This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Effects of Graphite Morphology, Matrix Hardness, and Structure on the Fatigue Resistance of Gray Cast Iron
Annotation ability available
Sector:
Language:
English
Abstract
The fatigue resistance of gray cast iron is shown to be strongly dependent on graphite morphology and the strength of the steel-like matrix. Considering graphite flakes in gray iron as internal notches, a comparison is made of the fatigue resistance of gray irons and steels of comparable composition, hardness, and microstructure. Application of a Neuber analysis, previously employed in geometrically notched members to relate nominal stresses and strains to local stresses and strains at notch roots, produces quantitative values of the fatigue notch factor, Kf, for various graphite morphologies, matrix structures, and hardnesses. Fatigue resistance of gray irons is enhanced by decreasing graphite flake size. Matrix hardness is of greater importance than structure in determining the fatigue resistance.
Recommended Content
Technical Paper | Study on Spark Plug Carbon Fouling |
Technical Paper | Design Allowable Factors in Composite Materials |
Technical Paper | The Scuffing Resistance of the Nitrocarburized and Carburized Steel |
Authors
Citation
Mitchell, M., "Effects of Graphite Morphology, Matrix Hardness, and Structure on the Fatigue Resistance of Gray Cast Iron," SAE Technical Paper 750198, 1975, https://doi.org/10.4271/750198.Also In
References
- SAE Fatigue Design Handbook 4 Society of Automotive Engineers New York, New York 1968
- Mitchell M. R. “Cyclic Deformation and Fracture Behavior of Gray Cast Iron.” M. S. thesis Wayne State University Detroit 1969
- Dieter G. E. “Mechanical Metallurgy.” New York McGraw-Hill 242
- Landgraf R. W. Morrow JoDean Endo T. “Determination of the Cyclic Stress-Strain Curve.” ASTM Journal of Materials, JMLSA 4 1 March 1969 176 199
- Landgraf R. W. “The Resistance of Metals to Cyclic Deformation.” Achievement of High Fatigue Resistance in Metals and Alloys American Society of Testing and Materials 1970 3 36
- Feltner C. E. Mitchell M. R. “Basic Research on the Cyclic Deformation and Fracture Behavior of Materials.” Manual on Low Cyclic Fatigue Testing American Society for Testing and Materials 1969 27 66
- Kuhn P. Hardrath H. F. “An Engineering Method for Estimating Notch-Size Effect in Fatigue Tests on Steel.” NACA, Tech. Note 2805 October 1952
- Topper T. H. Wetzel R. M. Morrow JoDean “Neuber's Rule Applied to Fatigue of Notched Specimens.” ASTM Journal of Materials, JMLSA 4 1 March 1969 200 209
- Wetzel R. M. Morrow JoDean Topper T. H. “Fatigue of Notched Parts with Emphasis on Local Stresses and Strains.” Naval Air Development Center Report No. NADC-ST-6818 September 1968
- Sinclair G. M. Dolan T. J. “Some Effects of Austenitic Grain Size and Metallurgical Structure on the Mechanical Properties of Steel.” ASTM Proc. 50 1950 587 618
- Ikawa K. Ohira G. “Fatigue Properties of Cast Iron in Relation to Graphite Structure.” AFS Cast Metals Research Journal 3 1 March 1967 11 21
- Peterson R. E. “Stress Concentration Design Factors.” New York Wiley & Sons, Inc. 1953 88 “Stress Concentration Factors.” New York Wiley & Sons, Inc. 1974 195