Efeito da temperatura de recozimento intercrítico e do passe de encruamento na microestrutura e nas propriedades mecânicas de um aço médio manganês (0.09C-8Mn)
Effect of intercritical annealing temperature and skinpass rolling on the microstructure and mechanical behavior of a medium manganese steel (0.09C-8Mn)
Francislaynne Lages Dias, Aline Oliveira Vasconcelos Ferreira, Indiana Rosa Oliveira, Aline Silva Magalhães, Dagoberto Brandão Santos
Resumo
The third generation of advanced high strength steels have been developed to reach an excellent combination of strength and ductility, ensuring passengers’ safety and good conformability for automotive components. For instance, there are the medium manganese steels, that contain 4 up to 12 wt.% Mn. They exhibit an ultra-fine microstructure with a significant amount of retained austenite. This phase transforms into martensite during mechanical loading due to the TRIP effect (Transformation Induced Plasticity), which provides an attractive combination of the properties previously mentioned. This work, carried out on a pilot scale, evaluated the influence of intercritical annealing temperature on the retained austenite volume fraction of a medium Mn steel. Additionally, it was determined the necessary thickness reduction to eliminate the discontinuous yielding through an additional skin pass step. Thus, the results showed a high austenite volume fraction for all analyzed conditions and the elimination of the discontinuous yielding after skin pass with thickness reductions above 5,5%. These outcomes lead to a significant strength and ductility increase, with a high potential application in the automotive industry
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References
1 Arlazarov A, Gouné M, Bouaziz O, Hazotte A, Petitgand G, Barges P. Evolution of microstructure and mechanical properties of medium Mn steels during double annealing. Materials Science and Engineering A. 2012;542:31-39.
2 Gibbs PJ, De Moor E, Merwin MJ, Clausen B, Speer JG, Matlock DK. Austenite stability effects on tensile behavior of manganese-enriched- austenite transformation-induced plasticity steel. Metallurgical and Materials Transactions. A, Physical Metallurgy and Materials Science. 2011;42:3691-3702.
3 Zhao C, Zhang C, Cao W, Yang Z, Dong H, Weng Y. Austenite thermal stabilization through the concentration of manganese and carbon in the 0.2C-5Mn steel. ISIJ International. 2014;54:2875-2880.
4 Farahani H, Xu W, van der Zwaag S. Prediction and validation of the austenite phase fraction upon intercritical annealing of medium Mn steels. Metallurgical and Materials Transactions. A, Physical Metallurgy and Materials Science. 2015;46:4978-4985.
5 Bhattacharya D. Microalloyed steels for the automotive industry. Tecnologica em Metalurgia, Materiais e Mineração. 2014;11(4):371-382.
6 Li T, Yan S, Liu X. Investigation on Yield Point Elongation and Yield Strength of Fe–9Mn–1.5Si–1Al–0.05C WaterQuenched and Air-Quenched Steel Prior to Intercritical Annealed. Steel Research International. 2021;92:2000577.
7 Ma Y, Song W, Zhou S, Schwedt A, Bleck W. Influence of intercritical annealing temperature on microstructure and mechanical properties of a cold-rolled medium-Mn steel. Metals. 2018;8(5):357-373.
8 Tsuchida N, Tomota Y, Nagai K, Fukaura K. A simple relationship between Lüders elongation and work-hardening rate at lower yield stress. Scripta Materialia. 2006;54(1):57-60.
9 Giarola AM, Pereira PHR, Stemler PA, Pertence AEM, Campos HB, Aguilar MTP, et al. Strain heterogeneities in the rolling direction of steel sheets submitted to the skin pass: a finite element analysis. Journal of Materials Processing Technology. 2015;216:234-247.
10 Gao S, Bai Y, Zheng R, Tian Y, Mao W, Shibata A, et al. Mechanism of huge Lüders-type deformation in ultrafine grained austenitic stainless steel. Scripta Materialia. 2019;159:28-32.
11 Abbaschian R, Abbaschian L, Reed-Hill R. Physical metallurgy principles. 4th ed. Stamford: Cengage Learning; 2009. 769 p.
12 Goldman AJ. Dislocation mechanisms in the elimination of inhomogeneous deformation by temper rolling. Trans ASM. 1964;57:900-908.
13 Lee YK, Han J. Current opinion in medium manganese steel. Materials Science and Technology. 2015;31(7):842-856.
14 ASTM International. ASTM A370. Standard test methods and definitions for mechanical testing of steel products. West Conshohocken: ASTM International; 2017.
15 Arlazarov A. Evolution of microstructure and mechanical properties of medium Mn steels and their relationship. France: Université de Lorraine; 2018 [acesso em 15 jul. 2020]. Disponível em: https://hal.univ-lorraine.fr/tel-01751772
16 Li ZC, Ding H, Misra RDK, Cai ZH. Deformation behavior in cold-rolled medium-manganese TRIP steel and effect of pre-strain on the Lüders bands. Materials Science and Engineering A. 2017;679:230-239.
17 Xiong XC, Chen B, Huang MX, Wang JF, Wang L. The effect of morphology on the stability of retained austenite in a quenched and partitioned steel. Scripta Materialia. 2013;68(5):321-324.
18 Luo H, Shi J, Wang C, Cao W, Sun X, Dong H. Experimental and numerical analysis on formation of stable austenite during the intercritical annealing of 5Mn steel. Acta Materialia. 2011;30(11):1367-1377.
19 Bouaziz O, Zurob H, Huang M. Driving force and logic of development of advanced high strength steels for automotive applications. Steel Research International. 2013;84(10):937-947.
20 Yang HS, Bhadeshia HKDH. Austenite grain size and the martensite-start temperature. Scripta Materialia. 2009;60:493-495.
21 Balliger NK, Gladman T. Work hardening of dual-phase steels. Metal Science. 1981;15(3):95-108.
22 Tasan CC, Diehl M, Yan D, Bechtold M, Roters F, Schemmann L, et al. An overview of dual-phase steels: advances in microstructure-oriented processing and micromechanically guided design. Annual Review of Materials Research. 2015;45:391-421.
23 Tasan CC, Hoefnagels JPM, Diehl M, Yan D, Roters F, Raabe D. Strain localization and damage in dual phase steels investigated by coupled in-situ deformation experiments and crystal plasticity simulations. International Journal of Plasticity. 2014;63:198-210.
24 Bhadeshia HKDH. TRIP-assisted steels? ISIJ International. 2002;42(9):1059-1060.
25 Petrov R, Kestens L, Wasilkowska A, Houbaert Y. Microstructure and texture of a lightly deformed TRIP-assisted steel characterized by means of the EBSD technique. Materials Science and Engineering A. 2007;447(1-2):285-297.
26 Jacques PJ, Girault E, Mertens A, Verlinden B, Van Humbeeck J, Delannay F. The developments of cold-rolled TRIP-assisted multiphase steels. Al-alloyed TRIP-assisted multiphase steels. ISIJ International. 2001;41(9):1068-1074.
27 Finfrock CB, Clarke AJ, Thomas GA, Clarke KD. Austenite stability and strain hardening in C-Mn-Si quenching and partitioning steels. Metallurgical and Materials Transactions. A, Physical Metallurgy and Materials Science. 2020;51:2020-2025.
Submitted date:
10/18/2021
Accepted date:
04/01/2022
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