Crack tip transformation zones in austenitic stainless steel
Författare
Summary, in English
Crack tip conditions in SUS 304 austenitic stainless steel are studied using a constitutive model in which the martensitic phase transformation is an integral part. The phase transformation occurring in the crack tip region gives rise to fracture toughening of the material whereby the resistance against crack initiation, as well as the macroscopic material response are strongly altered by the presence of a martensitic phase. The constitutive model employed herein permits studying the transformation zones under different isothermal conditions. Local crack tip conditions and related plastic deformation is confirmed to depend strongly on the varying extent of the martensitic phase transformation at different temperatures. The shape and size of the plastic and transformation zones in the neighborhood of the crack tip are obtained from numerical simulations, as well as derived analytically.
Avdelning/ar
Publiceringsår
2012
Språk
Engelska
Sidor
266-280
Publikation/Tidskrift/Serie
Engineering Fracture Mechanics
Volym
79
Fulltext
- Available as PDF - 356 kB
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Länkar
Dokumenttyp
Artikel i tidskrift
Förlag
Elsevier
Ämne
- Mechanical Engineering
Nyckelord
- Steels
- Constitutive modeling
- Phase transformation
- 304 Stainless steel
- Transformation toughening
Status
Published
ISBN/ISSN/Övrigt
- ISSN: 1873-7315