| Tensile Deformation Behaviors and Damage Mechanisms of SRR99 Superalloy Bicrystals with Different Grain Boundary Misorientations | |
| Zhu, Gang1,2; Liu, Feng1; Li, Xiaoyang2; Pang, Jianchao2; Zhang, Zhenjun2; Li, Peng2; Zhou, Yizhou3; Zhang, Zhefeng2 | |
| Corresponding Author | Pang, Jianchao(jcpang@imr.ac.cn) ; Zhang, Zhefeng(zhfzhang@imr.ac.cn) |
| 2019-02-01 | |
| Source Publication | ADVANCED ENGINEERING MATERIALS
 |
| ISSN | 1438-1656 |
| Volume | 21Issue:2Pages:11 |
| Abstract | 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. |
| Keyword | damage mechanism grain boundary misorientation in situ tensile experiment superalloy bicrystal tensile strength |
| Funding Organization | National Nature Science Foundation of China (NSCF) |
| DOI | 10.1002/adem.201800856 |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | National Nature Science Foundation of China (NSCF)[51331007] |
| WOS Research Area | Materials Science |
| WOS Subject | Materials Science, Multidisciplinary |
| WOS ID | WOS:000459216400021 |
| Publisher | WILEY-V C H VERLAG GMBH |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/131982 |
| Collection | 中国科学院金属研究所 |
| Corresponding Author | Pang, Jianchao; Zhang, Zhefeng |
| Affiliation | 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 |
| Recommended Citation 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. |
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