Effect of wide change of cooling rate on dendritic segregation of a directionally solidified cobalt-base superalloy

1、

Results show that the increase of cooling rate can restrain dendritic segregation effectively, especially for easily segregated alloy elements.

结果表明：增大冷却速率可有效抑制枝晶偏析，对易偏析元素其效果更明显；

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2、

After homogenizing treatment, the dendritic segregation dissolves into the matrix again.

此外，通过均匀化退火可以有效的消除枝晶偏析。

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3、

The results show that the dendritic segregation is fully broken in the forging near inner and outer wall.

结果表明，在靠近内、外壁区域，树枝状偏析结构被充分锻碎；

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4、

The high pressure improves solid solubility of solute into solid solution and reduces the dendritic segregation.

高压增加了溶质原子在固溶体中的固溶度，减少了枝晶偏析。

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5、

The dendritic segregation of elements decreased.

元素的枝晶偏析减小，中、高温的纵向持久寿命增加。

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6、

The final products are badly influenced by dendritic segregation of ingot without homogenization treatment.

铸锭若未经均匀化退火，最终制品的性能会受到枝晶偏析和第二相的严重影响。

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7、

Methods: 101 cases ( 126 eyes) of dendritic keratitis were painted with carbolic acid or trichloroacetic acid following topical anesthesia with 1% Dicaine and then dressed. Results: The condition of the patients was satisfactory 7~ 10 days after operation.

方法：101例126眼树枝状角膜炎患者均在1%地卡因表面麻醉后应用石炭酸或三氯醋酸搽于病变角膜上皮然后包扎。

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8、

The adverse reaction of the worsening of dendritic keratitis was not observed when trace dexamethasone [ 0.001%, one percent of usual concentration ( 0.1%)] was used to treat the experimental HSV keratitis.

在动物实验中，微量地塞米松[0.001%，常用浓度（0.1%）的百分之一]并不恶化上皮型HSV角膜炎。

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9、

Treatment of dendritic keratitis with eroding and stripping the corneal epithelium ( report of 52 cases)

角膜上皮腐蚀剥脱术治疗树枝状角膜炎（附52例报告）

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10、

Result: The effective rate of dendritic keratitis in treatment group and control group was 100%, 88.24%, respectively.

结果：对于树枝状角膜炎，治疗组和对照组的有效率分别为100%，88.24%；

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11、

Objective: It is to explore the best method and opportunity of treatment for dendritic keratitis.

目的：探讨树枝状角膜炎的最佳治疗措施。

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12、

The improved model was applied to simulate the dendritic features, in the cases of the free dendritic growth from an undercooled melt, competitive columnar growth in the directional solidification and equiaxed dendritic evolution.

应用改进的模型模拟了不同择优取向的单枝晶在过冷熔体中的自由生长、定向凝固过程中柱状晶的竞争生长以及等轴晶的演变过程。

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13、

Progress of Dendritic Morphology Evolution during Solidification Process

凝固过程中枝晶组织形貌演变模拟进展

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14、

Phase-field modeling of free dendritic growth with adaptive finite element method

自由枝晶生长相场模型的自适应有限元法模拟

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15、

Recent Progress of Steady State Theory of Dendritic Growth

枝晶生长的稳态理论新进展

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16、

Dendritic Growth Simulation of Polycrystalline for Pure Material by Phase Field Method

相场法模拟流动下纯物质多晶粒枝晶形貌研究

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17、

Research of simulation dendritic growth of xenon by phase field method;

研究了相场方法在纯物质凝固生长过程中计算模拟的应用。

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18、

Results: In 204 cases of all types of HSV keratitis, 86 cases were infectious epithelial keratitis that was cured completely, including 13 cases of cornea vesicle, 33 cases of dendritic ulcer, 38 cases of geographic ulcer and 2 cases of marginal ulcer.

结果：本组204例HSK中，属于感染性上皮角膜炎86例，其中角膜小泡13例，树枝状溃疡33例，地图状溃疡38例，缘部溃疡2例，全部治愈。

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19、

The experimental results showed that the microstructure of Cu 26.6wt% Mn alloy changed from cellular to dendrite, super fine cellular and segregation free solid with the increase of growth rate;

实验结果表明，重熔区组织较基体组织大大细化；随着生长速度的增大，Cu26.6wt%Mn合金的组织由低速胞晶向枝晶、高速胞晶及完全无偏析固溶体转变。

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20、

Solute diffusion controlled solidification model was applied to simulate the initial stage cellular to dendrite transition of TiAl alloys during directional solidification at different velocities.

利用溶质扩散控制模型对TiAl合金定向凝固初始阶段变速过程中胞晶／枝晶转变进行了数值模拟。

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