Tensile Deformation Behaviors and Damage Mechanisms of SRR99 Superalloy Bicrystals with Different Grain Boundary Misorientations
文献类型：期刊论文
| 作者 | Zhu, Gang1,2; Liu, Feng1; Li, Xiaoyang2; Pang, Jianchao2; Zhang, Zhenjun2; Li, Peng2; Zhou, Yizhou3; Zhang, Zhefeng2 |
| 刊名 | ADVANCED ENGINEERING MATERIALS
 |
| 出版日期 | 2019-02-01 |
| 卷号 | 21期号:2页码:11 |
| 关键词 | damage mechanism grain boundary misorientation in situ tensile experiment superalloy bicrystal tensile strength |
| ISSN号 | 1438-1656 |
| DOI | 10.1002/adem.201800856 |
| 通讯作者 | Pang, Jianchao(jcpang@imr.ac.cn) ; Zhang, Zhefeng(zhfzhang@imr.ac.cn) |
| 英文摘要 | To understand the intrinsic tensile influence mechanisms of grain boundary (GB) misorientations, SRR99 bicrystal superalloys with the different misorientation angles (Delta theta) of 4 degrees, 10 degrees, 16 degrees, and 18 degrees are prepared to carry out conventional and in situ tensile tests at room temperature and fracture feature analysis. With the increment of Delta theta, tensile strength and elongation to fracture show successive decrement. The fracture features exhibit two types (4 degrees and 10 degrees-18 degrees): (I) when Delta theta equals to 4 degrees, the cracks initiate and propagate along slip bands (SBs)-matrix interface. (II) As Delta theta ranges from 10 degrees to 18 degrees, the cracks initiate along the carbide-matrix interface at GBs. Interestingly, the main crack in 10 degrees bicrystal propagates first along the GB then along the SB, but completely along the GB in 16 degrees-18 degrees bicrystals. The former one is absolutely controlled by SBs, and the latter is dominated by carbides and GBs. Finally, a new parameter, defined as the cracking threshold value (Cth), is proposed to explain the tensile deformation behaviors and damage mechanisms. The new findings will beneficially provide research foundation for the further understanding fatigue damage mechanisms at high temperature. |
| 资助项目 | National Nature Science Foundation of China (NSCF)[51331007] |
| WOS研究方向 | Materials Science |
| 语种 | 英语 |
| WOS记录号 | WOS:000459216400021 |
| 出版者 | WILEY-V C H VERLAG GMBH |
| 资助机构 | National Nature Science Foundation of China (NSCF) |
| 源URL | [http://ir.imr.ac.cn/handle/321006/131981]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 通讯作者 | Pang, Jianchao; Zhang, Zhefeng |
| 作者单位 | 1.Liaoning Shihua Univ, Sch Mech Engn, 1 Dandong Rd, Fushun 113001, Peoples R China 2.Chinese Acad Sci, Inst Met Res, Mat Fatigue & Fracture Div, 72 Wenhua Rd, Shenyang 110016, Liaoning, Peoples R China 3.Chinese Acad Sci, Inst Met Res, Superalloy Div, 72 Wenhua Rd, Shenyang 110016, Liaoning, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhu, Gang,Liu, Feng,Li, Xiaoyang,et al. Tensile Deformation Behaviors and Damage Mechanisms of SRR99 Superalloy Bicrystals with Different Grain Boundary Misorientations[J]. ADVANCED ENGINEERING MATERIALS,2019,21(2):11. |
| APA | Zhu, Gang.,Liu, Feng.,Li, Xiaoyang.,Pang, Jianchao.,Zhang, Zhenjun.,...&Zhang, Zhefeng.(2019).Tensile Deformation Behaviors and Damage Mechanisms of SRR99 Superalloy Bicrystals with Different Grain Boundary Misorientations.ADVANCED ENGINEERING MATERIALS,21(2),11. |
| MLA | Zhu, Gang,et al."Tensile Deformation Behaviors and Damage Mechanisms of SRR99 Superalloy Bicrystals with Different Grain Boundary Misorientations".ADVANCED ENGINEERING MATERIALS 21.2(2019):11. |
入库方式： OAI收割
来源：金属研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。