Abstract
The effect of new ferrite present with different volume fractions and morphologies of martensite on microvoids formation and tensile fracture behaviour in dual phase steels has been studied for a steel containing 0.065% C, 1.58% Mn and 0.5% Ni. Fine and coarse dual phase microstructures were obtained from two different starting conditions. Martensite contents were kept constant at ∼18 and ∼25% and new ferrite content was varied by controlled cooling from intercritical annealing temperature of 740, 750 and 785°C. In both fine and coarse dual phase structures microvoids formed at martensite particles, inclusions and martensite-ferrite interfaces in the necked region. Martensite morphology had an influence in determining martensite cracking. Coarse and interconnected martensite distributed along ferrite grain boundaries cracked easily. Martensite cracking was less frequent and the microvoids were smaller in the fine structure than the coarse ones. Microvoid coalescence was the dominant form of fracture in both structures. The specimens with higher new ferrite contents had higher densities of voids. In these samples, voids initiated mostly by decohesion at the interface, and by some examples of fracture of martensite
Similar content being viewed by others
References
R. G. DAVIES, in “Formable HSLA and Dual Phase Steels, ” edited by A. T. Davenport (AIME, New York, 1979) p. 25.
J. Y. KOO and G. THOMAS, in “Formable HSLA and Dual Phase Steels, ” edited by A. T. Davenport (AIME, New York, 1979) p. 40.
R. D. LAWSON, D. K. MATLOCK and G. KRAUSS, in “Fundamentals of Dual Phase Steels, ” edited by R. A Kot and B. L. Bramfitt (AIME, New York, 1981) p. 347.
S. S. HANSEN and R. R. PRADHAN, in “Structure and Properties of Dual Phase Steels, ” edited by R. A. Kott and J. W. Morris (AIME, New York, 1979) p. 91.
R. G. DAVIES, Met. Trans. 9A (1978) 671.
Idem., ibid. 10A (1979) 1549.
A. R. MARDER, in “Formable HSLA and Dual Phase Steels, ” edited by A. T. Davenport (AIME, New York, 1979) p. 87.
X. L. CAI, J. FENG and W. S. OWEN, Met. Trans. 11A (1980) 1683.
X. J. HE, N. TERAO and A. BERGHEZAN, J. Mater. Sci. 18 (1984) 367.
Y. TOMOTA, Mat. Sci and Tech. 3 (1987) 415.
M. ERDOGAN and S. TEKELI, in “International Conference on Advances in Materials and Processing Technologies, ” September 2001, edited by J. M Torralba, Leganes, Madrid, Spain, p. 117.
M. ERDOGAN, S. TEKELI, O. PAMUK and A. ERKAN, Mat. Sci. and Tech., in press.
G. KRAUSS and A. R. MARDER, Met. Trans. 2A (1971) 2343.
T. JURUKUWA, H. MORIKAWA, H. TAKECHI and K. KOYAMA, in “Structure and Properties of Dual Phase Steels, ” edited by R. A. Kott and J. W. Morris (AIME, New York, 1979) p. 281.
G. S. HUPPI, D. K. MATLOCK and G. KRAUSS, Scrip. Metall 14 (1980) 1239.
M. ERDOGAN and R. PRIESTNER, Mat. Sci. and Tech. 15 (1999) 1273.
Idem., ibid. 18 (2002) 369.
E. ROBERT and D. REED-HILL, in “Physical Metallurgy Principles” (Van Nostrand, New York, 1973).
M. COSTER and J. L. CHESMONT, Int. Met. Rev. 28 (1983) 228.
R. D. LAWSON, D. K. MATLOCK and G. KRAUSS, Metallography 13 (1980) 71.
B. D. CULLITY, in “Elements of X-Ray Diffraction” (MMA, Addison-Wesley, USA, 1978) p. 411.
L. STEINBRUNNER, D. K. MATLOCK and G. KRAUSS, Met. Trans. 19A (1988) 579.
S. RASHID, in “Formable HSLA and Dual Phase Steels, ” edited by A. T. Davenport (AIME, New York, 1979) p. 1.
G. THOMAS and Y. J. KOO, in “Fundamentals of Dual Phase Steels, ” edited by R. A. Kot and B. L. Bramfitt (AIME, New York, 1981) p. 183.
M. D. GEIB, D. K. MATLOCK and G. KRAUSS, Met. Trans. 11A (1980) 1683.
P. UGGOWITZER and H. P. STUWE, Mat. Sci. and Eng. 55 (1982) 181.
A. H. NAKAGAWA and G. THOMAS, Met. Trans. 16A (1985) 831.
M. SARWAR and R. PRIESTNER, J. Mater. Sci. 31 (1996) 2091.
E. AHMAD, T. MANZOROR, K. L. ALI and J. I. AKHAR, Mat. Eng. and Per. 9 (2000) 306.
G. R. SPEICH and R. L. MILLER, in “Structure and Properties of Dual Phase Steels, ” edited by R. A. Kott and J. W. Morris (AIME, New York, 1979) p. 145.
N. K. BALLIGER, in “Advances in the Physical Metallurgy and Application of Steel” (The Metal Society, London, 1982) p. 73.
X. J. HE, N. TERAO and A. BERGHEZAN, J. Mater. Sci. 18 (1984) 367.
G. E. DIETER, in “Mechanical Metallurgy” (McGraw Hill Co., New York, 1986).
N. J. KIM and G. THOMAS, Met. Trans. 12A (1981) 483.
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Erdogan, M. The effect of new ferrite content on the tensile fracture behaviour of dual phase steels. Journal of Materials Science 37, 3623–3630 (2002). https://doi.org/10.1023/A:1016548922555
Issue Date:
DOI: https://doi.org/10.1023/A:1016548922555