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Download Proceedings of the 2nd World Congress on Integrated by Mei Li, Carelyn Campbell, Katsuyo Thornton, Elizabeth A. PDF

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By Mei Li, Carelyn Campbell, Katsuyo Thornton, Elizabeth A. Holm, Peter Gumbsch

This ebook represents a suite of papers provided on the second global Congress on built-in Computational fabrics Engineering (ICME), a uniqueness convention equipped through The Minerals, Metals & fabrics Society (TMS).

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Of 11th Int. Esaform Conf. on Material Forming, INSA de Lyon, Springer, (2008) [8] M. Schneider, G. Gottstein, L. Löchte, J. Hirsch. Mat. Sci. Forum 396-402 (2002), 637 [9] L. Löchte, M. Schneider, G. Gottstein. Schneider (PhD thesis, 2006, Aachen) [11] M. Wimmer, A. Cremer, S. Neumann, K. Karhausen, "Optimisation the winding of Alstrip", Light Metals, Proc. TMS 2008, New Orleans, LA, USA [12] G. Gottstein, Physikalische Grundlagen der Metallkunde, Springer Heidelberg (1998) [13] K. Lücke, K. Detert, Acta Metall.

The major contribution to the composition and temperature dependency of the SFE comes from ΔGγ→ε. The Gibbs free energy of the fcc and hcp phases for pure elements can be taken from Calphad evaluations of the appropriate systems; ΔGγ→ε is then calculated by taking the difference. However, it should be noted that the hcp phase is not a stable phase in the Fe–Mn–C (or other steel systems) and its properties cannot be directly measured. Instead, the hcp phase can be transformed as ε-martensite from the fcc phase in the range 15 to 30 wt-% Mn.

The research centre “Steel – ab initio” currently concentrates on the TWIP steels and the transition between the TWIP and the TRIP effect. Some of the investigated alloys are indicated in Table 1 with respect to chemical composition and in Figure 1 with respect to Mn content and ECO-Index. Table 1: Alloying content of exemplary HMnS, mass contents in %. 714 Tensile strength x uniform elongation, GPa x % I II III IV VII II 60 IV High Mn TRIP 40 III I Medium Mn TRIP 20 TWIP AHSS 0 0 5 10 15 20 25 30 Mn-content, mass-% Figure 1: Characteristics of new steel concepts: schematic representation of Mn-content and the tensile properties [1].

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