Hot Deformation Behavior of ATI 718Plus Alloy with Different Microstructures

doi:10.1007/s40195-021-01361-8

Abstract

Abstract:

In this work, the effect of microstructure on hot deformation behavior of ATI 718Plus (hereinafter refers to 718Plus) alloy was studied by isothermal compression test. The results showed that when the strain rate was 0.01-0.1 s^-1 with deformation temperature of 980 and 1030 °C, hot deformation behavior was mainly affected by dislocation density. Dislocation density of the air-cooling alloy was larger than that of the furnace-cooling alloy, which makes its critical strain smaller and peak stress higher than that of the furnace-cooling alloy. When the strain rate was 1 s^-1, hot deformation behavior of the alloy was mainly affected by twins and γ′ phase, and high-density deformation twins in air-cooling alloys resulted in higher critical strain. γ′ phase exists in furnace-cooling alloy, which makes its peak stress higher than that of air-cooling alloy. 718Plus alloy is sensitive to cooling rate; dislocation and γ′ phase have obvious effects on its hot deformation behavior.

Key words: 718Plus alloy, Hot deformation, Peak stress, Dynamic recrystallization, Critical strain

Chang Liu, Jianbo Zhang, Yikai Yang, Xingchuan Xia, Tian He, Jian Ding, Ying Tang, Zan Zhang, Xueguang Chen, Yongchang Liu. Hot Deformation Behavior of ATI 718Plus Alloy with Different Microstructures[J]. Acta Metallurgica Sinica (English Letters), 2022, 35(8): 1383-1396.

Figures/Tables 15

Table 1 Chemical compositions of ATI 718Plus alloy (wt%)

Fe	W	C	P	Cr	Mo	Nb	Ti	Al	Co	B	Cu	Ni
8.82	1.08	0.024	0.011	18.53	2.85	5.34	0.80	1.55	9.26	0.0072	< 0.10	Bal.

Fig. 1 Effect of cooling rate on the microstructure of ATI 718Plus alloy: a wrought, b water-cooling, c air-cooling, d furnace-cooling

Fig. 2 Effect of cooling rate on the precipitations: a water-cooling, b air-cooling, c furnace-cooling

Fig. 3 True stress-strain curves of the alloys with different initial microstructures: a air-cooling/980 °C, b furnace-cooling/980 °C, c air-cooling/1030 °C, d furnace-cooling/1030 °C

Fig. 4 Effect of microstructure on peak stress of the alloys

Fig. 5 θ-σ curves of alloys under different deformation conditions: a air-cooling/980 °C, b furnace-cooling/980 °C, c air-cooling/1030 °C, d furnace-cooling/1030 °C

Fig. 6 $\partial$ lnθ/$\partial$ ε-ε curves of alloys under different deformation conditions: a air-cooling/980 °C, b furnace-cooling/980 °C, c air-cooling/1030 °C, d furnace-cooling/1030 °C

Table 2 Critical value and peak value of alloys under different deformation conditions

Sample	$\dot{\varepsilon } $ (s^-1)	ε_c	ε_p	ε_c_/ε_p	σ_c (MPa)	σ_p (MPa)
Air-cooling/980 ℃	0.01	0.05938	0.11133	0.5334	230.63	233.44
	0.1	0.10398	0.20300	0.51221	342.38	353.30
	1	0.12646	0.33000	0.38321	405.47	435.02
Furnace-cooling/980 ℃	0.01	0.06820	0.12571	0.54252	203.40	205.80
	0.1	0.10437	0.19975	0.52250	315.87	324.81
	1	0.12303	0.28760	0.42778	414.63	459.93
Air-cooling/1030 ℃	0.01	0.03360	0.12942	0.25962	149.70	155.86
	0.1	0.04680	0.22768	0.20555	325.30	239.08
	1	0.11900	0.35870	0.33175	323.92	347.08
Furnace-cooling/1030 ℃	0.01	0.04279	0.08140	0.52567	136.96	148.33
	0.1	0.06581	0.12850	0.51214	217.57	224.78
	1	0.10490	0.21887	0.47928	362.33	375.84

Fig. 7 Microstructure of the alloy with different initial microstructures: a air-cooling /980 ℃/0.01 s-1, b furnace-cooling /980 ℃/0.01 s-1, c air-cooling /980 ℃/1 s-1, d furnace-cooling /980 ℃/1 s-1

Fig. 8 Recrystallization nucleation of the alloy: a intragranular nucleation, b grain boundary nucleation

Fig. 9 Grain diagrams of alloys under various deformation conditions: a air-cooling /980 °C/0.01 s-1, b furnace-cooling /980 °C/0.01 s-1, c air-cooling /980 °C/1 s-1, d furnace-cooling/980 °C/1 s-1

Fig. 10 Effect of cooling rates on dislocation configuration: a wrought, b water-cooling, c air-cooling, d furnace-cooling

Fig. 11 Dislocation movement: a twin boundary, b grain boundary, c second phase

Fig. 12 Cooling curves after solution treatment: a TTT, b CCT

Fig. 13 Twin morphologies: a deformation twins, b twin electron diffraction spots, c dislocation slip, d deformation twins

References 48

[1]	J. Ding, S. Jiang, Y. Li, Y. Wu, J. Wu, Y. Peng, X. He, X.C. Xia, C. Li, Y. Liu, Intermetallics. 98, 28 (2018) DOI URL
[2]	J. Wu, C. Li, Y.C. Liu, X.C. Xia, Y.T. Wu, Z.Q. Ma, H.P. Wang, Intermetallics. 109, 48 (2019) DOI URL
[3]	T. Tang, N. D′Souza, B. Roebuck, P.S. Karamched, D.M. Collins, Acta Mater. 203, 116468 (2021) DOI URL
[4]	O.M. Messe, J.S. Barnard, E.J. Pickering, P.A. Midgley, C.M.F. Rae, Philos. Mag. 94, 10 (2014)
[5]	G.A. Zickler, R. Schnitzer, R. Radis, R. Hochfellner, R. Schweins, M. Stockinger, H. Leitner, Mate. Sci. Eng. A 523, 1 (2009) DOI URL
[6]	G.A. Zickler, R. Radis, R. Schnitzer, E. Kozeschnik, M. Stockinger, H. Leitner, Adv. Eng. Mate. 12, 3 (2010)
[7]	L.T. Tang, H.Y. Zhang, Q.Y. Guo, C.X. Liu, C. Li, Y.C. Liu, Mater. Charact. 176, 111142 (2021) DOI URL
[8]	J. Li, Y.T. Wu, Y.C. Liu, Z.Q. Ma, L.M. Yu, H.J. Li, C.X. Liu, Q.Y. Guo, Mater. Charact. 169, 110547 (2020) DOI URL
[9]	J. Li, R. Ding, Q.Y. Guo, C. Li, Y.C. Liu, Z.M. Wang, H.J. Li, C.X. Liu, Mate. Sci. Eng. A 812, 141113 (2021) DOI URL
[10]	K. Chen, J.X. Dong, Z.H. Yao, T.W. Ni, M.Q. Wang, Mate. Sci. Eng. A 738, 308 (2018) DOI URL
[11]	T.W. Ni, J.X. Dong, Mate. Sci. Eng. A 700, 406 (2017) DOI URL
[12]	J. Wu, C. Li, Y.C. Liu, X.C. Xia, Z.X. Zheng, H.P. Wang, Mate. Sci. Eng. A 767, 138439 (2019) DOI URL
[13]	L.X. Ouyang, R. Luo, Y.W. Gui, Y. Cao, L.L. Chen, Y.J. Cui, H.K. Bian, K.T. Aoyagi, K.T. Yamanaka, A. Chiba, Mate. Sci. Eng. A 788, 24 (2020)
[14]	G.A. He, F. Liu, L. Huang, Z.W. Huang, L. Jiang, Mate. Sci. Eng. A 677, 496 (2016) DOI URL
[15]	X.N. Shi, Y.Y. Liu, Y.Q. Ning, J.Y. Zhang, M.T. Wang, Rare Met. (Beijing, China) 6, 613 (2019)
[16]	G.D. Zhao, X.M. Zang, J. Yuan, L. Nan, J.J. Wu, Mate. Sci. Eng.A 815, 20 (2021)
[17]	Y.S. Wu, X.Z. Qin, C.S. Wang, L.Z. Zhou, Mate. Sci. Eng. A 768, 19 (2019)
[18]	B.C. Xie, B.Y. Zhang, H. Yu, H. Yang, Q. Liu, Y.Q. Ning, Mate. Sci. Eng. A 784, 15 (2020)
[19]	C. Kienl, P. Mandal, H. Lalvani, C.M.F. Rae, Metall. Mater. Trans. A 51, 4008 (2020) DOI URL
[20]	Z.X. Zhang, S.J. Qu, A.H. Feng, J. Shen, D.L. Chen, J. Alloys Compd. 718, 170 (2017) DOI URL
[21]	P. Snopiński, M. Król, T. Tański, D. Pakuta, A. Kriz, Mater. Charact. 177, 111167 (2021) DOI URL
[22]	J.B. Zhang, C.J. Wu, Y.Y. Peng, X.C. Xia, J.A. Li, J. Ding, C. Liu, X.G. Chen, J. Dong, Y.C. Liu, J. Alloys Compd. 835, 155195 (2020) DOI URL
[23]	L. Whitmore, H. Leitner, E. Povoden, R. Raids, Mate. Sci. Eng. A 534, 1 (2012) DOI URL
[24]	K.A. Unocic, R.W. Hayes, M.G.S. Daehn, Metall. Mater. Trans. A 41, 2 (2010)
[25]	E.J. Pickering, H. Mathur, A. Bhowmik, O.M.D.M. Messe, J.S. Barnard, M.C. Hardy, R. Krakow, K. Loehnert, H.J. Stone, C.M.F. Rae, Acta Mater. 60, 6 (2012)
[26]	M.R. Ahmadi, E. Povoden, L. Whitmore, M. Stockinger, A. Falahati, E. Kozeschnik, Mate. Sci. Eng. A 608, 1 (2014) DOI URL
[27]	J.C. Li, X.D. Wu, L.F. Cao, B. Liao, Y.C. Wang, Q. Liu, Mater. Charact. 173, 110976 (2021) DOI URL
[28]	H.K. Zhang, H. Xiao, X.W. Fang, Q. Zhang, R.E. Loge, K. Huang, Mater. Des. 193, 108873 (2020) DOI URL
[29]	Y.T. Wu, Y.C. Liu, C. Li, X.C. Xia, Y. Huang, H.J. Li, H.P. Wang, J. Alloys Compd. 712, 25 (2017)
[30]	S.W. Tian, H.T. Jiang, W.Q. Guo, G.H. Zhang, S.W. Zeng, Intermetallics. 112, 106521 (2019) DOI URL
[31]	E.I. Poliak, J.J. Jonas, ISIJ Int. 43, 5 (2003)
[32]	V.C. Gonzalo, J.M. Cabrera, J.M. Prado, Metals. 10, 1 (2020) DOI URL
[33]	S.M. Lv, C.L. Jia, X.B. He, Z.P. Wan, Y. Li, X.H. Qu, Adv. Eng. Mater. 22, 12 (2020)
[34]	Y.T. Wu, Y.C. Liu, C. Li, X.C. Xia, J. Wu, H.J. Li, Intermetallics. 113, 106584 (2019) DOI URL
[35]	Y.C. Lin, X.M. Chen, D.X. Wen, M.S. Chen, Comput. Mater. Sci. 83, 15 (2014)
[36]	Q.S. Dai, Y.L. Deng, J.G. Tang, Y. Wang, Trans. Nonferrous Met. Soc. China 29, 11 (2019)
[37]	K. Huang, J. Liu, Y.D. Tao, R.H. Ding, W.R. Tian, Trans. Mater. Heat Treat. 40, 1 (2019)
[38]	F.B. Hanning, A.K. Khan, J. Andersson, O. Ojo, Weld. World 64, 3 (2020)
[39]	S. Chen, H.S. Oh, B. Gludovatz, S.J. Kim, E.S. Park, Z. Zhang, R.O. Ritchie, Q. Yu, Nat. Commun. 11, 1 (2020) DOI URL
[40]	D. Ozturk, J.M. Cabrera, J. Calvo, A. Redjaimia, J. Ghanbaja, Mater. Perform. Charact. 9, 2 (2020)
[41]	X.Q. Fu, X.L. Wu, Q. Yu, Mater. Today. NANO 3, 48 (2018)
[42]	S. Kondo, T. Mitsuma, N. Shibata, Y. Ikuhara, Sci. Adv. 2, 11 (2016)
[43]	K. Srivastava, D. Weygand, D. Caillard, P. Gumbsch, Nat. Commun. 11, 1 (2020) DOI URL
[44]	J.B. Liu, M.L. Hou, H.Y. Yang, H.B. Xie, C. Yang, J.D. Zhang, Q. Feng, L.T. Wang, L. Meng, H.T. Wang, J. Alloys Compd. 765, 560 (2018) DOI URL
[45]	Q.Q. Ding, Y. Zhang, X. Chen, X.Q. Fu, D.K. Chen, S.J. Chen, L. Gu, F. Wei, H.B. Bei, Y.F. Gao, M.R. Wen, J.X. Li, Z. Zhang, T. Zhu, R.O. Ritchie, Q. Yu, Nature. 574, 7777 (2019)
[46]	K. Jeyabalan, S.D. Catteau, J. Teixeira, G. Geandier, B. Denand, J. Dulcy, S. Denis, G. Michel, M. Courteaux, Materialia. 9, 100582 (2020) DOI URL
[47]	H.P. Wang, P. Lü, X. Cai, B. Zhai, J.F. Zhao, B. Wei, Mate. Sci. Eng. A 772, 138660 (2020) DOI URL
[48]	J. Wang, Z. Zhi, C.R. Weinberger, Z. Zeng, T. Zhu, S.X. Mao, Nat. Mater. 14, 6 (2015)