Comprehensive first-principles study of transition-metal substitution in the gamma phase of nickel-based superalloys
文献类型：期刊论文
| 作者 | Chen, WL; Xing, WW; Ma, H3,4; Ding, XY; Chen, XQ; Li, DZ; Li, YY |
| 刊名 | CALPHAD-COMPUTER COUPLING OF PHASE DIAGRAMS AND THERMOCHEMISTRY
 |
| 出版日期 | 2018-06-01 |
| 卷号 | 61页码:41-49 |
| ISSN号 | 0364-5916 |
| 关键词 | Nickel-based superalloys Fcc nickel Substitution enthalpy |
| DOI | 10.1016/j.calphad.2018.02.006 |
| 英文摘要 | In order to elucidate the role of various M-alloying additions in the fcc-type gamma phase of nickel-based superalloys, we have performed a comprehensive and systematical computation on all 3d-, 4d- and 5d-M alloying additions substituting in the Ni lattice using the same standard of the first-principles calculations within the framework of the density functional theory. The results show that the substitution enthalpies of Sc, Ti, V, Mn, Fe, Co, Zn, Zr, Nb, Hf, Ta, and Pt are negative, while the others elements have positive substitution enthalpies. To further explore the contributions of various factors to the substitution enthalpy, we have attempted to divide the substitution enthalpy into two parts. The first one is the mechanical deformation energy caused by the atomic volume change because of the M-alloying additions substituting in fcc Ni and the other one is the chemical and magnetic energy through electronic hybridizations and local magnetic interactions. It is found that the substitution enthalpy is a consequence of the balancing of these two contributions. Furthermore, we have attempted to correlate their mechanical deformation energies with metallic atomic radii of substitutional M-alloying addition with respect to Ni, and the chemical and magnetic energies with transferred charges between M-alloying addition and Ni, which are indeed associated with the so-called electronegativity difference. |
| 学科主题 | Thermodynamics ; Chemistry, Physical ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:000434001700004 |
| 源URL | [http://ir.imr.ac.cn/handle/321006/80172]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 作者单位 | 1.Northeastern Univ, Sch Met, Shenyang 110819, Liaoning, Peoples R China 2.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Liaoning, Peoples R China 3.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Liaoning, Peoples R China 4.Chinese Acad Sci, Inst Met Res, Environm Corros Ctr, Shenyang 110016, Liaoning, Peoples R China 5.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Liaoning, Peoples R China |
| 推荐引用方式 GB/T 7714 | Chen, WL,Xing, WW,Ma, H,et al. Comprehensive first-principles study of transition-metal substitution in the gamma phase of nickel-based superalloys[J]. CALPHAD-COMPUTER COUPLING OF PHASE DIAGRAMS AND THERMOCHEMISTRY,2018,61:41-49. |
| APA | Chen, WL.,Xing, WW.,Ma, H.,Ding, XY.,Chen, XQ.,...&Li, YY.(2018).Comprehensive first-principles study of transition-metal substitution in the gamma phase of nickel-based superalloys.CALPHAD-COMPUTER COUPLING OF PHASE DIAGRAMS AND THERMOCHEMISTRY,61,41-49. |
| MLA | Chen, WL,et al."Comprehensive first-principles study of transition-metal substitution in the gamma phase of nickel-based superalloys".CALPHAD-COMPUTER COUPLING OF PHASE DIAGRAMS AND THERMOCHEMISTRY 61(2018):41-49. |
入库方式： OAI收割
来源：金属研究所
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