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Fatigue Crack Growth Behavior in Ultrafine Grained Low Carbon Steel  

Kim, Ho-Kyung (Department of Automotive engineering, Seoul National University of Technology)
Park, Myung-Il (Department of Automotive engineering, Seoul National University of Technology)
Chung, Chin-Sung (Science & technology Research Institute of Hong-Ik University)
Shin, Dong-Hyuk (Department. Of Metallurgy and Materials Science, Hanyang University)
Publication Information
Journal of Mechanical Science and Technology / v.16, no.10, 2002 , pp. 1246-1252 More about this Journal
Abstract
Ultrafine grained (UFG) low carbon (0.15 wt.% C) steel produced by equal channel angula. pressing (ECAP) was tested for investigating the effect of load ratio on the fatigue crack growth rate. Fatigue crack growth resistance and threshold of UFG steel were lower than that of asreceived coarse grained steel. It was attributed to the less tortuous crack path. The UFG steel exhibited slightly higher crack growth rates and a lower △Kth with an increase of R ratio. The R ratio effect on crack growth rates and △Kth was basically indistinguishable at lower load ratio (R >0.3), compared to other alloys, which indicates that contribution of the crack closure vanishes. The crack growth rate curve for UFG steel exhibited a longer linear extension to the lower growth rate regime than that for the coarse grained as-received steel.
Keywords
Ultrafine Grained Materials; Fatigue Crack Growth; Crack Closure Effective Stress Intensity Range;
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Times Cited By KSCI : 2  (Citation Analysis)
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1 Agnew, S. R. and Weertman, J. R., 1998, 'Cyclic Softening of Ultrafine Copper.' Materials Sci. and Eng., Vol. 244, pp. 145-153   DOI   ScienceOn
2 Agnew, S. R., Vinogradov, A. Y., Hashimoto, S. and Weertman, J. R., 1999, 'Overview of Fatigue Performance of Cu Processed by Severe Plastic Deformation,' J. of Electronic Materials, Vol. 28, No. 9, pp. 1038-1044   DOI
3 Berbon, P. B., Komura, S., Utsunomiya, A., Horita, Z., Furukawa, M., Nemoto, M. and Langdon, T. G., 1999, 'An evaluation of Superplasticity in Aluminum-Scandium Alloys Processed by Equal-Channel Angular Pressing,' Mater. Trans. JIM, Vol. 40, No 8, pp. 772-778
4 Boyce, B. L. and Ritchie, R. O., 2001, 'Effect of Load Ratio and Maximum Stress Intensity on the Fatigue Threshold in Ti-6A1-4V,' Eng. Fract. Mech., Vol. 68, pp. 129-147   DOI   ScienceOn
5 Rabinovich, M. K. and Markushev, M. V., 1995, 'Influence of Fine Grained Structure and Superplastic Deformation on the Strength of Aluminium Alloys,' J. of Mater. Sci., Vol. 30, pp. 4692-5001   DOI
6 Budianski, B. and Huchinson, J. W., 1978, 'Analysis of Closure in Fatigue Crack Growth,' J. Appl. Mech. Trans. ASME, Vol. 45, pp. 267-276   DOI   ScienceOn
7 Cho, N. I., Lee, Y. B. and Chung, C. S., 1996, 'A Study on Fatigue Behavior Considering Effects of Redistributing Tensile Residual Stress and Crack Closure in SS330 Weldment,' Transactions of the KSME {A), Vol. 20, No. 7, pp. 2234-2245
8 Elber, W., 1970, 'Fatigue Crack Closure Under Cyclic Tension,' Eng. Fract Mech., Vol. 2, pp. 37-45   DOI   ScienceOn
9 McEvely, A. J. and Ritchie, R. O., 1998, 'Crack Closure and the Fatigue-Crack Propagation Threshold as a Function of Load Ratio,' Fatigue Fract. Eng. Mater. Struct., Vol. 21, pp. 847-855   DOI
10 Vinogradov, A., Nagasaki, S., Patlan, V., Kitagawa, K. and Kawazoe, M., 1999, 'Fatigue Properties of 5056 Al-Mg Alloy Produced by Equal-Channel Angular Pressing,' NanoStructured Materials, Vol. 11, No. 7, pp. 925-934   DOI   ScienceOn
11 Park Kyung-Tae, Kim Yong-Seog, Lee Jung Gul and Shin Dong Hyuk, 2000, 'Thermal Stability and Mechanical Properties of Ultrafine Grained Low Carbon Steel,' Materials Sci. and Eng., Vol. A293, pp. 165-172   DOI   ScienceOn
12 Patlan, V., Vinogradov, A., Higashi, K. and Kitagawa, K., 2001, 'Overview of Fatigue Properties of Fine Grain 5056 Al-Mg Alloy Processed by Equal-Channel Angular Pressing,' Materials Sci. & Eng., Vol. A300, pp. 171-182   DOI   ScienceOn
13 Valiev, R. Z., Kozlov, E. V., Ivanov, Y. F., Lian, J., Nazarov, A. A. and Baudelet, B., 1994, 'Deformation Behavior of Ultrfine-Grained Copper,' Acta Metall. Mater., Vol. 42, No. 7, pp. 2467-2475   DOI   ScienceOn
14 Rice, J. R., 1967, 'Mechanics of Crack Tip Deformation and Extension by Fatigue,' ASTM STP 415, p. 247
15 Suresh, S., 1991, 'Fatigue of Materials,' Cambridge University Press