Fracture Toughness in the Transition Temperature Region

Abstract:

Article Preview

The steels fracture toughness was measured at two different temperature T= - 60°C and T = -90°C, at v=0.02 mm/min and v=0.5mm/min. The following steels: CrMoV, 20MnMoNi55, A533B and A508 were tested with three different sizes of CT specimens 50 and 100 and 200. Those steels are weldable, although the authors investigated the fracture behaviour of base material. In order to satisfy statistical analyses, a large number of specimens were tested. Fracture behaviour has turned out to be typical, S-shaped curve for transitional fracture at low temperatures. Apart from the other variables, specimen’s width significantly affects measured toughness. Smaller specimens, CT50, might be considered of upper bound reliability while the CT200 specimens were shown to be the most conservative. In this way it has been shown that wider specimens are more reliable in a fracture assessment of the examined steels. In this paper, the fracture probabilities of specimens in function of fracture toughness were determined as well, and it could be concluded that the widest specimens are the most likely to be broken for the same values of the fracture toughness.

Info:

Periodical:

Edited by:

Nicușor Alin Sîrbu and Aurel Valentin Bîrdeanu

Pages:

92-97

Citation:

E. Džindo et al., "Fracture Toughness in the Transition Temperature Region", Advanced Materials Research, Vol. 1146, pp. 92-97, 2018

Online since:

April 2018

Export:

Price:

$38.00

* - Corresponding Author

[1] Sekban, S.M. Aktarer, P. Xue, Z.Y. Ma, G. Purcek, Impact Toughness of Friction Stir Processed Low Carbon Steel Used in Shipbuilding,, Materials Science and Engineering: A Volume 672, August 2016, Pages 40-48.

DOI: https://doi.org/10.1016/j.msea.2016.06.063

[2] Heerens, J., Read, D.T., Fracture Behaviour of a Pressure Vessel Steel in the Ductile-to-Brittle Transition Region,, NIST, Boulder, (1988).

DOI: https://doi.org/10.6028/nist.ir.88-3099

[3] Morland, E., Ingham, T., Swan, D., The Effect of Specimen Geometry on Fracture Toughness (KIC) in Lower Shelf Regime,, NRL-R-1002(R), NRL Risley, UKAEA, (1989).

[4] Morland, E., The Effect of Side-Grooving on the Fracture Toughness of A533B-1 Steel in the Transition Regime,, NRL-R-10068(R), NRL Risley, UKAEA, (1988).

[5] McCabe, D.E., A Comparison of Weibull and βIc, Analysis of Transition Range Data,, in Fracture Mechanics: Twenty-Third Symposium, ASTM STP 1189, R. Chona, Ed., ASTM, Philadelphia, 1993, pp.80-94.

[6] JSPS/MPC Round Robin on Fracture Toughness in the Transition Rangion, Indianapolis, (1991).

[7] Ingham. T., Knee, N., Milne, I, and Morland, E., Fracture Toughness in the Transition Regime for A533B-1 Steel: Prediction of Large Specimen Results from Specimen Tests,, ND-R-1354(R), UKAEA, Risley, (1987).

DOI: https://doi.org/10.1520/stp18833s

[8] Sangho K.,Byoungchul H., Sunghak L., Analysis of fracture toughness in the transition-temperature region of an Mn-Mo-Ni low-alloy steel,, Metallurgical and Materials Transactions A, June 2003, Volume 34, Issue 6, p.1275–1281.

DOI: https://doi.org/10.1007/s11661-003-0238-2

[9] S. Lee, S. Kim, B. Hwanga, B. S. Lee, C. G. Lee, Effect of carbide distribution on the fracture toughness in the transition temperature region of an SA 508 steel,, Acta Materialia 50 (2002) 4755–4762.

DOI: https://doi.org/10.1016/s1359-6454(02)00313-0

Fetching data from Crossref.
This may take some time to load.