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Article: Room-Temperature Aging of Manganese-Alloyed High Nitrogen Duplex Stainless Steels
- Article from:
- Metallurgical and Materials Transactions
- Article date:
- July 1, 2006
- Author:
CopyrightCopyright Minerals, Metals & Materials Society Jul 2006. Provided by ProQuest LLC. (Hide copyright information)
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The room-temperature aging behavior of two duplex stainless alloys with different austenite stability was investigated. Both alloys readily aged at room temperature. Even for aging times as short as 30 seconds, the originally continuous yielding behavior becomes discontinuous upon reloading after prestraining. The magnitude of the stress increase due to aging was higher in the presence of straininduced martensite, even though it was shown that aging also occurred in the austenite phase. The aging response was shown to be thermally activated, with increasing age hardening associated with increasing aging times. The results could be explained by the combination of aging phenomena in the bcc ...