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Effect of temperatu...
Effect of temperature on the stacking fault energy and deformation behaviour in 316L austenitic stainless steel
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- Molnár, Dávid Sándor (author)
- KTH,Tillämpad materialfysik,Högskolan Dalarna,Materialteknik,Royal Inst Technol, Dept Mat Sci & Engn, Appl Mat Phys, SE-10044 Stockholm, Sweden;Dalarna Univ, Mat Sci Grp, SE-79188 Falun, Sweden
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- Sun, Xun (author)
- KTH,Tillämpad materialfysik,Royal Inst Technol, Dept Mat Sci & Engn, Appl Mat Phys, SE-10044 Stockholm, Sweden;Xi An Jiao Tong Univ, State Key Lab Mech Behav Mat, Frontier Inst Sci & Technol, Ctr Microstruct Sci, Xian 710049, Shaanxi, Peoples R China
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- Lu, Song (author)
- KTH,Tillämpad materialfysik,Royal Inst Technol, Dept Mat Sci & Engn, Appl Mat Phys, SE-10044 Stockholm, Sweden
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- Li, Wei (author)
- KTH,Tillämpad materialfysik,Royal Inst Technol, Dept Mat Sci & Engn, Appl Mat Phys, SE-10044 Stockholm, Sweden
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- Engberg, Göran (author)
- Högskolan Dalarna,Materialteknik,Dalarna Univ, Mat Sci Grp, SE-79188 Falun, Sweden
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- Vitos, Levente (author)
- Uppsala universitet,KTH,Tillämpad materialfysik,Materialteori,Royal Inst Technol, Dept Mat Sci & Engn, Appl Mat Phys, SE-10044 Stockholm, Sweden;Wigner Res Ctr Phys, Inst Solid State Phys & Opt, H-1525 Budapest, Hungary
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(creator_code:org_t)
- Elsevier, 2019
- 2019
- English.
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In: Materials Science & Engineering. - : Elsevier. - 0921-5093 .- 1873-4936. ; 759, s. 490-497
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Abstract
Subject headings
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- The stacking fault energy (SFE) is often used as a key parameter to predict and describe the mechanical behaviour of face centered cubic material. The SFE determines the width of the partial dislocation ribbon, and shows strong correlation with the leading plastic deformation modes. Based on the SFE, one can estimate the critical twinning stress of the system as well. The SFE mainly depends on the composition of the system, but temperature can also play an important role. In this work, using first principles calculations, electron backscatter diffraction and tensile tests, we show a correlation between the temperature dependent critical twinning stress and the developing microstructure in a typical austenitic stainless steel (316L) during plastic deformation. We also show that the deformation twins contribute to the strain hardening rate and gradually disappear with increasing temperature. We conclude that, for a given grain size there is a critical temperature above which the critical twinning stress cannot be reached by normal tensile deformation, and the disappearance of the deformation twinning leads to lower strain hardening rate and decreased ductility.
Subject headings
- TEKNIK OCH TEKNOLOGIER -- Materialteknik -- Metallurgi och metalliska material (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Materials Engineering -- Metallurgy and Metallic Materials (hsv//eng)
Keyword
- Deformation twinning
- microstructure
- first principles
- stacking fault energy
- stainless steel
- Teknisk materialvetenskap
- Materials Science and Engineering
- Steel Forming and Surface Engineering
Publication and Content Type
- ref (subject category)
- art (subject category)
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