Fatigue life of stainless steel 304 enhancement by addition of multi-walled carbon nanotubes (MWCNTs)

Syed, Rizwanulhaque; Jiang, Wei; Wang, Cunshan; Sabir, Muhammad Iqbal

doi:10.1007/s12206-014-1235-7

Cited by 15 publications

(5 citation statements)

References 20 publications

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“…These studies also include the relationship between the welding processes and its influence on the phases formed with the mechanisms of strength as well as its responses to the corrosion susceptibility and anomalies that can promote equipment failure without notice during operation [8] [9].…”

Section: Introductionmentioning

confidence: 99%

Influence of MIG/MAG Welding Process on Mechanical and Pitting Corrosion Behaviors on the Super-Duplex Stainless Steel SAF 2507 Welded Joints

Lopes¹,

Rodrigues²,

Silva³

et al. 2018

MSA

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The main objective of this research is to better understand the correlation between the constituent phases presented in the super-duplex steel SAF 2507 when it is under welding process by arc shielding gas MIG-MAG (Metal Inert Gas-Metal Active Gas). Conventional short circuit transfer and derivative STT (Surface Tension Transfer) using the 2594 welding wire as a filler metal and the effects on welding power in hardness, toughness and pitting corrosion are considered here. The results showed that the welding energy (Ew) changed the α/γ-phase's balance and occasionally formed σ-phase in ferrite grain boundaries which led to changes in hardness, toughness and pitting corrosion resistance in molten zone (MZ), heat activated zone (HAZ) and metal base regions (MB). Furthermore, the increased amount of γ-phase improved the pitting corrosion resistance index (PRENγ) mainly in the MZ. This is due to decrease of α-phase fraction and formation of coarser grains, for higher welding energy. The toughness in the MZ decreased with less formation of γ-phase, coalescence of ferritic grains and localized formation of σ-phase, raising the hardness in the HAZ when the welding energy was lower.

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Section: Introductionmentioning

confidence: 99%

Influence of MIG/MAG Welding Process on Mechanical and Pitting Corrosion Behaviors on the Super-Duplex Stainless Steel SAF 2507 Welded Joints

Lopes¹,

Rodrigues²,

Silva³

et al. 2018

MSA

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show abstract

“…This paper will take 304SS as the research object and the mechanical properties of this material are shown in Tab. 1 [Syed, Jiang, Wang et al (2015)]. The cyclic stress-strain curve of 304SS is shown in Fig.…”

Section: Modeling Framework 21 Materials and Determination Of Criticamentioning

confidence: 99%

Numerical Simulation and Experimental Studies on Elastic-Plastic Fatigue Crack Growth

Wang¹,

Jiang²,

Wang³

2019

Computer Modeling in Engineering &Amp; Sciences

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A elastic-plastic fatigue crack growth (FCG) finite element model was developed for predicting crack growth rate under cyclic load. The propagation criterion for this model was established based on plastically dissipated energy. The crack growth simulation under cyclic computation was implemented through the ABAQUS scripting interface. The predictions of this model are in good agreement with the results of crack propagation experiment of compact tension specimen made of 304 stainless steel. Based on the proposed model, the single peak overload retardation effect of elastic-plastic fatigue crack was analyzed. The results shows that the single peak overload will reduce the accumulation rate of plastic energy dissipation of elements at crack tip plastic zone, so that crack growth will be arrested. The crack growth rate will not recover until the crack tip exceed the affected region. Meanwhile, the crack growth rate is mainly determined by the amplitude rather than the mean load under the condition of small scale yielding. The proposed model would be helpful for predicting the growth rate of mode I elastic-plastic fatigue crack.

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“…At present, there are many methods can be used to suppress crack propagation, including stop-crack holes, penetration composite materials, bonding repair of composite materials, welding repair etc [1]. Many studies have shown that laser peening (LP) can remarkably enhance the fatigue strength of alloys [2][3][4][5]. Ren et al [6] investigated the mechanical properties of 00Cr12 alloy at high temperatures altered by laser shock processing (LSP).…”

Section: Introductionmentioning

confidence: 99%

Fatigue Failure Analysis on Precracked 304 Stainless Steel Components Repaired by Laser with Addition of Nanocomposites

Wang

Jiang

2019

Soldag. insp.

Self Cite

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The service life of components can be extended by repairing fatigue crack with laser so as to improve resource utilization rate. However, the effect of laser repair may be influenced by the instability of laser treatment. To investigate the addition of nanocomposites on the laser repairing effect, fatigue test under uniaxial tension was carried out to evaluate the fatigue life of precracked 304 stainless steel components repaired by laser. According to the results obtained from fatigue tests, a probabilistic fatigue life distribution model considered the sampling size and discreteness of data was established based on the three-parameter Weibull distribution model and three-parameter stress-life equation. The results of probabilistic fatigue life distribution model show that the fatigue life of components repaired by laser with addition of WC nanocomposites can be enhanced significantly, especially the high cycle fatigue life. Moreover, the microstructure of repaired region show that the WC nanoparticles could refine the recrystallized grains and lead to the improvement of strength and toughness of material around crack tip, which are the main reason of improved fatigue life. Meanwhile, smooth surface of repaired region caused by WC nanoparticles can also prevent the initiation of microcracks.

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Fatigue life of stainless steel 304 enhancement by addition of multi-walled carbon nanotubes (MWCNTs)

Cited by 15 publications

References 20 publications

Influence of MIG/MAG Welding Process on Mechanical and Pitting Corrosion Behaviors on the Super-Duplex Stainless Steel SAF 2507 Welded Joints

Influence of MIG/MAG Welding Process on Mechanical and Pitting Corrosion Behaviors on the Super-Duplex Stainless Steel SAF 2507 Welded Joints

Numerical Simulation and Experimental Studies on Elastic-Plastic Fatigue Crack Growth

Fatigue Failure Analysis on Precracked 304 Stainless Steel Components Repaired by Laser with Addition of Nanocomposites

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