分步退火及初始晶粒对Hastelloy C-276合金晶界特征分布影响
TG111.7; 不同初始晶粒尺寸的 Hastelloy C-276合金经冷轧变形后,分别采用一次退火和二次退火方法进行热处理,其晶界特征分布采用电子背散射衍射技术进行表征.结果表明,初始较大晶粒组织有利于晶界特征分布的优化,特殊晶界比例比小尺寸晶粒组织提高了近10%,达到了78.8%,同时形成了平均尺寸为200 μm晶粒团簇组织.在相同晶粒尺寸条件下,采用二次退火工艺可以明显改善合金的晶界特征分布,∑3n晶界比例得到较大幅度的提高,并形成了良好的团簇组织.这是由于较多的非共格∑3晶界,容易产生∑9和∑27晶界,从而形成更多的三叉晶界,阻断了大角度晶界的连通性....
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| Published in | 东北大学学报（自然科学版） Vol. 39; no. 5; pp. 630 - 648 |
|---|---|
| Main Authors | , , , |
| Format | Journal Article |
| Language | Chinese |
| Published |
北京有色金属研究总院 复合材料中心,北京 100088%东北大学 轧制技术及连轧自动化国家重点实验室,辽宁 沈阳,110819%北京有色金属研究总院 复合材料中心,北京,100088
01.05.2018
东北大学 轧制技术及连轧自动化国家重点实验室,辽宁 沈阳 110819 |
| Subjects | |
| Online Access | Get full text |
| ISSN | 1005-3026 |
| DOI | 10.12068/j.issn.1005-3026.2018.05.005 |
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| Abstract | TG111.7; 不同初始晶粒尺寸的 Hastelloy C-276合金经冷轧变形后,分别采用一次退火和二次退火方法进行热处理,其晶界特征分布采用电子背散射衍射技术进行表征.结果表明,初始较大晶粒组织有利于晶界特征分布的优化,特殊晶界比例比小尺寸晶粒组织提高了近10%,达到了78.8%,同时形成了平均尺寸为200 μm晶粒团簇组织.在相同晶粒尺寸条件下,采用二次退火工艺可以明显改善合金的晶界特征分布,∑3n晶界比例得到较大幅度的提高,并形成了良好的团簇组织.这是由于较多的非共格∑3晶界,容易产生∑9和∑27晶界,从而形成更多的三叉晶界,阻断了大角度晶界的连通性. |
|---|---|
| AbstractList | TG111.7; 不同初始晶粒尺寸的 Hastelloy C-276合金经冷轧变形后,分别采用一次退火和二次退火方法进行热处理,其晶界特征分布采用电子背散射衍射技术进行表征.结果表明,初始较大晶粒组织有利于晶界特征分布的优化,特殊晶界比例比小尺寸晶粒组织提高了近10%,达到了78.8%,同时形成了平均尺寸为200 μm晶粒团簇组织.在相同晶粒尺寸条件下,采用二次退火工艺可以明显改善合金的晶界特征分布,∑3n晶界比例得到较大幅度的提高,并形成了良好的团簇组织.这是由于较多的非共格∑3晶界,容易产生∑9和∑27晶界,从而形成更多的三叉晶界,阻断了大角度晶界的连通性. |
| Abstract_FL | Hastelloy C-276 samples with different initial grain sizes were subjected to one-step and two-step annealing heat treatments after cold-rolling process and their grain boundary character distributions(GBCDs)were characterized by electron backscatter diffraction(EBSD)techniques. The results show that the large-sized initial grains tend to optimize the GBCD. Compared with that in the small-sized grain ones, the fraction of coincident site lattice (CSL) boundary in Hastelloy C-276 samples with large-sized initial grains increases nearly 10%,which is up to 78.8%. Meanwhile,the clusters with average size of 200 μm are formed. For the samples with same-sized grains,the GBCD can be well improved by the two-step annealing treatment,where the fraction of ∑3nboundaries can be increased significantly and the better clusters can be formed. The more incoherent ∑3 boundaries, the more∑9 and∑27 boundaries can be generated,leading to the more triple junctions. Therefore, the connectivity of the high-angle grain boundary network is disrupted effectively. |
| Author | 李德富 张晓宇 郭胜利 赵宪明 |
| AuthorAffiliation | 东北大学 轧制技术及连轧自动化国家重点实验室,辽宁 沈阳 110819;北京有色金属研究总院 复合材料中心,北京 100088%东北大学 轧制技术及连轧自动化国家重点实验室,辽宁 沈阳,110819%北京有色金属研究总院 复合材料中心,北京,100088 |
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| Author_FL | LI De-fu ZHANG Xiao-yu GUO Sheng-li ZHAO Xian-ming |
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| DocumentTitle_FL | Effects of Two-Step Annealing and Initial Grain Size on the Grain Boundary Character Distributions of Hastelloy C-276 |
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| Keywords | grain boundary character distribution(GBCD) Hastelloy C-276合金 Hastelloy C-276 alloy special grain boundary 二次退火热处理 晶界特征分布 初始晶粒 特殊晶界 two-step annealing heat-treatment initial grain size |
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| Publisher | 北京有色金属研究总院 复合材料中心,北京 100088%东北大学 轧制技术及连轧自动化国家重点实验室,辽宁 沈阳,110819%北京有色金属研究总院 复合材料中心,北京,100088 东北大学 轧制技术及连轧自动化国家重点实验室,辽宁 沈阳 110819 |
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| Snippet | TG111.7; 不同初始晶粒尺寸的 Hastelloy C-276合金经冷轧变形后,分别采用一次退火和二次退火方法进行热处理,其晶界特征分布采用电子背散射衍射技术进行表征.结果表明,初始较大晶粒组织有利于晶界特征分布的优化,特殊晶界比例比小尺寸晶粒组织提高了近10%,达到了78.8%,同时形成了平均尺寸为200... |
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| Title | 分步退火及初始晶粒对Hastelloy C-276合金晶界特征分布影响 |
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