International Journal of Iron & Steel Society of Iran

International Journal of Iron & Steel Society of Iran

Mechanism of edge crack formation in AISI304L steel during hot rolling

Document Type : Research Paper

Authors
Mohammad Sadegh Dehghan Manshadi 1
Mohammadreza Zamani 2
Majede Feizy 3
1 Department of Production Technology, Iran Alloy Steel Company, Yazd, Iran
2 department of production technology, Iran Alloy Steel Company
3 Department of Mining and Metallurgical Engineering, Yazd University
10.22034/ijissi.2024.551480.1229
Abstract
In this study, the effect of delta ferrite formation and segregation of alloying elements on the mechanism of edge cracking on the surface of AISI304L stainless steel during hot rolling in Iran Alloy Steel Company was evaluated. For this purpose, scanning electron microscopy (SEM) with two detectors, SE and BSE, and EDX analysis were used to examine the areas around the crack. The results was shown that the tendency to create edge cracks during hot rolling increases with enhancement delta ferrite content and the mechanism of crack growth is along the delta ferrite and the delta ferrite/ austenite interface. SEM studies of the crack-containing specimens in showed the number of micro-cracks in the areas around the main crack and the presence of worm-shaped delta ferrites and delta ferrite islands in the austenitic matrix. In addition, the segregation of the copper element also plays an important role in creating cracks in the surface of AISI304L stainless steel ingots during hot rolling.
Keywords
AISI 316L stainless steel
Edge cracking
Delta ferrite
Hot rolling
 [1] Jonas J.J, Sellars C.M, Tegart W.J.M.C.G, Strength and structure under hot-working conditions, Metallurgical Reviews. 1969; 14(1): 1–24.
[2] Czerwinski F, Cho J.Y, Brodtka A, Zielinska-Lipiec A, Sunwoo J.H, Szpunar J.A, Journal of materials science. 1999; 34(19): 4727–35.
[3] Soleymani S, Ojo O.A, Richards N, Effect of Composition on the Formation of Delta Ferrite in 304L Austenitic Stainless Steels During Hot Deformation. Journal of materials engineering and performance. 2014; 24(1): 499–504.
[4] Elmer J.W, Allen S.M, Eagar T.W, Microstructural development during solidification of stainless steel alloys, Metallurgical transactions. 1989; 20(10): 2117–31.
[5] Rajasekhar K, Harendranath C.S, Raman R, Kulkarni S.D, Microstructural evolution during solidification of austenitic stainless steel weld metals: A color metallographic and electron microprobe analysis study, Materials Characterization. 1997; 38(2): 53–65.
[6] Sundararaman D, Divakar R, Raghunathan V.S, Microstructural features of a type 304L stainless steel deformed at 1473 K in the strain rate interval 10[sup [minus]3] s [sup [minus]1] to 10[sup 2] s[sup [minus]1], Scripta Metallurgica et Materialia; (United States) [Internet].
[7] Venugopal S, Ravishankar C, Mannan S.L, Prasad Y.V.R.K, Comments on the paper entitled “Microstructural features of a type 304L stainless steel deformed at 1473 K in the strain rate interval 10-3 to 102 s-1, Scripta metallurgica et materialia. 1994; 30(12): 1611–6.
[8] Wang Z, Fu W, Sun S, Zhiqing L.v, Zhang W, Effect of Preheating Temperature on Surface Cracking of High Nitrogen CrMn Austenitic Stainless Steel, Journal of Materials Science and Technology/Journal of materials science & technology. 2010; 26(9): 798–802.
[9] Shi F, Wang L.J, Cui W.F, Li Z.B, Xu M.Z, Liu C.M, Hot Ductility of Fe-18Cr-12Mn-0.55N High Nitrogen Austenitic Stainless Steel. Materials Science Forum [Internet]. 2008; 575-578: 1056–61.
[10] Melo M.L.N, Penhalber C.L, Pereira N.A, Pelliciari C.L, Santos C.A, Numerical and experimental analysis of microstructure formation during stainless steels solidification. Journal of Materials Science. 2007; 42(7): 2267–75.
[11] Jambor M, Vojtek T, Pavel Pokorný, Koutný D, Luboš Náhlík, Pavel Hutař, et al. Anomalous fatigue crack propagation behavior in near-threshold region of L-PBF prepared austenitic stainless steel. Materials science and engineering A, Structural materials: proporties, microstructures and processing/Materials science & engineering A, Structural materials: properties, microstructure and processing. 2023; 872: 144982–2.
[12] Mukherjee M, Tapan Kumar P, Role of microstructural constituents on surface crack formation during hot rolling of standard and low nickel austenitic stainless steels, Acta metallurgica Sinica English letters/Acta Metallurgica Sinica. 2013; 26(2): 206–16.
International Journal of Iron & Steel Society of Iran
Volume 20, Issue 2
December 2023
Pages 10-14