Portevin-Le Chatelier (PLC) effect induced by different deformation mechanisms in Ni-25Mo-8Cr alloy during high-temperature tensile deformation
文献类型：期刊论文
| 作者 | Yang, Ming1,6; Luo, Tao1; Lei, Lei2,3; Jiang, Yun1; Wang, Pan-Zhi4; Xu, Fa-Hong5 |
| 刊名 | RARE METALS
 |
| 出版日期 | 2024-07-27 |
| 页码 | 17 |
| 关键词 | Ni-Mo-Cr superalloy Pt2Mo precipitates PLC effect Deformation mechanism |
| ISSN号 | 1001-0521 |
| DOI | 10.1007/s12598-024-02908-1 |
| 通讯作者 | Lei, Lei(leileiacute@126.com) ; Jiang, Yun(j_yun7907@163.com) |
| 英文摘要 | Uniaxial tensile testing explored the Portevin-Le Chatelier (PLC) effect in nickel-based superalloys featuring high Mo/Cr mass ratios, focusing on the influence of variations in the initial microstructure on the deformation behavior at room and elevated temperatures. Experimental results indicated that the PLC effect was observed solely in the high-temperature tensile curves. However, the deformation mechanisms and characteristics of the PLC effect varied with different initial microstructures. Solid solution (SS) and over-aged (OA) samples exhibited C-type serrations, while under-aged (UA) and peak-aged (PA) specimens, featuring short- and long-range ordered phases, respectively, exhibited A + B type serrations in their tensile curves. Microstructural evolution from the SS to the UA, PA and OA states changed their stacking fault energy (SFE), leading to a sequential transformation in the plastic deformation mechanisms during high-temperature tensile deformation: stacking fault (SF) -> nanotwin -> microtwin -> SF. C-type serrations in the SS samples were associated with high solute-atom contents and SF formation. The PLC effects in the UA and PA samples were predominantly caused by solute atom pinning dislocations. Although precipitates and twins were not the primary drivers of the PLC effect, they impeded dislocation migration, exacerbated solute-atom segregation and enhanced dislocation pinning, generating A + B-shaped serrations. In the OA specimens, precipitated phases induced interfacial mismatch under thermal-force coupling. SF shearing of the precipitated phase and subsequent re-dissolution facilitated the formation of C-type serrations, whose PLC effect was induced by the combined action of dynamic strain aging (DSA), SFs of the matrix and diffusion-controlled pseudo-locking mechanisms. |
| 资助项目 | Guizhou Provincial Key Technology RD Program[[2022] 052] |
| WOS研究方向 | Materials Science ; Metallurgy & Metallurgical Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:001279131900004 |
| 出版者 | NONFERROUS METALS SOC CHINA |
| 资助机构 | Guizhou Provincial Key Technology RD Program |
| 源URL |  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 通讯作者 | Lei, Lei; Jiang, Yun |
| 作者单位 | 1.Guizhou Univ, Sch Mat & Met, Guiyang 550025, Peoples R China 2.Yangtze Univ, Sch Phys & Optoelect Engn, Jingzhou 434023, Peoples R China 3.Northwestern Polytech Univ, State Key Lab Solidificat Proc, Xian 710072, Peoples R China 4.Chinese Acad Sci, Shi Changxu Innovat Ctr Adv Mat, Inst Met Res, Shenyang 110016, Peoples R China 5.Guizhou Special Equipment Inspection & Testing Ins, Guiyang 550025, Peoples R China 6.Wuhan Univ, Sch Power & Mech Engn, Wuhan 430072, Peoples R China |
| 推荐引用方式 GB/T 7714 | Yang, Ming,Luo, Tao,Lei, Lei,et al. Portevin-Le Chatelier (PLC) effect induced by different deformation mechanisms in Ni-25Mo-8Cr alloy during high-temperature tensile deformation[J]. RARE METALS,2024:17. |
| APA | Yang, Ming,Luo, Tao,Lei, Lei,Jiang, Yun,Wang, Pan-Zhi,&Xu, Fa-Hong.(2024).Portevin-Le Chatelier (PLC) effect induced by different deformation mechanisms in Ni-25Mo-8Cr alloy during high-temperature tensile deformation.RARE METALS,17. |
| MLA | Yang, Ming,et al."Portevin-Le Chatelier (PLC) effect induced by different deformation mechanisms in Ni-25Mo-8Cr alloy during high-temperature tensile deformation".RARE METALS (2024):17. |
入库方式： OAI收割
来源：金属研究所
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