Effects of Nitrogen Addition on Microstructure and Grain Boundary Microchemistry of Inconel Alloy 690
文献类型：期刊论文
| 作者 | Chen Bo; Hao Xianchao; Ma Yingche; Cha Xiangdong; Liu Kui |
| 刊名 | ACTA METALLURGICA SINICA
 |
| 出版日期 | 2017-08-11 |
| 卷号 | 53期号:8页码:983-990 |
| 关键词 | Inconel alloy 690 microstructure carbide N |
| ISSN号 | 0412-1961 |
| DOI | 10.11900/0412.1961.2016.00545 |
| 通讯作者 | Chen Bo(bchen@imr.ac.cn) |
| 英文摘要 | Inconel alloy 690 is an austenitic nickel-based corrosion resistant alloy with about 30% Cr, which is considered as the most ideal steam generator tubing materials in nuclear power plants because of its superior resistance to intergranular attack (IGA). However, the existence of impurities and the addition of minor alloying elements cause significant difference of carbide morphology, microstructure and chromium depletion of Inconel alloy 690. In this work, the microstructure and grain boundary chemistry of Inconel alloy 690 with four different nitrogen contents have been investigated by SEM and TEM. Stacking fault probability (SFP) and IGA with respect to the microstructure was tested and analyzed. The results indicated that thermal treatment at 715 degrees C following solution annealing (SA) at 1080 degrees C caused a wide range of intergranular carbide morphology with the associated chromium depletion in the vicinity of grain boundaries. With the increasing of nitrogen content, the characters of the carbides ranged from thin continuous bands along boundaries to coarse discrete particles. Stacking fault probability was increased with the increasing of nitrogen content, and the value reached the peak at 100x10(-6) of nitrogen content, then it dropped. The corrosion tests showed that moderate nitrogen content alloy performed favorable intergranular attack correlated with the presence of semi-continuous grain boundary carbide and chromium depletion was mitigated. The consequent nitrides were appeared in high nitrogen alloy. So, about 100x10(-6) contents of nitrogen in alloy 690 is suitable by synthesis considering of carbides, nitrides and chromium depletion. |
| WOS研究方向 | Metallurgy & Metallurgical Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:000409252600010 |
| 出版者 | SCIENCE PRESS |
| 源URL | [http://ir.imr.ac.cn/handle/321006/124940]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 通讯作者 | Chen Bo |
| 作者单位 | Chinese Acad Sci, Inst Met Res, Shenyang 110016, Liaoning, Peoples R China |
| 推荐引用方式 GB/T 7714 | Chen Bo,Hao Xianchao,Ma Yingche,et al. Effects of Nitrogen Addition on Microstructure and Grain Boundary Microchemistry of Inconel Alloy 690[J]. ACTA METALLURGICA SINICA,2017,53(8):983-990. |
| APA | Chen Bo,Hao Xianchao,Ma Yingche,Cha Xiangdong,&Liu Kui.(2017).Effects of Nitrogen Addition on Microstructure and Grain Boundary Microchemistry of Inconel Alloy 690.ACTA METALLURGICA SINICA,53(8),983-990. |
| MLA | Chen Bo,et al."Effects of Nitrogen Addition on Microstructure and Grain Boundary Microchemistry of Inconel Alloy 690".ACTA METALLURGICA SINICA 53.8(2017):983-990. |
入库方式： OAI收割
来源：金属研究所
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