Transactions of Materials and Heat Treatment

Title：Dynamic recrystallization analysis on austenitic stainless steel 321 alloy at different strain rates

Authors： Xie Jingtao Wang Qinjuan Wang Luyin

Unit： Fujian Chuanzheng Communications College China National Petroleum Corporation

KeyWords： stainless steel dynamic recrystallization strain rate chain structure twin crystal

ClassificationCode：TG146.4

year,vol(issue):pagenumber：2019,44(6):178-182

Abstract：

For austenitic stainless steel 321 alloy, the discontinuous dynamic recrystallization (DDRX) behavior was analyzed by EBSD and TEM methods under the deformation temperatures of 950-1250 ℃ and strain rates of 0.001-1 s-1. The results show that the more grains in the alloy occurs the recrystallization transition when the deformation temperature increases, and the size of recrystallized grains increases significantly. When the strain rate increases, the number of recrystallized grains decreases, and the size of recrystallized grains decreases obviously. However, when the temperature is higher and the strain rate is lower, the nucleation of grain occurs at the trigeminal grain boundary, and the grain boundary migrates easily. Moreover, under the condition of low temperature and high strain rate, the dense dislocation wall also has great influence on the recrystallization nucleation process. When the true strain increases gradually, the small angle boundary decreases, and more big angle boundaries and twin crystal are formed. Compared with the traditional DDRX, it can be found that the twin crystal decreases during the initial deformation stage.

Funds：

福建省中青年教师教育科研项目(JAT160721)

解婧陶（1984-），女，硕士，讲师 E-mail：liyingji136924@126.com

Reference：

［1］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（1）: 130-207.

［2］孙卫鹏，栾道成，李京筱，等. 301L不锈钢的塑性变形特征研究
［J］. 塑性工程学报，2017,24（4）：95-102.

Sun W P，Luan D C，Li J X，et al. Research on plastic deformation characteristic of 301L stainless steel
［J］. Journal of Plasticity Engineering，2017,24（4）：95-102.

［3］拓雷锋，周根树，康喜唐，等. 坯料圆角对不锈钢挤压管外表面的影响
［J］.塑性工程学报，2017,24（2）：70-74，81.

Tuo L F，Zhou G S，Kang X T,et al.Influence of billet fillet on outside surface of extrusion stainless tube
［J］.Journal of Plasticity Engineering，2017,24（2）：70-74，81.

［4］Doherty R D, Hughes D A, Humphreys F J, et al. Current issues in recrystallization:A review
［J］. Materials Science and Engineering A, 1997, 238(2):219-274.

［5］Huang K, Logé R E. A review of dynamic recrystallization phenomena in metallic materials
［J］. Materials & Design, 2016,111: 548-574.

［6］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: 284-359.

［7］Zhu S Q, Yan H G, Liao X Z, et al. Mechanisms for enhanced plasticity in magnesium alloys
［J］.Acta Mater., 2015, 82: 344-355.

［8］Azarbarmas M, Aghaie-Khafri M, Cabrera A M, et al. Dynamic re crystallization mechanisms and twining evolution during hot deformation of Inconel 718
［J］. Mater. Sci. Eng., 2016, 678: 137-152.

［9］Beck M, Morse M, Corolewski C, et al. Understanding the effect of grain boundary character on dynamic recrystallization in stainless steel 316L
［J］. Metallurgical and Materials Transactions A, 2017, 48(8):3831-3842.

［10］Lu J, Hultman L, Holmstrm E, et al. Stacking fault energies in austenitic stainless steels
［J］.Acta Mater., 2016, 111: 39-46.

［11］Wang L, Liu F, Cheng J J, et al. Hot deformation characteristics and processing map analysis for nickel-based corrosion resistant al-loy
［J］. J.Alloys Compd., 2015, 623: 69-78.

［12］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(1): 392-406.

Service：

【This site has not yet opened Download Service】【Add Favorite】