper solution ( 466 ℃× 2h+ 14 ℃/ h → 480 ℃), these are beneficial to the grain refinement during the succeeding processes.

结果表明在466℃×2h+14℃/h→480℃的固溶处理制度下，第二相的尺寸和数量均明显减少，分布均匀，为后续组织细化处理准备了有利条件。

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The grain refinement strengthening not only enhances strengthening of steel, but improves toughness and plastic.

而其中的细晶强化不但可以提高钢的强度, 而且还可以提高其塑性和韧性.

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Research Status of Grain Refinement Strengthening and Compound Strengthening in Superlight Mg-Li Alloy

超轻Mg-Li合金细晶强化与复合强化的研究现状

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The improvement of YTS is attributed to the grain refinement strengthening of Y and Zn, and to the solid solution strengthening of Zn. The reduction of UTS and elongation are caused by the precipitation of a compound phase along the grain boundary.

Y、Zn元素的细晶强化及Zn元素的固溶强化是屈服强度提高的主要原因；抗拉强度和延伸率的降低是由于化合物相沿晶界析出。

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Effects of high Temperature Deformation Quenching on Grain Refinement of 20 Dual-phase Steel

高温形变热处理对20双相钢晶粒细化的影响

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The chemical composition, grain refinement methods, application situation and progress in wrought Al-Mn alloy were summarized.

综述了变形铝锰合金的化学成分 、 细化方法 、 应用现状及发展动态.

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The effects of modification, grain refinement, polystyrene pattern, pouring temperature on aluminum alloy porosity in LEC process is studied.

探讨了铝液变质、晶粒细化、浇注温度及聚苯乙烯模样等对消失模铝铸件针孔的影响。

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At certain a magnetic field, the extent of grain refinement increased with the increasement of alternating currents.

同一磁场强度下，随着电流强度的增大，晶粒变细。

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Effect of Grain Refinement on Cu-Base Shape Memory Alloys

晶粒细化在铜基形状记忆合金中的作用

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The technology of composition control, grain refinement and modification of the alloy can heavily influence its character.

合金的成分控制及其晶粒细化、变质处理等工艺对合金性能影响甚大。

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Research on Master Alloys Used in Aluminium Alloys Grain Refinement

用于铝合金晶粒细化的中间合金研究

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Spiral magnetic field, the clusters move from the liquid to the solid phase than that required to overcome the barrier when no magnetic field reduction, help to improve the nucleation rate of primary α dwarf, so the purpose of grain refinement.

螺旋磁场处理后，原子团簇由液相向固相迁移所需克服的势垒比无磁场处理时减少，有助于提高初生α相形核率，从而达到细化晶粒的目的。

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Grain refinement mechanism of a 700 MPa ultralow carbon bainite heavy plate steel

700MPa级超低碳高强度贝氏体厚钢板的晶粒细化机制研究

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The results show that the titanium added by electrolysis has better effect of grain refinement than that of the titanium added by the master alloy.

结果表明，电解掺钛具有更优良的晶粒细化作用。

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Its grain refinement mechanism may dislocation produces on different slip plane and form twin crystal. These twin crystal tangles each other.

其晶粒细化机理为：位错在不同滑移面上排列后，形成挛晶，然后这些孪晶进行交割，最终将晶粒细化而产生纳米晶。

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The results suggest that cross slip of different pass is not a mechanism of grain refinement, cross deformation band on plane R and double slip or many slip is other mechanism of grain refinement.

这说明了多道次之间的交滑移不是晶粒细化的唯一机制，R面交叉变形带的出现和1道次中观察到的双滑移或多滑移，也是造成组织等轴化的另一个重要机制。

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It is shown that the grain refinement could effectively improve the strength and toughness of the angle iron.

通过金相组织与力学实验结果可知，晶粒细化可以有效的提高角钢的强韧性。

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The whole shape of a thermal analysis cooling curve can characterise Al-Si alloy melt, including the grain refinement and modification effects.

冷却曲线的整体形状可以表征包括熔体细化及变质效果在内的Al Si合金熔体状态。

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The constitutive relation can be used for not only general heat working problems but also the deformation process where dynamic recrystallization results grain refinement so that the grain boundary sliding becomes the predominant deformation mechanism.

这一本构关系不仅适用于一般的热加工变形，还适用于动态再结晶引起晶粒细化所造成的变形机理改变的热变形过程。

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Nb ( C, N) and V ( C, N) mainly precipitate on dislocation, grain boundary and sub-boundary, with oval, round or irregular shape, they can effectively pin the movement of dislocation, also have significant grain refinement effect.

Nb（C、N）和V（C、N）主要在位错、晶界和亚晶界等处析出，一般成椭圆形、圆形或不规则形状，可以有效钉扎位错运动，产生显著的晶粒细化效果。

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Dislocation strengthening and grain refinement strengthening makes coil 059 with the higher yield strength.

位错强化与晶粒细化强化是059板卷具有高屈服强度的原因.

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Evaluation Criterions of Grain Refinement for Hypoeutectic Al-Si Alloy by Thermal Analysis

亚共晶铝硅合金晶粒度热分析法评估判据

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Processing route is a very important fact of grain refinement in ECAP besides temperature.

发现除变形温度外，变形方式也是ECAP变形中晶粒细化很重要的一个因素。

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