Dynamic strain ageing of deformed nitrogen-alloyed AISI 316 stainless steels

Ehrnstén, Ulla; Ivanchenko, Mykola; Nevdacha, Vitaly; Yagodzinskyy, Yuriy; Toivonen, Aki; Hänninen, Hannu

doi:10.1533/9781845693466.2.103

Cited by 5 publications

(4 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Typically, an N atom is located in the vicinity of six Cr atoms [ 21 ]. Karlsen et al and Ehrnstén et al could only detect DSA in AISI 316 L steel at temperatures of 288 °C and 400 °C, respectively, well above RT [ 21 , 22 ].…”

Section: Introductionmentioning

confidence: 99%

Influence of C and N on Strain-Induced Martensite Formation in Fe-15Cr-7Mn-4Ni-0.5Si Austenitic Steel

et al. 2021

View full text Add to dashboard Cite

In this study, the effect of interstitial contents on the mechanical properties and strain-induced martensite formation in an austenitic stainless steel was investigated. The mechanical properties of solution annealed Fe-15Cr-7Mn-4Ni-0.5Si-(0.01-0.2)N-(0.01-0.2)C concentrations in weight percent stainless steels were studied using room temperature tensile tests. All three alloys used in the present study have a sum content of C + N of about 0.2 wt.%. To verify the influence of C and N on deformation behavior, microstructural investigations are performed using light optical microscopy, scanning electron microscopy, and magnetic and hardness measurements. Moreover, strain-induced α′-martensite nucleation was characterized by scanning electron microscope using EBSD. In the present alloy system, carbon provides a stronger austenite stabilizing effect than nitrogen. Hence, the smallest amount of strain-induced α′-martensite was formed in the steel alloyed with 0.2 wt.% C. It also exhibited the optimal mechanical properties, including the highest ultimate tensile strength (1114 MPa), uniform elongation (63%), and total elongation (68%). Moreover, the interstitial content influences the occurrence of dynamic strain aging (DSA), which was only observed in the steel alloyed with carbon. With increasing C content, the triggering strain for DSA decreases, which can be confirmed by in situ magnetic measurements during tensile testing.

show abstract

Section: Introductionmentioning

confidence: 99%

Influence of C and N on Strain-Induced Martensite Formation in Fe-15Cr-7Mn-4Ni-0.5Si Austenitic Steel

et al. 2021

View full text Add to dashboard Cite

show abstract

“…: in some cases, the material exhibits increase in stress level (in strain controlled experiments) after several cycles -strain hardening. The cyclic hardening and softening greatly affects material fatigue behavior [4].…”

Section: Methodsmentioning

confidence: 99%

Parameters influencing the low-cycle fatigue life of materials in pressure water reactor nuclear power plants / Parametry ovlivòující únavové chování materiálù pro tlakovodní jaderné reaktory v režimu nízkocyklové únavy

Šefl

2015

Koroze a Ochrana Materialu

View full text Add to dashboard Cite

In this literature review we identify and quantify the parameters influencing the low-cycle fatigue life of materials commonly used in nuclear power plants. The parameters are divided into several groups and individually described. The main groups are material properties, mode of cycling and environment parameters. The groups are further divided by the material type - some parameters influence only certain kind of material, e.g. sulfur content may decreases fatigue life of carbon steel, but is not relevant for austenitic stainless steel; austenitic stainless steel is more sensitive to concentration of dissolved oxygen in the environment compared to the carbon steel. The combination of parameters i.e. conjoint action of several detrimental parameters is discussed. It is also noted that for certain parameters to decrease fatigue life, it is necessary for other parameter to reach certain threshold value. Two different approaches have been suggested in literature to describe this complex problem - the Fen factor and development of new design fatigue curves. The threshold values and examples of commonly used relationships for calculation of fatigue lives are included. This work is valuable because it provides the reader with long-term literature review with focus on real effect of environmental parameters on fatigue life of nuclear power plant materials.

show abstract

“…The results of a broader study mapping the DSA behaviour of AISI 316 stainless steels having several different nitrogen contents, over a range of strain rates, temperatures and levels of prior cold work, have been reported in [10]. The goal of the current study was to examine the deformation microstructures and internal friction response of a sub-set of those test materials, in order to determine any observable differences in the resulting dislocation structures and internal friction response of materials showing and not showing DSA behaviour, to enable the interstitial atom behaviour to be linked with the deformation behaviour.…”

Section: Introductionmentioning

confidence: 99%

“…The stress-strain curves of AISI 316 NG steel tested at 10 À5 s À1 showing serrated behaviour at 288 and 400°C, but not at 200°C, from[10]. Internal friction vs. temperature of AISI 316 NG steel after pre-straining (20%) at different temperatures.…”

mentioning

confidence: 99%

Microstructural manifestation of dynamic strain aging in AISI 316 stainless steel

Karlsen

Ivanchenko

Ehrnstén

et al. 2009

Journal of Nuclear Materials

View full text Add to dashboard Cite

Dynamic strain ageing of deformed nitrogen-alloyed AISI 316 stainless steels

Cited by 5 publications

References 7 publications

Influence of C and N on Strain-Induced Martensite Formation in Fe-15Cr-7Mn-4Ni-0.5Si Austenitic Steel

Influence of C and N on Strain-Induced Martensite Formation in Fe-15Cr-7Mn-4Ni-0.5Si Austenitic Steel

Parameters influencing the low-cycle fatigue life of materials in pressure water reactor nuclear power plants / Parametry ovlivòující únavové chování materiálù pro tlakovodní jaderné reaktory v režimu nízkocyklové únavy

Microstructural manifestation of dynamic strain aging in AISI 316 stainless steel

Contact Info

Product

Resources

About