| 不同制备方法对单晶高温合金取向特征的影响 |
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| 引用本文： | 杨初斌,刘林,罗宁,韩宝军,张小联,张军,傅恒志.不同制备方法对单晶高温合金取向特征的影响[J].稀有金属材料与工程,2017,46(4):912-916. |
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| 作者姓名： | 杨初斌 刘林 罗宁 韩宝军 张小联 张军 傅恒志 |
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| 作者单位： | 西北工业大学凝固技术国家重点实验室,西北工业大学凝固技术国家重点实验室,赣南师范学院,赣南师范学院,赣南师范学院,西北工业大学凝固技术国家重点实验室,西北工业大学凝固技术国家重点实验室 |
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| 摘 要： | 在高温度梯度定向凝固炉中分别采用选晶法和籽晶法制备单晶高温合金,并采用XRD测定单晶的取向特征。结果表明,采用选晶法制备单晶高温合金时,在激冷板上随机形核的晶粒经过起晶段的竞争生长和螺旋段的选晶作用后,最终获得具有择优取向<001>的单晶。采用籽晶法制备单晶高温合金时,通过重熔籽晶的外延生长,所获得的单晶取向与籽晶取向保持一致。
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| 关 键 词： | 定向凝固 晶体取向 单晶高温合金 选晶法 籽晶法 |
| 收稿时间： | 2014/12/30 0:00:00 |
| 修稿时间： | 2015/2/5 0:00:00 |
Orientation characteristics of single crystal superalloys under different preparation methods |
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| Yang Chubin,Liu Lin,Luo Ning,Han Baojun,Zhang Xiaolian,Zhang Jun and Fu Hengzhi.Orientation characteristics of single crystal superalloys under different preparation methods[J].Rare Metal Materials and Engineering,2017,46(4):912-916. |
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| Authors: | Yang Chubin Liu Lin Luo Ning Han Baojun Zhang Xiaolian Zhang Jun and Fu Hengzhi |
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| Abstract: | Single crystal superalloys have been prepared by adopting the grain selector and seeding technique in a high temperature gradient directional solidification furnace. The orientation characteristics were measured by XRD. Results indicated that for the grain selector method, the crystal solidification began at the cooling plate with random nucleation, and through mutual competitive growth at the starter block. The grains entered the spiral selector, and finally the single crystal superalloys which were close to <001> direction were obtained. By using the seeding technique, by epitaxial growth of partially melted seed crystals, single crystal superalloys which have the same orientation as the seed crystal were obtained. |
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| Keywords: | directional solidification crystal orientation single crystal superalloys grain selector seeding technique |
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