Fatigue Behavior of Weld Repaired AISI 4130 Aeronautic Steel Used in Critical Flight Safety Structures

Marcelino Pereira do Nascimento; Carolina Cordeiro Batista; Celso Pinto Morais Pereira; Herman Jacobus Cornelis Voorwald

doi:10.4028/www.scientific.net/AMR.891-892.1736

Paper Titles

Plastic Slip and Early Stage of Fatigue Damage in Polycrystals: Comparison between Experiments and Crystal Plasticity Finite Elements Simulations
p.1711

Wavelet-Based Feature Extraction Algorithm for Fatigue Strain Data Associated with the k-Means Clustering Technique
p.1717

Fatigue Behavior and Surface Sensitivity of Board-Shaped Sample of Powder Metallurgy FGH 96
p.1723

Prediction of Fatigue Crack Growth of Aged Hardening Al-Alloys under Variable Amplitude Loading
p.1729

Fatigue Behavior of Weld Repaired AISI 4130 Aeronautic Steel Used in Critical Flight Safety Structures
p.1736

Screw Dislocations Emitted from a Blunt Crack in a Piezoelectric Material
p.1742

Measurement and Simulation of Random Vibro-Impact Responses at Brake Guide Pins
p.1749

Fatigue Life Prediction for Caliper Guide Pin under Random Vibrational Loading
p.1755

Influence of Milling and Abrasive Waterjet Cutting on the Fatigue Behaviour of DP600 Steel Sheet
p.1761

HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 891-892Fatigue Behavior of Weld Repaired AISI 4130...

Fatigue Behavior of Weld Repaired AISI 4130 Aeronautic Steel Used in Critical Flight Safety Structures

Abstract:

Since the 1950s, fatigue is the most important project and operational consideration for both civil and military aircrafts. For some aircraft models the most loaded component is one that supports the motor: the "Motor Cradle". Because they are considered critical to the flight safety the aeronautic standards are extremely rigorous in manufacturing them by imposing a "zero index of defects" on the final weld quality (Safe Life), which is 100% inspected by Non-Destructive Testing/NDT. This study has as objective to evaluate the effects of up to four successive TIG welding repairs on the axial fatigue strength of an AISI 4130 steel. Tests were conducted on hot-rolled steel plate specimens, 0.89 mm thick, with load ratio R = 0.1, constant amplitude, at 20 Hz frequency and in room temperature, in accordance with ASTM E466 Standard. The results were related to microhardness and microstructural and geometric changes resulting fromwelding cycles.

You might also be interested in these eBooks

View Preview

Info:

Periodical:

Advanced Materials Research (Volumes 891-892)

Pages:

1736-1741

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.891-892.1736

Citation:

Cite this paper

Online since:

March 2014

Authors:

Marcelino Pereira do Nascimento, Carolina Cordeiro Batista, Celso Pinto Morais Pereira, Herman Jacobus Cornelis Voorwald

Keywords:

Airframe, HAZ, High Strength Steel (HSS), Stress Concentration Factor, TIG Welding

Export:

RIS, BibTeX

Price:

Permissions CCC:

Request Permissions

Permissions PLS:

Request Permissions

Сopyright:

Citation:

References

[1] A. O. Payne, The fatigue of aircraft structures, Engineering Fracture Mechanics Engineering Fracture Mechanics. 8 (1976) 157-203.

DOI: 10.1016/0013-7944(76)90085-0

Google Scholar

[2] M.P. Nascimento, Effects of TIG welding repair on the structural integrity of AISI 4130 aeronautical steel. Ph. D Thesis in Mechanical Engineering. State University of São Paulo/UNESP-FEG, Brazil (in Portuguese), (2004).

Google Scholar

[3] M. Carpenter, Managing the fleet: Materials degradation and its effect on aging aircraft. Amptiac, News Letter. n. 4, 5 (2001) 7–19.

Google Scholar

[4] K. Koski, J. Tikka, M. B¨ackstr ¨om, A. Siljander, S. Liukkonen, G. Marquis, An aging aircraft's wing under complex multiaxial spectrum loading: Fatigue assessment and repairing. Int. J. Fatigue. 28 (2006) 652–656.

DOI: 10.1016/j.ijfatigue.2005.06.053

Google Scholar

[5] M.P. Nascimento, H. J. C. Voorwald, An evaluation on the fatigue crack growth in re-welded AISI 4130 aeronautical steel, in: Eighth International Fatigue Congress/FATIGUE 2002. Stockholm-Sweden. 5 (2000) 3463-3472.

Google Scholar