Fatigue Crack Growth Behavior of 316LN Stainless Steel with Different Nitrogen Contents

Babu, M. Nani; Dutt, B. Shashank; Venugopal, S.; Sasikala, G.; Albert, Shaju K.; Bhaduri, A.K.; Jayakumar, T.

doi:10.1016/j.proeng.2013.03.320

Cited by 14 publications

(5 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In terms of mechanical properties, the steady state creep rate decreased significantly with increasing nitrogen content [5,6], and a similar phenomenon was also found in impression creep tests [7,8]. When the N content was no more than 0.14%, 316LN stainless steel with higher N content showed better crack growth resistance at ambient [9] and high temperature [10]. In terms of microstructure evolution, the temperature of the onset of dynamic strain aging in 316LN steel with 0.22%N is 773 K, while that in 316LN with 0.078%N is found to be 673 K [11].…”

Section: Introductionsupporting

confidence: 69%

“…It can be inferred that N content could affect the hot working behavior of 316LN stainless steel. The deformation parameter in [12,13] is single and the effect of N content on 2 Advances in Materials Science and Engineering these properties may not be monotonic, as observed in the investigation of creep [6] and fatigue properties [9] of 316LN stainless steel with notch specimens.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Effect of Nitrogen Content on Hot Deformation Behavior and Grain Growth in Nuclear Grade 316LN Stainless Steel

Guo

Wang

Zhou

et al. 2015

Advances in Materials Science and Engineering

View full text Add to dashboard Cite

316LN stainless steel with 0.08%N (08N) and 0.17%N (17N) was compressed at 1073–1473 K and 0.001–10 s−1. The hot deformation behavior was investigated using stress-strain curve analysis, processing maps, and so forth. The microstructure was analyzed through electron backscatter diffraction analysis. Under most conditions, the deformation resistance of 17N was higher than that of 08N. This difference became more pronounced at lower temperatures. The strain rate sensitivity increased with increasing temperature for types of steel. In addition, the higher the N content, the higher the strain rate sensitivity. Hot deformation activation energy increased from 487 kJ/mol to 549 kJ/mol as N concentration was increased from 0.08% to 0.17%. The critical strain for initiation of dynamic recrystallization was lowered with increasing N content. In the processing maps, both power dissipation ratio and unstable region increased with increasing N concentration. In terms of microstructure evolution, N promoted dynamic recrystallization kinetic and decreased dynamic recrystallization grain size. The grain growth rate was lower in 17N than in 08N during heat treatment. Finally, it was found that N favored twin boundary formation.

show abstract

Section: Introductionsupporting

confidence: 69%

Section: Introductionmentioning

confidence: 99%

Effect of Nitrogen Content on Hot Deformation Behavior and Grain Growth in Nuclear Grade 316LN Stainless Steel

Guo

Wang

Zhou

et al. 2015

Advances in Materials Science and Engineering

View full text Add to dashboard Cite

show abstract

“…40 Deformation by planar slip could improve fatigue resistance, because dislocations moving on a single plane can glide in the opposite directions upon load reversal with minimal damage accumulation. 41 This planar slip creates hills and valleys called as roughness which determines the extent of irreversibility of slip as shown in Fig. 4.…”

Section: Resultsmentioning

confidence: 99%

Characterisation of microstructural damage due to corrosion fatigue in AISI type 316 LN stainless steels with different nitrogen contents

Poonguzhali

Pujar

Mallika

et al. 2016

Corrosion Engineering, Science and Technology

View full text Add to dashboard Cite

Corrosion fatigue (CF) behaviour of AISI type 316 LN stainless steels (SS) with three different nitrogen contents was evaluated in a boiling aqueous solution of 5 M NaCl+0•15 M Na 2 SO 4 +2•5 ml l −1 HCl at a stress ratio of 0•5 and a frequency of 0•1 Hz. After the CF tests, the specimens were observed under a field emission gun scanning electron microscope (FEG-SEM) as well as an atomic force microscope (AFM) to understand the deformation mechanism which led to the failure. Slip character could be explained based on the surface deformation features observed using FEG-SEM and AFM. A slip irreversibility relation has been proposed which when applied could explain the CF behaviour of these steels with varying nitrogen contents. Increase in the nitrogen content increased the slip reversibility up to 0•14 wt-% nitrogen; however, further increase in nitrogen content had no beneficial effect on the slip reversibility.

show abstract

“…During FCG, planar slip leads to the generation of hills and valleys on the fracture surface leading to roughness which is decided by the extent of irreversibility of slip. Therefore, From the fracture surface roughness parameters, average surface roughness height (h) and wave length (λ), cumulative slip offset (w) have been estimated and used for quantifying the fraction of slip irreversibility [6]. The estimated slip irreversibility fractions are presented in Table 3, for different nitrogen levels.…”

Section: Advanced Materials Research Vol 794mentioning

confidence: 99%

Characterisation of Fatigue Crack Growth and Fracture Behaviour of SS 316L(N) Base and Weld Materials

Sasikala

Babu

Dutt

et al. 2013

AMR

View full text Add to dashboard Cite

This paper summarizes the results of the studies on fracture mechanics characterisation of SS 316L(N) and its welds. The results presented include the fracture toughness and FCG properties of the base and weld materials at different temperatures. Influence of nitrogen content on the base material properties is discussed. Further, the effects of long-term ageing at different temperatures on the fracture and FCG behaviour of the welds are presented and discussed. The weld metal has been subjected to extended thermal ageing, and a detailed study has been undertaken to characterize the (i) FCG properties and (ii) quasistaticJ-R curves for the indigenously developed SS 316(N) weld material at both ambient and service temperatures. The ageing conditions covered include the advanced ageing according to the RCC-MR design code, i.e, > 4000 h at 923 K and the low temperature ageing, i.e., 643-823 K the operating range for the SS 316L(N) components in PFBR. The results are discussed in detail in the light of microstructural changes taking place in the weld metal and their influence on the operating micromechanisms.

show abstract

Fatigue Crack Growth Behavior of 316LN Stainless Steel with Different Nitrogen Contents

Cited by 14 publications

References 14 publications

Effect of Nitrogen Content on Hot Deformation Behavior and Grain Growth in Nuclear Grade 316LN Stainless Steel

Effect of Nitrogen Content on Hot Deformation Behavior and Grain Growth in Nuclear Grade 316LN Stainless Steel

Characterisation of microstructural damage due to corrosion fatigue in AISI type 316 LN stainless steels with different nitrogen contents

Characterisation of Fatigue Crack Growth and Fracture Behaviour of SS 316L(N) Base and Weld Materials

Contact Info

Product

Resources

About