This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Deep Rolling Response of Notched Medium Carbon Bar Steels
Technical Paper
2004-01-1528
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
The effects of deep rolling were evaluated by reviewing the fatigue performance of three medium-carbon (0.4 C) bar steels representing microstructural classes characteristic of forging steels used for crankshaft and other automotive applications. Deep rolling is a surface deformation process whereby a radially symmetric work piece undergoes a surface deformation operation. The steel grades included a quenched and tempered alloy steel (4140) that demonstrated a high yield stress and low strain hardening rate, a non-traditional bainitic experimental grade (1.2 Mn, 0.72 Si) containing high amounts of retained austenite with low yield stress and high strain hardening rate, and a ferritic/pearlitic grade (1.3 Mn, 0.56 Si) with a low yield stress and medium strain rate hardening rate.
A reproducible test methodology to assess fatigue behavior was developed, based on flex-beam, fully reversed, S-N type laboratory fatigue testing. The as-received fatigue behavior of the three steels was characterized to provide a basis for comparison with the deep rolled condition. The deep rolling process was optimized in terms of rolling load based on peak fatigue life at an imposed nominal stress level for each steel. These conditions were used to process fatigue specimens for the final deep rolled condition. From the deep rolled specimens, the hardness profile and fatigue behavior were characterized. The fatigue data, fracture characteristics, and hardness profile data, are interpreted based on the consideration of the microstructure and corresponding strain hardening behavior as measured in compression and tensile tests.
Recommended Content
Authors
Citation
Richards, M., Matlock, D., and Speer, J., "Deep Rolling Response of Notched Medium Carbon Bar Steels," SAE Technical Paper 2004-01-1528, 2004, https://doi.org/10.4271/2004-01-1528.Also In
Innovations in Steel Sheet and Bar Products and Processing, and Modelling and Testing of Steel Structures
Number: SP-1837; Published: 2004-03-08
Number: SP-1837; Published: 2004-03-08
References
- Randlett E. “Deep Rolling of Crankshaft,” SME
- Naumann H. “Deep Rolling of Highly Stressed Components,” American Society of Tool and Manufacturing Engineers 1968
- Watmough T. Malatesta M.J. “Strengthening of Ductile Iron of Crankshaft Applications,” American Foundrymen's Society, Inc. 1984 83 99
- Gilbert G.N.J. Palmer K.B. “The influence of surface rolling on the fatigue properties of flake graphite and nodular graphite cast irons,” British Cast Iron Research Institute Journal of Research and Development 5 392 1954 447 464
- Kloos K. H. Adelmann J. “Effect of Deep Rolling on Fatigue Properties of Cast Irons,” Journal of the Mechanical Behavior of Materials (UK) 2 1-2 1989 75 86
- Kloos K.H. Fuchsbauer B. Adelmann J. “Fatigue properties of specimens similar to components deep rolled under optimized conditions,” International Journal of Fatigue 9 1 1987 35 42
- Kloos K.H. Broszeit E. Fuchsbauer B. Schmidt F. “Optimierung von Schingfestigkeitseigenschaften beim Oberflachendrücken gekerbter Umlaufbiegeproben unter Berücksichtigung der ProbengröBe*,” Z. Werkstofftech. 12 1981 359 365
- Chatterley T.C. Murrell P. “ADI Crankshaft - An Appraisal of Their Production Potential,” Society of Automotive Engineers, Inc., 980686 1998 436 453
- Park H. Ko Y.S. Jung S.C. “Fatigue life analysis of crankshafts at various surface treatments,” Society of Automotive Engineers, Inc., 01ATT193 2001
- Matlock D.K. Zia-Ebrahimi F. Krauss G. “Structure, Properties, and Strain Hardening of Dual-Phase Steels,” Deformation, Processing, and Structure ASM 1982 47 87
- Fuchs H.O. Stephens R.I. “Metal Fatigue in Engineering,” John Wiley & Sons 1980 68 69
- Richards M.D. Matlock D.K. Speer J.G. De A.K. Colorado School of Mines Golden, Colorado 2004