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A Study of Fatigue Crack Growth Behaviour for Ferrite-Bainite Dual Phase Steel
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  • Journal title : Journal of Welding and Joining
  • Volume 34, Issue 1,  2016, pp.41-46
  • Publisher : The Korean Welding and Joining Society
  • DOI : 10.5781/JWJ.2016.34.1.41
 Title & Authors
A Study of Fatigue Crack Growth Behaviour for Ferrite-Bainite Dual Phase Steel
Kim, Deok-Geun; Cho, Dong-Pil; Oh, Dong-Jin; Kim, Myung-Hyun;
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 Abstract
With the recent increase in size of ships and offshore structures, there are more demand for thicker plates. As the thickness increases, it is known that fatigue life of the structures decrease. To improve the fatigue life, post weld treatments techniques, such as toe grinding, TIG dressing and hammer peening, are typically employed. However, these techniques require additional construction time and production cost. Therefore, it is of crucial interest steels with longer fatigue crack growth life compared to conventional steels. This study investigates fatigue crack growth rate (FCGR) behaviours of conventional EH36 steel and Ferrite-Bainite dual phase EH36 steel (F-B steel). F-B steel is known to have improved fatigue performance associated with the existence of two different phases. Ferrite-Bainite dual phase microstructures are obtained by special thermo mechanical control process (TMCP). FCGR behaviours are investigated by a series of constant stress-controlled FCGR tests. Considering all test conditions (ambient, low temperature, high stress ratio), it is shown that FCGR of F-B steel is slower than that of conventional EH36 steel. From the tensile tests and impact tests, F-B steel exhibits higher values of strength and impact energy leading to slower FCGR.
 Keywords
Fatigue crack growth rate;Dual phase steel;Ferrite-Bainite;
 Language
Korean
 Cited by
 References
1.
Wen Jie Xin, Dong Jin Oh and Myung Hyum Kim, A Approach for Fillet Welded Joints, Journal of KWJS, 32-2 (2014), 37-42 (in Korean)

2.
Sung Won Kang, Myung Hyun Kim, Jae Young Choi, Wha Soo Kim and Young Min Paik, A Study on the Fatigue Strength Improvement using Weld Toe Burr Grinding, Journal of KWJS, 24-2 (2006), 42-47 (in Korean)

3.
Seung Yong Lee and Kab Soo Kyung, A Study on the Fatigue Strength Improvement of the Fillet Welded Connections with respect to Post-Weld Treatment, KSCE Journal of Civil Engineering, 28-5A (2008), 665-672 (in Korean)

4.
Jeong Woo Han and Seung Ho Han, Research for Fatigue Life Extension Techniques in Weldments via Pneumatic Hammer Peening, Journal of Mechanical Science and Technology, 33-8 (2009), 842-848 (in Korean)

5.
A. Hobbacher, Recommendations for fatigue design of welded joints and components. IIW document XIII-2151-07/XV-1254-07. WRC bulletin 520, The welding Research Council, New York, (2007)

6.
Yong Kim and Bo young Lee, Methods for Fatigue Strength Improvement of the Weld Structure (II)-Post Weld Improvement Methods-, Journal of KWJS, 30-2 (2012), 105-108 (in Korean)

7.
M. Guan and H. Yu, Fatigue crack growth behaviors in hot-rolled low carbon steels, A comparison between ferrite-pearlite and ferrite-bainite microstructures, Materials Science & Engineering A, 559 (2013), 875-881 crossref(new window)

8.
ASTM, Standard Specification for Structural Steel for Ships, ASTM A131 (2014), 1-7

9.
ASTM, Standard Test Method for Measurement of Fatigue Crack Growth Rates, ASTM E647-13 (2013), 1-50

10.
BSI, Guide to Methods for Assessing the Acceptability of Flaws in Metallic Structures, BS 7910 (2013), 1-480

11.
D.F. Laurito, C.A.R.P. Baptista, M. A. S. Torres and A. J. Abdalla, Microstructural effects on fatigue crack growth behavior of a microalloyed steel, Procedia Engineering, 2 (2010), 1915-1925 crossref(new window)