α→γ→α Transformation Texture Formation at Cold-Rolled Ultra Low Carbon Steel Surfaces

Abstract:

The influence of Mn on the surface texture formation through a®g®a transformation was investigated. After the a®g®a transformation, a weak texture was formed at the surface of ultra low carbon cold-rolled sheet steel without Mn. In contrast, a sharp <100>//ND cube texture was observed in Mn alloyed ultra low carbon steel. In order to interpret the effect of Mn two alternative mechanisms were considered : (i) one assumption attributes the occurrence of the specific surface texture to the effect of outer-surface energy (ii) and according to an alternative hypothesis the release of elastic work parallel to ND in the surface area is responsible for the observed <100>//ND surface texture.

• Periodical: Materials Science Forum (Volumes 495-497)
• Pages: 1267-1272
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.495-497.1267
• Online since: September 2005
• Authors: Naoki Yoshinaga, Leo A.I. Kestens, Bruno C. De Cooman
• Keywords: Cube Texture, IF Steel, Surface, Texture, Transformation, Ultra-Low Carbon Steel, Variant Selection, α→γ→α Transformation

References

[1] L. Kestens, J. J. Jonas, P. Van Houtte and E. Aernoudt : Orientation selection during static recrystallization of cross rolled non-oriented electrical steels, Textures and Microstructures, 26-27(1996), p.321.

DOI: 10.1155/tsm.26-27.321

[2] C. G. Dunn and J. L. Walter : Surface energies and other surface effects relating to secondary recrystallization textures in high-purity iron, zone-refined iron, and 0. 6pct Si-Fe, Trans. Met. Soc. AIME, 224(1962), p.518.

[3] O. Hashimoto, S. Satoh, T. Tanaka : Formation of α→γ→α transformation texture in sheet steel, Tetsu-to-Hagane, 66(1980), p.102.

DOI: 10.2355/tetsutohagane1955.66.1_102

[4] O. Hashimoto, S. Satoh, T. Tanaka : Effect of initial texture on α→γ→α transformation texture in sheet steel, Tetsu-to-Hagane, 66(1980), p.112.

DOI: 10.2355/tetsutohagane1955.66.1_112

[5] R. G. Aspden, J. A. Berger and H. E. Trout : Anisotropic and heterogeneous nucleation during the gamma to alpha transformation in iron, Acta. Met. 16(1968), p.1027.

DOI: 10.1016/0001-6160(68)90091-6

[6] T. Tomida and T. Tanaka : Development of (100) texture in silicon steel sheets by removal of manganese and decarburization, ISIJ Int., 35(1995), p.548.

DOI: 10.2355/isijinternational.35.548

[7] N. Yoshinaga, K. Ushioda, A. Itami and O. Akisue : α+γ and γ phases annealing in ultra low carbon sheet steels, ISIJ Int., 34(1994), p.33.

DOI: 10.2355/isijinternational.34.33

[8] N. Yoshinaga, K. Ushioda and O. Akisue : Development of deep-drawable and bake-hardenable high-strength ultra low-C steel sheets by (α+γ) and γ phase annealing, Proc. 36th MWSP Conf. on High-Strength Sheet Steels for the Automotive Industry, ISS, Baltimore, (1994).

[9] N. Yoshinaga, K. Kawasaki, H. Inoue, B. C. De Cooman and J. Dilewijns: Texture of Austenite at High Temperature in SULC Cold-Rolled Sheet Steels, Proc. of Int. Symp. on Modern LC and ULC Sheet Steels for Cold Forming : Processing and Properties, Aachen, (1998).

[10] P. Van Houtte : The MTM-FHM Software System Version 2, Users Manual, (1995).

[11] K. Foster, J. J. Kramer and G. W. Winner : Growth rates of surface energy controlled secondary grains in 3 pct Si-Fe sheets, Trans. Met. Soc. AIME, 227(1963), p.185.

[12] K. Detert : Acta Met., 7(1959), p.589.

[13] J. L. Walter : Acta Met., 7(1959), p.424.

[14] J. K. Mackenzie, A. J. W. Moore and J. F. Nicholas : J. Phys. Chem. Solids, 23(1962), p.185.

[15] E. C. Bain : Trans. AIME, 70(1924), p.25.