Microstructural manifestation of dynamic strain aging in AISI 316 stainless steel

Wade Karlsen (Corresponding Author), M. Ivanchenko, Ulla Ehrnstén, Y. Yagodzinskyy, Hannu Hänninen

Research output: Contribution to journalArticleScientificpeer-review

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Abstract

Dynamic strain aging (DSA) affects a material’s mechanical behaviour. In the current study, the deformation microstructures of AISI 316 stainless steel specimens were examined after tensile testing at several temperatures both in and out of the DSA-regime (200, 288 and 400 °C), and the effect of straining on free nitrogen evolution at those temperatures was studied by Anelastic Mechanical Loss Spectrometry (Internal Friction). Analysis of the nitrogen-induced Snoek-like peak after straining indicated that DSA behaviour is associated with the formation of sub-micron scale, nitrogen-enriched zones in the austenitic matrix. Long-range planarity was observed in the dislocation structures at 400 °C and short-range planarity at 288 °C, but at 200 °C the microstructure exhibited cellular dislocation structure. Diffusion re-distribution of nitrogen in the DSA-regime affected the deformation behaviour of the material by restricting cross-slip, which in turn promotes strain localization, degrading the mechanical performance of the material.
Original languageEnglish
Pages (from-to)156-161
Number of pages6
JournalJournal of Nuclear Materials
Volume395
Issue number1-3
DOIs
Publication statusPublished - 2009
MoE publication typeA1 Journal article-refereed

Fingerprint

precipitation hardening
Stainless Steel
stainless steels
Stainless steel
Aging of materials
nitrogen
Nitrogen
microstructure
internal friction
Microstructure
Internal friction
Tensile testing
slip
Spectrometry
temperature
matrices
Temperature
spectroscopy

Cite this

Karlsen, Wade ; Ivanchenko, M. ; Ehrnstén, Ulla ; Yagodzinskyy, Y. ; Hänninen, Hannu. / Microstructural manifestation of dynamic strain aging in AISI 316 stainless steel. In: Journal of Nuclear Materials. 2009 ; Vol. 395, No. 1-3. pp. 156-161.
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abstract = "Dynamic strain aging (DSA) affects a material’s mechanical behaviour. In the current study, the deformation microstructures of AISI 316 stainless steel specimens were examined after tensile testing at several temperatures both in and out of the DSA-regime (200, 288 and 400 °C), and the effect of straining on free nitrogen evolution at those temperatures was studied by Anelastic Mechanical Loss Spectrometry (Internal Friction). Analysis of the nitrogen-induced Snoek-like peak after straining indicated that DSA behaviour is associated with the formation of sub-micron scale, nitrogen-enriched zones in the austenitic matrix. Long-range planarity was observed in the dislocation structures at 400 °C and short-range planarity at 288 °C, but at 200 °C the microstructure exhibited cellular dislocation structure. Diffusion re-distribution of nitrogen in the DSA-regime affected the deformation behaviour of the material by restricting cross-slip, which in turn promotes strain localization, degrading the mechanical performance of the material.",
author = "Wade Karlsen and M. Ivanchenko and Ulla Ehrnst{\'e}n and Y. Yagodzinskyy and Hannu H{\"a}nninen",
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Microstructural manifestation of dynamic strain aging in AISI 316 stainless steel. / Karlsen, Wade (Corresponding Author); Ivanchenko, M.; Ehrnstén, Ulla; Yagodzinskyy, Y.; Hänninen, Hannu.

In: Journal of Nuclear Materials, Vol. 395, No. 1-3, 2009, p. 156-161.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Microstructural manifestation of dynamic strain aging in AISI 316 stainless steel

AU - Karlsen, Wade

AU - Ivanchenko, M.

AU - Ehrnstén, Ulla

AU - Yagodzinskyy, Y.

AU - Hänninen, Hannu

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AB - Dynamic strain aging (DSA) affects a material’s mechanical behaviour. In the current study, the deformation microstructures of AISI 316 stainless steel specimens were examined after tensile testing at several temperatures both in and out of the DSA-regime (200, 288 and 400 °C), and the effect of straining on free nitrogen evolution at those temperatures was studied by Anelastic Mechanical Loss Spectrometry (Internal Friction). Analysis of the nitrogen-induced Snoek-like peak after straining indicated that DSA behaviour is associated with the formation of sub-micron scale, nitrogen-enriched zones in the austenitic matrix. Long-range planarity was observed in the dislocation structures at 400 °C and short-range planarity at 288 °C, but at 200 °C the microstructure exhibited cellular dislocation structure. Diffusion re-distribution of nitrogen in the DSA-regime affected the deformation behaviour of the material by restricting cross-slip, which in turn promotes strain localization, degrading the mechanical performance of the material.

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JO - Journal of Nuclear Materials

JF - Journal of Nuclear Materials

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