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- Hossain, S.Dept of Mech Eng University of Bristol, UK (author)
A study of the generation and creep relaxation of triaxial residual stresses in stainless steel
- Article/chapterEnglish2007
Publisher, publication year, extent ...
- Elsevier BV,2007
- printrdacarrier
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- LIBRIS-ID:oai:DiVA.org:uu-145172
- https://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-145172URI
- https://doi.org/10.1016/j.ijsolstr.2006.09.001DOI
- https://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-37784URI
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- Language:English
- Summary in:English
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Notes
- This paper presents results from a numerical and experimental research programme motivated by the need to predict creep damage generated by multi-axial states of stress in austenitic stainless steels. It has been hypothesized that highly triaxial residual stress fields may be sufficient to promote creep damage in thermally aged components, even in the absence of in-service loads. Two prerequisites to test this hypothesis are the provision of test specimens containing a highly triaxial residual stress field and an accurate knowledge of how this residual stress field relaxes due to creep. Creep damage predictions may then be made for these specimens and compared to damage observed in experiments. This paper provides solutions to both of these prerequisites. Cylindrical and spherical test specimens made from type 316H stainless steel are heated to 850 degrees C and then quenched in water. Finite element predictions of the residual stress state, validated by extensive neutron diffraction measurements, are presented which confirm the high level of triaxiality present in the specimens. The specimens are then thermally aged at 550 degrees C and numerical predictions of the residual stress relaxation are given, again validated by extensive neutron diffraction measurements. The results confirm the validity of the creep relaxation models employed. In addition, the results show the influence of specimen size and permit comparisons to be made between three different types of neutron diffractometers.
Subject headings and genre
- creep relaxation
- residual stress
- neutron diffraction
- TECHNOLOGY
- TEKNIKVETENSKAP
Added entries (persons, corporate bodies, meetings, titles ...)
- Truman, C. E.Dept of Mech Eng University of Bristol. UK (author)
- Smith, D. J.Dept of Mech Eng University of Bristol, UK (author)
- Peng, Ru,1960-Uppsala universitet,Neutronforskningslaboratoriet i Studsvik,Uppsala University(Swepub:liu)rupe37 (author)
- Stuhr, U.Laboratory for Neutron Scattering ETH Zürich and Paul Scherrer Institute, Villigen, Switzerland (author)
- Dept of Mech Eng University of Bristol, UKDept of Mech Eng University of Bristol. UK (creator_code:org_t)
Related titles
- In:International Journal of Solids and Structures: Elsevier BV44:9, s. 3004-30200020-76831879-2146
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