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Article: Gigacycle Fatigue Properties of a Modified-Ausformed Si-Mn Steel and Effects of Microstructure
- Article from:
- Metallurgical and Materials Transactions
- Article date:
- June 1, 2004
- Author:
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Copyright informationCopyright Minerals, Metals & Materials Society Jun 2004. Provided by ProQuest LLC. (Hide copyright information)
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Fatigue tests were conducted for modified-ausformed, oil-quenched, and water-quenched versions of a Si-Mn steel (JIS-SMn443) with a chemical composition of 0.42C-0.2Si-1.52Mn (in mass pct). The Si-Mn Steel has an advantage with respect to recycling, since it contains no Cr or Mo, although the steel has disadvantages with respect to tempering resistance and hardenablility. Although the tempering resistance was not improved by modified ausforming, the problem of hardenability was minimized, since modified ausforming created fine and uniform martensite. The gigacycle fatigue properties of the Si-Mn steel were improved by the modified ausforming. The low-strength modified-ausformed steel ...