Repair Welding Effects on the Bending Fatigue Strength of AISI 4130 Aeronautical Steel Used in a Critical to the Flight-Safety Structure

Marcelino P. Nascimento; H.J.C. Voorwald; J.C.P. Filho; Celso Pinto Morais Pereira

doi:10.4028/www.scientific.net/MSF.636-637.1451

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Repair Welding Effects on the Bending Fatigue Strength of AISI 4130 Aeronautical Steel Used in a Critical to the Flight-Safety Structure

Abstract:

The aim of this study was to analyze the effect of successive TIG (tungsten inert gas) welding repairs on the reverse bending fatigue strength of AISI 4130 steel, which is widely used in components critical to the flight-safety. In order to simulate the abrupt maneuvers, wind bursts, motor vibration and helixes efforts, which generate cyclic bending loadings at the welded joints of a specific aircraft component called "motor cradle", experimental reverse bending fatigue tests were carried out on specimens made from hot-rolled steel plate, 1.10 mm (0.043 in) thick, by mean of a SCHENK PWS equipment, with load ratio R = -1, under constant amplitude, at 30 Hz frequency and room temperature. It was observed that the bending fatigue strength decreases after the TIG (Tungsten Inert Gas) welding process application on AISI 4130 steel, with subsequent decrease due to re-welding sequence as well. Microstructural analyses and microhardness measurements on the base material, heat-affected zone (HAZ) and weld metal, as well as the effects of the weld bead geometry on the obtained results, have complemented this study.

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Materials Science Forum (Volumes 636-637)

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1451-1458

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.636-637.1451

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Online since:

January 2010

Authors:

Marcelino P. Nascimento, H.J.C. Voorwald, J.C.P. Filho, Celso Pinto Morais Pereira

Keywords:

AISI 4130 Steel, Fatigue, GTAW Process, Welding Repair on Aeronautic Structure

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References

[1] Information on: http: /www. anac. gov. br.

Google Scholar

[2] Goranson, U. G., International Journal of Fatigue Vol. 19 (1993), p. S3.

Google Scholar

[3] Payne, A. O., Engineering Fracture Mechanics Vol. 8 (1976), p.157.

Google Scholar

[4] Wenner, C. A., Drury, C. G., Inter. Journal of Industrial Ergonomics Vol. 26 (2000), p.177.

Google Scholar

[5] Latorella, K. A., Prabhu, P. V., Inter. Journal of Industrial Ergonomics Vol. 26 (2000), p.133.

Google Scholar

[6] Nascimento, M.P., Effects of TIG Welding Repair on the Structural Integrity of AISI 4130 Aeronautical Steel. PhD Thesis in Mechanical Engineering. State University of São Paulo/UNESP-FEG (in Portuguese), Code CDU 620. 92, p.240 (2004).

Google Scholar

[7] Nascimento, M.P., Voorwald H. J. C., In: Eighth International Fatigue Congress/FATIGUE 2002. Stockholm-Sweden. Vol. 5 (2002), p.3463.

Google Scholar

[8] Nascimento, M. P., Ribeiro, R. B., Voorwald, H. J. C., In: 14th European Congress on Fatigue/ECF 14, Cracow, Poland. Vol. 2, pp.1-3116 (2002).

Google Scholar

[9] Peterson, R. E., Stress Concentration Design Factors, fifth ed., John Wiley & Sons Incorporation, New York, 1966, 155p.

Google Scholar

[10] Lancaster, J. F., Metallurgy of Welding, ed., Chapman & Hall Incorporation, London, 1993, 389p.

Google Scholar

[11] Vishnu, P. R., Solid-State Transformations in Weldments. Welding, Brazing and Soldering. American Society of Metals, ASM Handbook, Metals-Park, Ohio. Vol. 6 (1984), p.70.

DOI: 10.31399/asm.hb.v06.a0001341

Google Scholar