Surfaces, Interfaces and Surface Analysis of MaterialsNo Access

SURFACE FATIGUE CRACK GROWTH BEHAVIOR FROM SMALL NOTCH IN WASPALOY

CHANG-MIN SUH

School of Mechanical Engineering, Kyungpook National University, #1370, Sankyuk-Dong, Buk-gu, Daegu, 702-701, Korea

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and

SEON-GAB KIM

School of Mechanical Engineering, Kyungpook National University, #1370, Sankyuk-Dong, Buk-gu, Daegu, 702-701, Korea

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https://doi.org/10.1142/S0217979210066173Cited by:3 (Source: Crossref)

Abstract

We investigated the surface fatigue crack behaviors including initial surface crack appearances depend on three artificial notch lengths applied with the axle load level of the maximum load, 1,103 MPa and minimum load 55.3 MPa at the stress ratio of 0.05. This load level is the F100 engine's maximum operation condition of Waspaloy. The initial cracking site in depth is started from multi-origin. The effectiveness of crack growth rate by ductile striation space measurement on the fractured surface is confirmed by the working load and the stress intensity factor range. The surface cracks of Waspaloy at room temperature in air follow the ΔK vs da/dN and db/dN relation, even though the crack length initiated early in notch size 1 mm and initiated very late in notch size 4 mm. And the ΔK vs da/dN and db/dN relation have similar slope at 3 kinds of notches.

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References

H. Kitagawaet al., Quantitative Analysis of Fatigue Process-Microcracks and Slip Lines under Cyclic Strain 678, 420 (1979). Google Scholar
J. N. Scheuring and A. F. Grandt Jr., Journal of Engineering Materials and Technology 119, 380 (1997), DOI: 10.1115/1.2812273. Crossref, Web of Science, Google Scholar
D. J. Deye and W. H. Couts, Super Waspaloy microstructure and properties 672, 601 (1979). Google Scholar
Koffer, R. W., Pennington, W. J., Richmond, F. M., The effects of heat treatment and processing variables on the stress rupture strength of Waspaloy wire, Universal cyclops, (Research and development report 58, 1956) . Google Scholar
AMS(Aerospace Material Specification) 5544E, April 15, 1980 . Google Scholar
AMS 5709D, January 15, 1981 . Google Scholar
AMS 5828C, July 15, 1981 . Google Scholar
Youri, N. Lenets and Richard S. Bellows, International Journal of Fatigue 22, 521 (2000), DOI: 10.1016/S0142-1123(00)00019-0. Crossref, Web of Science, Google Scholar
C. M. Suh and H. Kitagawa, Fatigue Fract. Engng. Mater. Struct. 9-6, 409 (1987). Web of Science, Google Scholar
J. C. Newman Jr. and I. S. Raju, ASTM STP 791, 238 (1983). Google Scholar
C. M. Suh, K. B. Yoon and N. S. Hwang, Fatigue Fract. Engng. Mater. Struct. 18-4, 515 (1995). Web of Science, Google Scholar