This content is not included in your SAE MOBILUS subscription, or you are not logged in.
Fatigue Life of Normalized and Quenching & Tempered Stabilizer Bars
ISSN: 0148-7191, e-ISSN: 2688-3627
Published November 16, 2004 by SAE International in United States
Annotation ability available
The current study has the proposal to investigate the differences in fatigue behavior between stabilizer bar manufactured in quenched & tempered and normalized SAE5160 steels. As it known, quenched & tempered stabilizer bars have higher mechanical and fatigue strengths, on the other hand, they are more expensive. Besides that, this type of part still receives a shot peening surface treatment to improve the fatigue strength due to creation of compressive surface residual stresses and by surface plastic strain. The previous subjects have affected directly the fatigue crack nucleation, then, in order to reduce the nucleation stage and study mainly the growth stage, a micro-notch (short crack) was introduced by EDM (Electric Discharge Machine) process on samples and stabilizer bars.
The proposed experimental study consists of comparative analysis of da/dN-ΔK curves, fractographic and metallographic analyses, bench tests, and after that, it is intended to show the relevant aspects between the two microstructural classes specified for stabilizer bars and the beneficial effects obtained by shot peening process. The main objective of this paper is to show that the better performance of martensitic stabilizer bar in fatigue life could be reduced or lost when a micro-notch is present.
CitationColosio, M. and de Andrade, A., "Fatigue Life of Normalized and Quenching & Tempered Stabilizer Bars," SAE Technical Paper 2004-01-3256, 2004, https://doi.org/10.4271/2004-01-3256.
- AMERICAN SOCIETY FOR TESTING & MATERIALS - ASTM Standard practice for presentation of constant amplitude fatigue results for metallic ASTM E468-90 1 6 June 1990
- SOCIETY OF AUTOMOTIVE ENGINEERS - SAE Manual on design and manufacture of torsion bar springs SAE HS-796 1 53 1991
- SOCIETY OF AUTOMOTIVE ENGINEERS - SAE Fatigue Design and Evaluation Committee Fatigue Design Handbook 1997
- McEVILY, A. J. MINAKAWA, K. On the effect of microstructure on crack closure in the near-threshold region 1385 1392 1987
- SHENGPING, W. LI, Y. YAO, M. WANG, R. Fatigue limits of shot-peened metals Journal of Materials Processing Technology 73 57 63 1998
- AMERICAN SOCIETY FOR TESTING & MATERIALS - ASTM Standard test method for measurement of fatigue crack growth rates ASTM E647-00 1 42 2000
- GENERAL MOTORS ENGINEERING STANDARDS Durability test of stabilizers in an axle system 1 4 Sep 1995
- FATEMI, A. YANG, L. Cumulative fatigue damage and life prediction theories: A survey of the state of the art for homogeneous materials International Journal of Fatigue 20 1 9 34 1998
- ANDERSON, T. L. Fracture Mechanics: Fundamentals and applications 2 CRC Press 1995
- JAMES, L. A. MILLS, W. J. Review and synthesis of stress intensity factor solutions applicable to cracks in bolts Engineering Fracture Mechanics 30 5 641 654 1988
- MILLER, K. J. The behaviour of short fatigue cracks and their initiation. Part I- A review of two recent books Fatigue Fracture Engineering Materials Structures 10 1 75 91 1987
- MURAKAMI, Y. ENDO, M. Quantitative evaluation of fatigue strength of metals containing various small defects or cracks Engineering Fracture Mechanics 17 1 1 5 1983