Description of flow behavior and changes in grain size and structure of API-5CT-L80 steel in hot deformation process

Document Type : Original Articles

Authors

Hamidreza Rezaei Ashtiani ¹

H Ahmadi ²

GH Ebrahimi ³

m heidari ²

¹ Mechanical Engineering, Arak University of Technology

² Department of Mechanical Engineering, Aligudarz Branch, Islamic Azad University, Aligudarz, Iran.

³ Department of Materials Science and Metallurgical Engineering, Engineering Faculty, Ferdowsi University of Mashhad, Mashhad, Iran

10.22067/jmme.2023.84024.1122

Abstract

Knowing the behavior of hot deformation and microstructure changes of API-5CT-L80 alloy steel is of great importance in the production of oil and gas industry pipes. For this purpose, in this research, the thermomechanical behavior of this steel was investigated by isothermal hot compression test in the temperature range of 1173 to 1373 K and strain rates of 0.001 to 1 s-1 s. The experimental results showed that the hot deformation behavior of steel is a softening behavior caused by the dynamic recrystallization phenomenon that in some conditions, the material shows complex behavior in the form of multi-peaked curves. The results of the microstructural investigation showed that with the increase in the deformation temperature, the formed grains have a larger size compared to the low temperature state, and more martensite phases are formed, which are more elongated martensite blades compared to the phases formed at low temperatures. The effect of strain rate was also significant like the effect of temperature because the rate of deformation had an inverse effect on grain growth, so recrystallized grains have enough time to grow at low strain rates. At high strain rates, the pearlite phases appeared more polygonal, and very small nucleation were observed in the austenitic boundaries of the ferrite and Wiedmannstein phase, which did not have enough time to grow, and at high strain rates, the martensite blades also tend to thin.

Keywords

Hot deformation

API-5CT-L80 alloy steel

Flow stress

Grain size

Microstructure

Subjects

• Metal Forming

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References

[1]   H. R. Rezaei Ashtiani, M.H. Parsa and H. Bisadi, "Constitutive equations for elevated temperature flow behavior of commercial purity aluminum", Materials Science and  Engineering :A ,Vol. 545, pp. 61–67, 2012.

[2]   S. B. Brown, K. H. Kim and L. Anand, "An internal variable constitutive model for hot working of metals",  Materials Science, Engineering. Vol. 5, pp. 95–130, 1989.

[3]   Y. feng XIA, W. JIANG, Q. CHENG, L. JIANG, L. JIN, "Hot deformation behavior of Ti—6Al—4V—0.1Ru alloy during isothermal compression", Trans. Nonferrous Met. Soc. China (English Ed. 30), Vol. 237, No. 2, pp. 134–146, 2020.

[4]   S. Mandal, P. V. Sivaprasad, S. Venugopal, K. P. N. Murthy, "Artificial neural network modeling to evaluate and predict the deformation behavior of stainless steel type AISI 304L during hot torsion", Applied Soft computing. Vol. 9, No. 1, pp.237–244, 2009.

[5]   S. Zangeneh Najafi, A. Momeni, H. R. Jafarian, "Flow curves and microstructure of K107 tool steel subjected to compression tests at elevated temperatures", Materials Science and  Engineering :A, Vol. 732, pp. 78–90, 2018.

[6]   A. Momeni, S. Kazemi, A. Bahrani, "Hot deformation behavior of microstructural constituents in a duplex stainless steel during high-temperature straining", International Journal of Minerals, Metallurgy, and Materials, Vol. 20, pp. 953–960, 2013.

[7]   L. Xu, H. Wu, B. Xie, "An improved constitutive model for high-temperature flow behaviour of the Fe–Mn–Al duplex steel", Materials Science and Technology. (United Kingdom). Vol 34, No 7, pp. 229–241, 2018.

[8]   J. Li, J. Liu, "Strain compensation constitutive model and parameter optimization for Nb-contained 316LN", Metals (Basel). Vol. 9 , No. 2, 2019.

[9]   A. Dehghan-Manshadi, M.R. Barnett, P.D. Hodgson, "Recrystallization in AISI 304 austenitic stainless steel during and after hot deformation", Materials Science and Engineering A, Vol. 485, pp. 664–672, 2008.

[10] S. K. Rajput, G. P. Chaudhari, S. K. Nath, "Characterization of hot deformation behavior of a low carbon steel using processing maps, constitutive equations and Zener-Hollomon parameter", Thermo-Mechanical Processing of Metallic Materials, Vol. 237, pp.113-125, 2007.

[11] H. Mirzadeh, M.H. Parsa, D. Ohadi, "Hot deformation behavior of austenitic stainless steel for a wide range of initial grain size", Materials Science and Engineering: A. Vol. 569, pp. 54–60, 2013.       

[12] S. Serajzadeh, A.K. Taheri, "An investigation into the effect of carbon on the kinetics of dynamic restoration and flow behavior of carbon steels",  Mechanics of Materials. Vol.  35, pp. 653–660, 2003. 

[13] T. H. Lee, E. Shin, C. S. Oh, H. Y. Ha, S. J. Kim, "Correlation between stacking fault energy and deformation microstructure in high-interstitial-alloyed austenitic steels", Acta Materialia, Vol. 58, No. 8, pp. 3173–3186, 2010.

[14] S. A. Askariani, S. M. Hasan Pishbin, "Hot deformation behavior of Mg-4Li-1Al alloy via hot compression tests", J. Alloys Compd. Vol. 688, pp. 1058–1065, 2016.      

[15]  J. K. Kim, B.C. De Cooman, "Stacking fault energy and deformation mechanisms in Fe-xMn-0.6C-yAl TWIP steel", Materials Science and Engineering A. Vol. 676, pp. 216–231, 2016.

[16] Y. Li, Y. Koizumi, A. Chiba, "Dynamic recrystallization in biomedical Co-29Cr-6Mo-0.16N alloy with low stacking fault energy", Materials Science & Engineering A. Vol. 668, pp. 86–96, 2016.

[17] C. Zhang, L. Zhang, W. Shen, C. Liu, Y. Xia, R. Li, "Study on constitutive modeling and processing maps for hot deformation of medium carbon Cr-Ni-Mo alloyed steel", Materials & Design. Vol. 90, pp. 804–814, 2016.

[18] C. Sommitsch, W. Mitter, "On modelling of dynamic recrystallisation of fcc materials with   low stacking fault energy", Acta Materialia. Vol. 54, No. 2, pp. 357–375, 2006.

[19] S. E. Tabatabaee, S. H. Mousavi-Anijdan, H. Najafi, "Hot deformation mechanisms,  mechanical properties and microstructural evolution of a HP-Nb steel", Materials Science and Engineering: A. Vol.  800, 2021.

[20] T. Sakai, A. Belyakov, R. Kaibyshev, H. Miura, J. J. Jonas, "Dynamic and post-dynamic recrystallization under hot, cold and severe plastic deformation conditions", Progress in Materials Science. Vol. 60, pp. 130–207, 2014.

[21] A. Momeni, S. Kazemi, A. Bahrani, "Hot deformation behavior of microstructural constituents in a duplex stainless steel during high-temperature straining", International Journal of Minerals, Metallurgy, and Materials, Vol. 20, pp. 953–960, 2013.

[22] L. Zhou, W. Chen, S. Feng, M. Sun, B. Xu, D. Li, "Dynamic recrystallization behavior and interfacial bonding mechanism of 14Cr ferrite steel during hot deformation bonding", J. Mater. Sci. Technol. Vol.  43, pp. 92–103, 2020.

[23] X. Xu, X. Wang, J. Li, Z. Yan, D. Liu, Q. Liu, C. Shang, J. Fu, P. Shen, "Hot workability characteristics of low-density Fe–4Al–1Ni ferritic steel", Materials Science and Engineering A, Vol. 799, 2021.

[24]  H. R. Rezaei Ashtiani, A. A. Shayanpoor, "Prediction of thermo-mechanical behavior and microstructural evolution of copper considering initial grain size at elevated temperature", Materials Today Communications, Vol. 28, 2021.

[25] H. R. Rezaei Ashtiani, H. Ahmadi, M. Heidari, P. Shahsavari, "Flow Behavior and Metallurgical Phenomena of Micro-alloy Steel Under Elevated Temperature Conditions", Transactions of the Indian Institute of Metals, Vol. 75. No, 8, 2022.

[26] ASTM E 9, "Standard test methods of compression testing of metallic materials at room temperature", Annu. B. ASTM Stand. 03.01, 2000.

[27] ASTM E 209, "Standard Practice for Compression Tests of Metallic Materials at Elevated Temperatures with Conventional or Rapid Heating Rates and Strain Rates", Annu. B. ASTM Stand. 2000.

[28] Y.C. Lin, X.Y. Wu, X. M. Chen, J. Chen, D. X. Wen, J. L. Zhang, L.T. Li, "EBSD study of a hot deformed nickel-based superalloy", Journal of Alloys and Compounds. Vol. 640, pp. 101–113, 2015.

[29] H. Zhang, K. Zhang, S. Jiang, H. Zhou, C. Zhao, X. Yang, "Dynamic recrystallization behavior of a γ′-hardened nickel-based superalloy during hot deformation", Journal of Alloys and Compounds, Vol 623, pp. 374–385, 2015.

[30] Y. W. Xiao, Y. C. Lin, Y. Q. Jiang, X. Y. Zhang, G. D. Pang, D. Wang, K. C. Zhou, "A dislocation density-based model and processing maps of Ti-55511 alloy with bimodal microstructures during hot compression in α+β region", Materials Science and Engineering A, Vol. 790, 2020.

[31] C. Zhao, W. Kingkam, L. Ning, H. Zhang, L. Zhiming, "Effect of Deformation Temperature on the Microstructure and Mechanical Properties of High-Strength Low-Alloy Steel During Hot Compression", Journal of Materials Engineering and Performance. Vol. 27, No. 8, pp. 4129–4139, 2018.

[32]  A. Momeni, H. Arabi, A. Rezaei, H. Badri, S. M. Abbasi, "Hot deformation behavior of austenite in HSLA-100 microalloyed steel", Materials Science and Engineering A. Vol. 528, No. 4, pp. 2158–2163, 2011.