Re-recognition of the Effects of Phosphorus and Boron on the γ″ and γ′ Phases in IN718 Alloy

doi:10.1007/s40195-018-0786-5

Acta Metallurgica Sinica (English Letters) ›› 2019, Vol. 32 ›› Issue (3): 372-380.DOI: 10.1007/s40195-018-0786-5

所属专题： 2018-2019高温合金专辑

收稿日期:2018-04-25 修回日期:2018-06-26 出版日期:2019-03-10 发布日期:2019-02-22
作者简介:

Huan Liu is a Lecturer, Master’s Supervisor, College of Mechanics and Materials, Hohai University. He earned his Ph.D. from Southeast University in 2014 and then became a Lecturer in Hohai University. He was selected into the “Shuangchuang Program of Jiangsu Province” and “Dayu Scholars Program of Hohai University” in 2017. So far, he has published more than 30 scientific papers (indexed by SCI) and held 2 authorized Chinese patents. His papers were cited more than 200 times. His research interests mainly include design of high-strength and high ductility magnesium alloys, heat-resistant magnesium alloys, fabrication of fine-grained and ultra-fine-grained metallic materials, and biomedical materials.

Xian-Hua Chen is a Professor of Chongqing University and received his Doctor’s degree from Institute of Metal Research, Chinese Academy of Sciences in 2008. He is Director of Institute of Functional Mg Alloys in National Engineering Research Centre for Magnesium Alloys, Director of International Joint Laboratory for Light Alloys (Ministry of Education), Editorial Board of Acta Metallurgica Sinica (English Letters) (SCI). His research work is focused on new high-performance structural and functional magnesium alloys, and purification technology of magnesium alloys. He also worked in Materials Technology Laboratory of CANMET in Canada as visiting scientist during 2012-2013. He has 22 patents, 1 book and more than 60 SCI papers, including 2 science papers. His papers were cited more than 2700 times. He was awarded the Provincial and Ministerial S&T Prize in 2013, 2014 and 2017. He was the Chairman of “The 2nd China Youth Scholars Conference on Mg Alloys.”

Re-recognition of the Effects of Phosphorus and Boron on the γ″ and γ′ Phases in IN718 Alloy

An-Wen Zhang^1,², Yang Li¹, Sha Zhang¹, Fang Liu¹, Wei-Hong Zhang¹, Lian-Xu Yu¹, Wen-Ru Sun¹()

1 Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
2 College of Material Science and Engineering, University of Science and Technology of China, Shenyang 110016, China

Received:2018-04-25 Revised:2018-06-26 Online:2019-03-10 Published:2019-02-22

摘要/Abstract

Abstract:

The 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 water-quenched 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 γ 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.

Key words: IN718 superalloy, Phosphorus and boron, γ″ and γ′ phases;, Hardness

. [J]. Acta Metallurgica Sinica (English Letters), 2019, 32(3): 372-380.

An-Wen Zhang, Yang Li, Sha Zhang, Fang Liu, Wei-Hong Zhang, Lian-Xu Yu, Wen-Ru Sun. 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.

图/表 13

Table 1 Analyzed concentrations of the three master ingots (mass%)

Master alloy no.	Ni	Fe	Cr	Al	Ti	Nb	Mo	C
A	52.7	Bal.	19.18	0.64	1.11	5.22	3.05	0.058
B	52.6	Bal.	19.12	0.50	0.86	4.99	3.01	0.46
C	52.3	Bal.	19.15	0.48	0.90	5.30	3.08	0.043

Table 2 Analyzed compositions of the six alloys

Alloy no.	P (mass%)	P (atomic%)	B (mass%)	B (atomic%)
A1	0.001	0.002	0.0046	0.024
A2	0.017	0.031	0.009	0.048
B1	0.001	0.002	0.004	0.022
B2	0.001	0.002	0.010	0.054
C1	0.001	0.002	0.005	0.026
C2	0.015	0.028	0.005	0.026

Fig. 1 Sketch maps of γ′ and γ″ lattices. Reproduced with permission from [15]

Fig. 2 Typical microstructures of the alloys: a the as-cast alloy; b the homogenized alloy; c the homogenized alloys performed by “Tag” method

Fig. 3 HV micro-hardnesses of the alloys A1 and A2 cooled by WQ and AC after homogenization

Fig. 4 Alloys A1 and A2 cooled by WQ after homogenization, dark-field images of γ″ and γ′ phases and the SAED patterns with [001] zone axis: a Alloy A1, viewed along a (0 1 0) direction; b Alloy A1, viewed along a (1 1/1221/122 0) direction.; c Alloy A2, viewed along a (0 1 0) direction; d Alloy A2, viewed along a (1 1/1221/122 0) direction

Fig. 5 Alloys A1 and A2 cooled by AC after homogenization, dark-field image of γ″ and γ′ phases and the SAED patterns with [001] zone axis: a Alloy A1, viewed along a (0 1 0) direction; b Alloy A1, viewed along a (1 1/1221/122 0) direction.; c Alloy A2, viewed along a (0 1 0) direction; d Alloy A2, viewed along a (1 1/1221/122 0) direction

Fig. 6 HV micro-hardnesses of the alloys B1 and B2 cooled by WQ and AC after homogenization

Fig. 7 Bright-field images and corresponding SAED patterns of the alloys B1 and B2 cooled by AC after homogenization: a alloy B1; b alloy B2

Fig. 8 HV micro-hardnesses of the alloys C1 and C2 cooled by WQ and AC after homogenization

Fig. 9 Bright-field images and corresponding SAED patterns of the alloys C1 and C2 cooled by AC after homogenization: a alloy C1; b alloy C2

Table 3 Effect of P on the formation enthalpies of γ″ and γ′ phases calculated by first-principle calculations

Phase	Supercell	?_fH (eV/atom)
Ni₃Al (γ′)	Ni₂₄Al₈	- 0.475
	Ni₂₄Al₇-P	- 0.461
	Ni₂₃Al₈-P	- 0.508
Ni₃Nb (γ″)	Ni₂₄Nb₈	- 0.329
	Ni₂₄Nb₇-P	- 0.314
	Ni₂₃Nb₈-P (Ni-1)	- 0.339
	Ni₂₃Nb₈-P (Ni-2)	- 0.308

Fig. 10 X-ray diffraction pattern of the extractions of the alloy C2

参考文献

[1]	R. Holt, W. Wallace, Int. Met. Rev. 21, 1(1976)
[2]	S.H. Song, Y. Zhao, H. Si, Mater. Lett. 140, 20(2015)
[3]	W.R. Sun, S.R. Guo, D.Z. Lu, Z.Q. Hu, Metall. Mater. Trans. A28, 649(1997)
[4]	W.R. Sun, S.R. Guo, Z.Q. Hu, Acta Metall. Sin. (Engl. Lett.) 9,443(1996)
[5]	W.D. Cao, R. Kennedy, Superalloys, 589-597, (1996)
[6]	S.H. Song, Y. Zhao, Y. Cui, J. Sun, H. Si, J.Q. Li, Mater. Lett.182(328), 328-331 (2016)
[7]	Y.J. Li, D. Ponge, P. Choi, D. Raabe, Scripta Mater. 96, 13(2015)
[8]	X.B. Liu, J.X. Dong, B. Tang, X.H. Hu, X.S. Xie, Mater. Sci.Eng. A 270, 190 (1999)
[9]	M. Wang, J. Du, Q. Deng, Z. Tian, J. Zhu, Mater. Sci. Eng. A626, 382(2015)
[10]	W.R. Sun, S.R. Guo, J. Lee, N. Park, Y. Yoo, S. Choe, Z.Q. Hu,Mater. Sci. Eng. A 247, 173 (1998)
[11]	J.A. Horton, C.G. Mckamey. M.K. Miller, W.D. Cao, R.L. Kennedy, Superalloys 718, 625, 706 and various derivatives, in The Minerals, Metals and Materials Society, ed. by E.A. Loria(1997)
[12]	L.F. Huang, W.R. Sun, S.R. Guo, Z.Q. Hu, Rare Metal. Mater.Eng. 37, 1193(2008)
[13]	X. Liang, R. Zhang, Y. Yang, Y. Han, Superalloys, 947-956,(1994)
[14]	R. Li, M. Yao, W. Liu, X. He, Scripta Mater. 46, 635(2002)
[15]	J.T. Guo, Materials Science and Engineering for superalloys (I)(Science Press, Beijing, 2008), p. 333
[16]	Z.J. Miao, Dissertation (Shanghai Jiao Tong University, Shanghai, 2011)
[17]	M. Fisk, J. Ion, L.E. Lindgren, Comput. Mater. Sci. 82, 531(2014)
[18]	Y. Ji, Y. Lou, M. Qu, J.D. Rowatt, F. Zhang, T.W. Simpson,L.Q. Chen, Metall. Mater. Trans. A 47, 3235 (2016)
[19]	P. Peng, D.W. Zhou, J.S. Liu, R. Yang, Z.Q. Hu, Mater. Sci.Eng. A 416, 169 (2006)
[20]	S. He, P. Peng, L. Peng, Y. Chen, H. Wei, Z.Q. Hu, J. Alloy.Compd. 597, 243(2014)
[21]	S. Zhang, X. Xin, L.X. Yu, A.W. Zhang, W.R. Sun, X.F. Sun,Metall. Mater. Trans. A 47A, 4092 (2016)
[22]	L. Chang, Dissertation (University of Chinese Academy of Sciences, Bejing, 2014)
[23]	D.H. Ping, Y.F. Gu, C.Y. Cui, H. Harada, Mater. Sci. Eng. A456, 99(2007)
[24]	W. Gong, W. Zhao, N. Miao, J. Zhou, Z. Sun, S. Li, S. Gong,Comput. Mater. Sci. 144, 23(2018)
[25]	R.L. Kennedy, Superalloys 718, 625, 706 and Derivatives 2005, in TMS (The Minerals, Metals and Materials Society), ed. byE.A. Loria (2005)

Re-recognition of the Effects of Phosphorus and Boron on the γ″ and γ′ Phases in IN718 Alloy

RichHTML

PDF (PC)

可视化

摘要/Abstract

引用本文

使用本文

图/表 13

参考文献

相关文章 0

编辑推荐

Metrics

本文评价