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Re-recognition of the Effects of Phosphorus and Boron on the γ'' and γ' Phases in IN718 Alloy
Alternative TitleRe-recognition of the Effects of Phosphorus and Boron on the γ'' and γ' Phases in IN718 Alloy
Zhang Anwen; Li Yang; Zhang Sha; Liu Fang; Zhang Weihong; Yu Lianxu; Sun Wenru
2019
Source PublicationActa Metallurgica Sinica(English Letters)
ISSN1006-7191
Volume32Issue:3Pages:372-380
AbstractThe effects of P and B on the matrix strength and precipitations of γ' and γ'' phases in the grain interior were re-recognized in this study. The combination addition of P and B markedly accelerated the precipitations of γ' and γ'' phases and strengthened the matrix of IN718 alloy when air-cooled from high temperature, while made no difference when waterquenched from high temperature. The effect of single addition of P on the precipitations of γ'' and γ' phases was the same with that of the combination addition of P and B, while the single addition of B had no effect on the precipitations of the two phases. Therefore, it was P rather than B which accelerated the precipitations of γ' and γ'' phases. P could take part in the precipitations of γ' and γ'' phases, which was revealed by electrochemical extraction and quantitative analysis of chemical composition. It also revealed that P atoms were dissolved in the c matrix to a relatively high degree at the temperature that γ' and γ'' phases began to precipitate, and consequently the precipitations of γ' and γ'' phases were accelerated. The first-principle calculation indicated that P decreased the formation enthalpies of γ' and γ'' phases when it occupied the Ni lattice sites in the two phases, which explained the effect of P on the γ' and γ'' phases.
Other AbstractThe effects of P and B on the matrix strength and precipitations of γ' and γ'' phases in the grain interior were re-recognized in this study. The combination addition of P and B markedly accelerated the precipitations of γ' and γ'' phases and strengthened the matrix of IN718 alloy when air-cooled from high temperature, while made no difference when waterquenched from high temperature. The effect of single addition of P on the precipitations of γ'' and γ' phases was the same with that of the combination addition of P and B, while the single addition of B had no effect on the precipitations of the two phases. Therefore, it was P rather than B which accelerated the precipitations of γ' and γ'' phases. P could take part in the precipitations of γ' and γ'' phases, which was revealed by electrochemical extraction and quantitative analysis of chemical composition. It also revealed that P atoms were dissolved in the c matrix to a relatively high degree at the temperature that γ' and γ'' phases began to precipitate, and consequently the precipitations of γ' and γ'' phases were accelerated. The first-principle calculation indicated that P decreased the formation enthalpies of γ' and γ'' phases when it occupied the Ni lattice sites in the two phases, which explained the effect of P on the γ' and γ'' phases.
KeywordIN718 superalloy Phosphorus and boron γ'' and γ' phases Hardness
Indexed ByCSCD
Language英语
CSCD IDCSCD:6445696
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/153654
Collection中国科学院金属研究所
Affiliation中国科学院金属研究所
Recommended Citation
GB/T 7714
Zhang Anwen,Li Yang,Zhang Sha,et al. Re-recognition of the Effects of Phosphorus and Boron on the γ'' and γ' Phases in IN718 Alloy[J]. Acta Metallurgica Sinica(English Letters),2019,32(3):372-380.
APA Zhang Anwen.,Li Yang.,Zhang Sha.,Liu Fang.,Zhang Weihong.,...&Sun Wenru.(2019).Re-recognition of the Effects of Phosphorus and Boron on the γ'' and γ' Phases in IN718 Alloy.Acta Metallurgica Sinica(English Letters),32(3),372-380.
MLA Zhang Anwen,et al."Re-recognition of the Effects of Phosphorus and Boron on the γ'' and γ' Phases in IN718 Alloy".Acta Metallurgica Sinica(English Letters) 32.3(2019):372-380.
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