Effect of retained austenite on short fatigue cracks in austempered ductile cast iron (ADI)
The fatigue resistance in ductile irons generally increases with tensile strength and matrix hardness as the matrix microstructure varies from ferrite through ferrite/pearlite and ausferrite to quenched and tempered martensite. However, there is a maximum in the fatigue limit in austempered ductile...
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