Study on Formation Mechanism of Necklace Structure in Discontinuous Dynamic Recrystallization of Incoloy 028

doi:10.11900/0412.1961.2017.00461

Acta Metall Sin

2018, Vol. 54

Issue (7): 969-980 DOI: 10.11900/0412.1961.2017.00461

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Study on Formation Mechanism of Necklace Structure in Discontinuous Dynamic Recrystallization of Incoloy 028

Xiting ZHONG¹, Lei WANG^1,², Feng LIU¹(

)

1 State Key Lab of Solidification Processing, Northwestern Polytechnical University, Xi'an 710072, China
2 Tubular Goods Research Institute of CNPC, Xi'an 710077, China

Cite this article:

Xiting ZHONG, Lei WANG, Feng LIU. Study on Formation Mechanism of Necklace Structure in Discontinuous Dynamic Recrystallization of Incoloy 028. Acta Metall Sin, 2018, 54(7): 969-980.

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Abstract

During hot deformation, discontinuous dynamic recrystallization (DDRX) taking place by nucleation and growth in materials with low to medium stacking fault energies (SFEs), plays a crucial role in grain refinement, especially for the material with coarse grains. In order to study the formation mechanism of typical microstructure (necklace structure) during DDRX, the behavior of Incoloy 028 alloy at temperature range of 1000~1150 ℃ and the strain rates of 0.001~1 s^-1 was investigated by means of thermodynamic simulation, EBSD and TEM. The results show that with the decrease of deformation temperature or the increase of strain rate, the mechanism of DDRX is transformed from the traditional type nucleating at triple junctions, into necklace structure which dominated by the multilayer nucleation mechanism. The first strand of recrystallized grain is nucleated through the bulging of serrated grain boundaries which is assisted by twinning at the back of the fluctuation. With the increase of the true strain, the large strain gradient in the deformation band develops rapidly resulting in the transformation of the subgrain boundary into a high angle grain boundary, and then the second/followed layer nucleation occurs by the rotation of subboundaries accompanied with nucleation at triple junction. Twin boundaries are formed by strain-induced grain boundaries migration and disappeared after nucleation to enhance the recrystallization grain boundary mobility, and then formed again during growth to lower the interfacial energy of the system.

Key words: hot deformation discontinuous dynamic recrystallization necklace structure twin boundary subgrain boundary

Received: 01 November 2017

ZTFLH:

TG146.4

Fund: Supported by National Natural Science Foundation of China (No.51431008), National Key Research and Development Program of China (Nos.2017YFB0703001 and 2017YFB0305100) and Research Fund of the State Key Laboratory of Solidification Processing (No.117-TZ-2015)

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https://www.ams.org.cn/EN/10.11900/0412.1961.2017.00461 OR https://www.ams.org.cn/EN/Y2018/V54/I7/969

Fig.1 Initial microstructure of Incoloy 028 alloy

Fig.2 Flow stress curves of Incoloy 028 alloy at the strain rates

(ε ˙)

of 0.001 s^-1 (a), 0.01 s^-1 (b), 0.1 s^-1 (c) and 1 s^-1 (d) (ε_p—peak strain, σ_p—peak stress, ε_s—steady-state strain, σ_s—steady-state stress)

Fig.3 Microstructures of Incoloy 028 alloy deformed at

ε ˙

=0.1 s^-1, ture strain of 0.916 and the temperatures of 1000 ℃ (a), 1050 ℃ (b), 1100 ℃ (c) and 1150 ℃ (d) (D_s—steady-state grain size)

Fig.4 Microstructures of Incoloy 028 alloy deformed at 1100 ℃, ture strain of 0.916 and strain rates of 0.001 s^-1 (a), 0.01 s^-1 (b), 0.1 s^-1 (c) and 1 s^-1 (d)

Fig.5 TEM images of Incoloy 028 alloy deformed to true strain of 0.916 under the deformation of 1050 ℃, 0.001 s^-1 (a, b) and 1050 ℃, 0.1 s^-1 (c, d) (Inset in Fig.5c shows the local enlarged image)

Fig.6 Microstructural evolution of Incoloy 028 alloy at T=1150 ℃ and

ε ˙

=0.01 s^-1 with the true strains of ε=0.15 (a), ε=0.32 (b), ε=0.6 (c) and ε=0.916 (d) (The compression axis (C.A.) is shown in Fig.6d; the white, black and red lines represent grain boundaries with misorientation angles (θ): <15° (sub-boundaries), >15° and twin boundaries, respectively)

Fig.7 Microstructural evolution of Incoloy 028 alloy at T=1100 ℃ and

ε ˙

=1 s^-1 with the true strains of ε=0.25 (a), ε=0.35 (b), ε=0.6 (c) and ε=0.916 (d) (The white, black and red lines represent grain boundaries with θ<15°, θ>15° and twin boundaries, respectively; arrows in Fig.7c indicate the nucleation sites)

Fig.8 OIM maps (a, c) and corresponding orientation analyses along lines (b, d) of Incoloy 028 alloy deformed at T=1150 ℃,

ε ˙

=0.01 s^-1 and ε=0.15 (a, b) and ε=0.32 (c, d)

Fig.9 OIM maps (a, c, e) and orientation analyses alone lines (b, d, f) of Incoloy 028 alloys deformed at T=1100 ℃,

ε ˙

=1 s^-1 and ε=0.25 (a, b), ε=0.35 (c, d) and ε=0.6 (e, f)

Fig.10 Misorientation angle distributions (a, b) and twin boundary density as a function of true strain (c) of the Incoloy 028 alloy deformed at T=1150 ℃,

ε ˙

=0.01 s^-1 (a) and T=1100 ℃,

ε ˙

=1 s^-1 (b)

[1]	Humphrey F J, Hatherly M.Recrystallization and Related Annealing Phenomena [M]. 2nd Ed., Oxford: Pergamon Press, 2004: 427
[2]	Sakai T, Belyakov A, Kaibyshev R, et al.Dynamic and post-dynamic recrystallization under hot, cold and severe plastic deformation conditions[J]. Prog. Mater. Sci., 2014, 60: 130
[3]	Sakai T, Jonas J J.Dynamic recrystallization: Mechanical and microstructural considerations[J]. Acta Metall., 1984, 32: 189
[4]	Jonas J J, Sellars C M, Tegart W J M. Strength and structure under hot-working conditions[J]. Metall. Rev., 1969, 14: 1
[5]	Doherty R D, Hughes D A, Humphreys F J, et al.Current issues in recrystallization: A review[J]. Mater. Sci. Eng., 1997, A238: 219
[6]	Huang K, Logé R E.A review of dynamic recrystallization phenomena in metallic materials[J]. Mater. Des., 2016, 111: 548
[7]	Huang K, Marthinsen K, Zhao Q L, et al.The double-edge effect of second-phase particles on the recrystallization behaviour and associated mechanical properties of metallic materials[J]. Prog. Mater. Sci., 2018, 92: 284
[8]	Ponge D, Gottstein G.Necklace formation during dynamic recrystallization: Mechanisms and impact on flow behavior[J]. Acta Mater., 1998, 46: 69
[9]	Belyakov A, Miura H, Sakai T.Dynamic recrystallization under warm deformation of polycrystalline copper[J]. ISIJ Int., 1998, 38: 595
[10]	Wusatowska-Sarnek A M, Miura H, Sakai T. Nucleation and microtexture development under dynamic recrystallization of copper[J]. Mater. Sci. Eng., 2002, A323: 177
[11]	Belyakov A, Miura H, Sakai T.Dynamic recrystallization under warm deformation of a 304 type austenitic stainless steel[J]. Mater. Sci. Eng., 1998, A255: 139
[12]	Frommert M, Gottstein G.Mechanical behavior and microstructure evolution during steady-state dynamic recrystallization in the austenitic steel 800H[J]. Mater. Sci. Eng., 2009, A506: 101
[13]	Li D F, Guo Q M, Guo S L, et al.The microstructure evolution and nucleation mechanisms of dynamic recrystallization in hot-deformed Inconel 625 superalloy[J], Mater. Des., 2011, 32: 696
[14]	Aretz W, Ponge D, Gottstein G.Evolution of necklace structures during hot compression of Ni3Al+B[J]. Scr. Metall. Mater., 1992, 27: 1593
[15]	Jafari M, Najafizadeh A.Correlation between Zener-Hollomon parameter and necklace DRX during hot deformation of 316 stainless steel[J]. Mater. Sci. Eng., 2009, A501: 16
[16]	Dudova N, Belyakov A, Sakai T, et al.Dynamic recrystallization mechanisms operating in a Ni-20%Cr alloy under hot-to-warm working[J]. Acta Mater., 2010, 58: 3624
[17]	Karduck P, Gottstein G, Mecking H.Deformation structure and nucleation of dynamic recrystallization in copper single crystals[J]. Acta Metall., 1983, 31: 1525
[18]	Brünger E, Wang X, Gottstein G.Nucleation mechanisms of dynamic recrystallization in austenitic steel alloy 800H[J]. Scr. Mater., 1998, 38: 1843
[19]	Beladi H, Cizek P, Hodgson P D.Dynamic recrystallization of austenite in Ni-30 pct Fe model alloy: Microstructure and texture evolution[J]. Metall. Mater. Trans., 2009, 40A: 1175
[20]	Zhu S Q, Yan H G, Liao X Z, et al.Mechanisms for enhanced plasticity in magnesium alloys[J]. Acta Mater., 2015, 82: 344
[21]	Azarbarmas M, Aghaie-Khafri M, Cabrera A M, et al.Dynamic recrystallization mechanisms and twining evolution during hot deformation of Inconel 718[J]. Mater. Sci. Eng., 2016, A678: 137
[22]	Miura H, Sakai T, Andiarwanto S, et al.Nucleation of dynamic recrystallization at triple junctions in polycrystalline copper[J]. Philos. Mag., 2005, 85: 2653
[23]	Beck M, Morse M, Corolewski C, et al.Understanding the effect of grain boundary character on dynamic recrystallization in stainless steel 316L[J]. Metall. Mater. Trans., 2017, 48A: 3831
[24]	Lu S Y, Kang X F.Nickel Based and Iron-Nickel Based Corrosion Resistant Alloy [M]. Beijing: Chemical Industry Press, 1989: 247(陆世英, 康喜范. 镍基及铁镍基耐蚀合金 [M]. 北京: 化学工业出版社, 1989: 247)
[25]	Charnock W, Nutting J.The effect of carbon and nickel upon the stacking-fault energy of iron[J]. Met. Sci. J., 1967, 1: 123
[26]	Vitos L, Korzhavyi P A, Johansson B.Evidence of large magnetostructural effects in austenitic stainless steels[J]. Phys. Rev. Lett., 2006, 96: 117210
[27]	Lu J, Hultman L, Holmstr?m E, et al.Stacking fault energies in austenitic stainless steels[J]. Acta Mater., 2016, 111: 39
[28]	Wang L, Liu F, Cheng J J, et al.Hot deformation characteristics and processing map analysis for nickel-based corrosion resistant alloy[J]. J. Alloys Compd., 2015, 623: 69
[29]	Wang L, Liu F, Zuo Q, et al.Processing map and mechanism of hot deformation of a corrosion-resistant nickel-based alloy[J]. J. Mater. Eng. Perform., 2017, 26: 392
[30]	Jonas J J, Quelennec X, Jiang L, et al.The Avrami kinetics of dynamic recrystallization[J]. Acta Mater., 2009, 57: 2748
[31]	Wang L, Liu F, Zuo Q, et al.Prediction of flow stress for N08028 alloy under hot working conditions[J]. Mater. Des., 2013, 47: 737
[32]	Chen L Q, Zhao Y, Xu X Q, et al.Dynamic recrystallization and precipitation behaviors of a kind of low carbon V-microalloyed steel[J]. Acta Metall. Sin., 2010, 46: 1215(陈礼清, 赵阳, 徐香秋等. 一种低碳钒微合金钢的动态再结晶与析出行为[J]. 金属学报, 2010, 46: 1215)
[33]	Zhi Y, Liu X H, Yu H L, et al.Simulation of microstructure and properties evolution of micro alloyed steel during hot deformation by cellular automaton[J]. Acta Metall. Sin., 2011, 47: 1396(支颖, 刘相华, 喻海良等. 微合金钢热变形组织与性能演变的CA模拟[J]. 金属学报, 2011, 47: 1396)
[34]	Zhao M L, Sun W R, Yang S L, et al.Hot deformation behavior of GH761 wrought Ni base superalloy[J]. Acta Metall. Sin., 2009, 45: 79(赵美兰, 孙文儒, 杨树林等. GH761变形高温合金的热变形行为[J]. 金属学报, 2009, 45: 79)
[35]	Lin Y C, Chen M S, Zhong J.Prediction of 42CrMo steel flow stress at high temperature and strain rate[J]. Mech. Res. Commun., 2008, 35: 142
[36]	Graetz K, Miessen C, Gottstein G.Analysis of steady-state dynamic recrystallization[J]. Acta Mater., 2014, 67: 58
[37]	Bay B, Hansen N, Hughes D A, et al.Evolution of f.c.c. deformation structures in polyslip[J]. Acta Metall. Mater., 1992, 40: 205
[38]	Hughes D A, Hansen N.High angle boundaries formed by grain subdivision mechanisms[J]. Acta Mater., 1997, 45: 3871
[39]	Yanushkevich Z, Belyakov A, Kaibyshev R.Microstructural evolution of a 304-type austenitic stainless steel during rolling at temperatures of 773-1273 K[J]. Acta Mater., 2015, 82: 244
[40]	Valiev R Z, Islamgaliev R K, Alexandrov I V.Bulk nanostructured materials from severe plastic deformation[J]. Prog. Mater. Sci., 2000, 45: 103
[41]	Bozzolo N, Soua? N, Logé R E.Evolution of microstructure and twin density during thermomechanical processing in a γ-γ' nickel-based superalloy[J]. Acta Mater., 2012, 60: 5056
[42]	Grube W L, Rouze S R.The origin, growth and annihilation of annealing twins in austenite[J]. Can. Metall. Q., 1963, 2: 31
[43]	Mahajan S, Pande C S, Imam M A, et al.Formation of annealing twins in f.c.c. crystals[J]. Acta Mater., 1997, 45: 2633
[44]	Meyers M A, Murr L E.A model for the formation of annealing twins in f.c.c. metals and alloys[J]. Acta Metall., 1978, 26: 951
[45]	Randle V.Twinning-related grain boundary engineering[J]. Acta Mater., 2004, 52: 4067

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