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Deformation behaviour of a prestrained duplex stainless steel
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- Moverare, Johan, 1973- (author)
- Linköpings universitet,Konstruktionsmaterial,Tekniska högskolan
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- Odén, Magnus, 1965- (author)
- Linköpings universitet,Konstruktionsmaterial,Tekniska högskolan
- (creator_code:org_t)
- 2002
- 2002
- English.
- In: Materials Science & Engineering. - 0921-5093 .- 1873-4936. ; 337:1-2, s. 25-38
- Journal article (peer-reviewed)
Abstract
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- The anisotropic flow behaviour due to a change in strain path during uniaxial deformation of a duplex stainless steel has been investigated. The anisotropic flow behaviour of the as-received material could be predicted from the crystallographic texture. However, it was found that prestraining introduces a transient work hardening behaviour during the second stage deformation, which causes an anisotropic flow behaviour immediately after yielding that cannot be described by the crystallographic texture. Samples subjected to a coaxial second stage deformation show a small increase in flow stress and similar work hardening rate as in the monotonic loading. Samples subjected to noncoaxial second stage deformation show a pronounced transient stage characterised by early yielding and a high work hardening rate in the first part of the transient stage. Beyond the earliest stage of deformation a higher flow stress and a lower work hardening rate compared to monotonic loading is observed for the noncoaxial samples. The transient phenomena are discussed based on the measured internal stresses and the differences in dislocation structures in the two different phases.
Keyword
- TECHNOLOGY
- TEKNIKVETENSKAP
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- ref (subject category)
- art (subject category)
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