Effect of Austenite on Drawing Limit of Ferrite-Austenite Dual Phase Wire

Article Preview

Abstract:

The drawability of ferrite-austenite dual phase wires decreased with increasing volume fraction and decreasing mechanical stability of austenite. The interface of the martensite and ferrite was identified as the void nucleation site and the number density of voids increased with increasing austenite volume fraction. The plastic incompatibility at the interface was assumed to be the main reason for void nucleation. The ferrite-austenite dual phase steels could be drawn to a maximum true strain of 8.0 without intermediate heat treatment. The tensile strength of the drawn wires increased with increasing volume fraction of austenite or, in other words, with increasing volume fraction of transformed martensite.

You might also be interested in these eBooks

Info:

Periodical:

Materials Science Forum (Volumes 654-656)

Pages:

78-81

Citation:

Online since:

June 2010

Export:

Price:

Permissions CCC:

Permissions PLS:

Сopyright:

© 2010 Trans Tech Publications Ltd. All Rights Reserved

Share:

Citation:

[1] G. Langford: Metall. Trans. A, Vol. 8A (1977), p.861.

Google Scholar

[2] R. Stevenson, D.J. Bailey, and G. Thomas: Metall. Trans. A, Vol. 10A (1979), p.57.

Google Scholar

[3] A.H. Nakagawa and G. Thomas: Metall. Trans. A, Vol. 16A (1985), p.831.

Google Scholar

[4] J.H. Ahn: Ph. D. Thesis, University of California Berkeley (1987).

Google Scholar

[5] L. Sidjanin and S. Miyasato, Mater. Sci. and Technol. Vol. 5 (1989), p.1200.

Google Scholar

[6] R.L. Miller: Trans. ASM, Vol. 17 (1964) p.892.

Google Scholar

[7] S.H. Lee, S.H. Lee, S.H. Kang, H.N. Han, K.H. Oh, and H. -C. Lee: ISIJ International, Vol. 48 (2008), p.1394. Figure 7 Development of a micro-void at the interface of martensite (M) and ferrite (F).

Google Scholar

[7] (The Mn concentrations along the EDS scanning lines are given).

Google Scholar