| Effect of cobalt on the mechanical properties of 718 base alloy with 1.2 wt % Al | |
| Yao, Xiaoyu1,2,3; Liu, Fang2; Liu, Jiaao1,2; Xin, Xin2; Qi, Feng2; Sun, Wenru2 | |
| Corresponding Author | Yao, Xiaoyu(xyyao15s@imr.ac.cn) |
| 2022-12-10 | |
| Source Publication | JOURNAL OF ALLOYS AND COMPOUNDS
 |
| ISSN | 0925-8388 |
| Volume | 926Pages:11 |
| Abstract | In this paper, the effect of Co (0-5 wt%) on the mechanical properties of 718 alloy and its strengthening mechanism were studied to clarify the function of Co on the mechanical properties of 718 base alloy. The experimental results showed that the addition of Co refined the grain. After the heat treatment, the addition of Co promoted the precipitation of Laves phase and gamma ' phase, but inhibited the precipitation of gamma '' phase. With the increasing of the Co content, the tensile strength was increased first and then decreased. It was found that the increase in the tensile strength of the alloy was caused by refining the grains and promoting the intergranular precipitation of the Laves phase. Nevertheless, Co increased the volume fraction of intragranular gamma ' phase, while suppressed the precipitation of intragranular precipitation of gamma '', thus the intragranular strength of the alloy was reduced. Accordingly, the alloy with 3 wt% Co shows the highest yield strength among the experimental alloys. Besides, the Co content extent 3 wt% will show a yield plateau under room temperature tension, but not in the case of 650 degrees C tension. It was revealed by analyzing the TEM morphology of the Laves phase in the room-temperature tensile samples and 650 degrees C tensile samples that the dislocation could shear through the intergranular Laves phase under the 650 degrees C tensile test, but it was not the case under room temperature tensile test. Therefore, the yield plateau in the stress-strain curves is due to the intergranular Laves phase impeding the dislocation motion.(c) 2022 Elsevier B.V. All rights reserved. |
| Keyword | Alloy 718 Cobalt Laves ?' ?? Mechanical properties |
| DOI | 10.1016/j.jallcom.2022.166817 |
| Indexed By | SCI |
| Language | 英语 |
| WOS Research Area | Chemistry ; Materials Science ; Metallurgy & Metallurgical Engineering |
| WOS Subject | Chemistry, Physical ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering |
| WOS ID | WOS:000848442300003 |
| Publisher | ELSEVIER SCIENCE SA |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/175047 |
| Collection | 中国科学院金属研究所 |
| Corresponding Author | Yao, Xiaoyu |
| Affiliation | 1.Univ Sci & Technol China, Coll Mat Sci & Engn, Shenyang 110016, Peoples R China 2.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China 3.72 Wenhua Rd, Shenyang, Peoples R China |
| Recommended Citation GB/T 7714 | Yao, Xiaoyu,Liu, Fang,Liu, Jiaao,et al. Effect of cobalt on the mechanical properties of 718 base alloy with 1.2 wt % Al[J]. JOURNAL OF ALLOYS AND COMPOUNDS,2022,926:11. |
| APA | Yao, Xiaoyu,Liu, Fang,Liu, Jiaao,Xin, Xin,Qi, Feng,&Sun, Wenru.(2022).Effect of cobalt on the mechanical properties of 718 base alloy with 1.2 wt % Al.JOURNAL OF ALLOYS AND COMPOUNDS,926,11. |
| MLA | Yao, Xiaoyu,et al."Effect of cobalt on the mechanical properties of 718 base alloy with 1.2 wt % Al".JOURNAL OF ALLOYS AND COMPOUNDS 926(2022):11. |
| Files in This Item: | There are no files associated with this item. | |||||
Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.
Edit Comment