THE RECRYSTALLIZATION OF Ni BASE DIRECTIONALLY SOLIDIFIED SUPERALLOY DZ417G
文献类型：期刊论文
| 作者 | Peng Sheng; Zhou Lanzhang; Hou Jieshan; Guo Jianting |
| 刊名 | ACTA METALLURGICA SINICA
 |
| 出版日期 | 2010-08-11 |
| 卷号 | 46期号:8页码:907-912 |
| 关键词 | directionally solidified superalloy DZ417G recrystallization mechanical property |
| ISSN号 | 0412-1961 |
| DOI | 10.3724/SP.J.1037.2010.00130 |
| 通讯作者 | Zhou Lanzhang() |
| 英文摘要 | DZ417G is a directionally solidified (DS) superalloy developed for low-pressure blade applications in gas turbine engines The crystallization microstructures of DZ417G samples caused by sand-blasting and machining were investigated. The tensile properties of the alloy after crystallization were tested at room temperature and 900 V and its stress-rupture performance was examined under conditions of 980 degrees C/216 MPa and 760 degrees C/725 MPa The results show that after solution treatment equiaxed recrystallization grains form on the surface of specimens machined from directionally solidified alloy bars After aging treatment, cellular recrystallization takes place on the surface of specimens pretreated by sand blasting Both the yield strength and tensile strength at room temperature decrease after recrystallization, while those at 900 V are slightly affected by recrystallization. The recrystallization depth increases after stress-rupture tests, which may be attributed to migration of recrystallization boundaries driven by high temperature and stress. For samples without recrystallization microstructure, the fracture mode is transgranular, which is controlled by the propagation rate of the cracks initiated both on sum face and at inner microstructure discontinuities While for samples with recrystallization microstructure: the cracks prefer to be initiated on transverse recrystallization grain boundaries and propagate along the recrystallization boundaries into the matrix, which may accelerate the propagation rate TRF (transverse recrystallization area fraction) is a factor to evaluate the effect of recrystallization on the stress-ruptured performance The stress-ruptured performance is decreased with the increase of TRF between 0 and 0.5. For samples with a TRF of 0 5, second cellular recrystallization forms in the first equiaxed recrystallization grain The cracks mitated at interfaces of cellular microstructure have a high density, which impair the stress-ruptured performance of DZ417G alloy. |
| WOS研究方向 | Metallurgy & Metallurgical Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:000281719200002 |
| 出版者 | SCIENCE CHINA PRESS |
| 源URL | [http://ir.imr.ac.cn/handle/321006/102214]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 通讯作者 | Zhou Lanzhang |
| 作者单位 | Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China |
| 推荐引用方式 GB/T 7714 | Peng Sheng,Zhou Lanzhang,Hou Jieshan,et al. THE RECRYSTALLIZATION OF Ni BASE DIRECTIONALLY SOLIDIFIED SUPERALLOY DZ417G[J]. ACTA METALLURGICA SINICA,2010,46(8):907-912. |
| APA | Peng Sheng,Zhou Lanzhang,Hou Jieshan,&Guo Jianting.(2010).THE RECRYSTALLIZATION OF Ni BASE DIRECTIONALLY SOLIDIFIED SUPERALLOY DZ417G.ACTA METALLURGICA SINICA,46(8),907-912. |
| MLA | Peng Sheng,et al."THE RECRYSTALLIZATION OF Ni BASE DIRECTIONALLY SOLIDIFIED SUPERALLOY DZ417G".ACTA METALLURGICA SINICA 46.8(2010):907-912. |
入库方式： OAI收割
来源：金属研究所
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