Influences of Mo on stress corrosion cracking susceptibility of newly developed FeCrMnNiNC-based lean austenitic stainless steels

Ha, Heung Yong; Seo, Wongyu; Park, Jun Yong; Lee, Tae‐Ho; Kim, Sangshik

doi:10.1016/j.matchar.2016.08.006

Cited by 21 publications

(6 citation statements)

References 57 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…While, from bottom to top, the resistance to various forms of localized corrosion could be enhanced. Experimentally, Mo, Ti, V and W were used to increase the resistance to intergranular stress-corrosion in various austenitic stainless steels [40][41][42]. This design map could provide a basis for the design of high-performance austenitic stainless steels.…”

Section: Design Map Of Fecr20ni8 Based Alloysmentioning

confidence: 99%

Elastic Properties of FeCr20Ni8Xn (X = Mo, Nb, Ta, Ti, V, W and Zr) Austenitic Stainless Steels: A First Principles Study

Dou

Luo

2019

Metals

View full text Add to dashboard Cite

Austenitic stainless steels suffer from intergranular corrosion and stress corrosion cracking when exposed to elevated temperature (500-800 • C). Under these environments, Cr-carbides and Cr-carbontrides precipitate at the grain boundaries, which results in the formation of Cr-depleted zone. In practice, alloying elements could be added into austenitic stainless steels to modify the precipitation processes. Besides the precipitation processes, the elastic properties of the iron matrix would be influenced. Using the exact muffin-tin orbitals (EMTO) method, the solute effects on the elastic properties of FeCr 20 Ni 8 austenitic stainless steels were studied. Based on the simulated shear modulus (G) and bulk modulus (B), we proposed a design map for FeCr 20 Ni 8 based alloys, aiming to provide a basis for the design of high-performance austenitic stainless steels.It should be noted that a lower value of B means the atomic bond is weaker. Consequently, materials with a low value of B exhibit relatively poor resistance to various forms of localized corrosion (such as intergranular corrosion, pitting corrosion and stress-corrosion cracking) [10,[12][13][14]. Furthermore, Clerc et al. have demonstrated the hardness of the annealed metal is proportional to G [15]. It is commonly known that high a value of the B/G ratio (>1.75) often results in ductility, while a low value of the B/G ratio (<1.75) often results in brittleness [10,11,14,[16][17][18].Potentially, alloying elements (such as Mo, Nb, Ta, Ti, V, W and Zr) might be added into austenitic stainless steels to suppress the Cr-carbides and Cr-carbontrides. In addition to the precipitation processes, the elastic properties of the iron matrix would also be influenced. In this work, we simulated the solute effects on the elastic properties of FeCr 20 Ni 8 austenitic stainless steels. We also calculated the difference (E BCC -E FCC ) between body-centered cubic (BCC) and face-centered cubic (FCC) structure. The solute concentrations considered in this work are 1 at.% and 2 at.%.

show abstract

Section: Design Map Of Fecr20ni8 Based Alloysmentioning

confidence: 99%

Elastic Properties of FeCr20Ni8Xn (X = Mo, Nb, Ta, Ti, V, W and Zr) Austenitic Stainless Steels: A First Principles Study

Dou

Luo

2019

Metals

View full text Add to dashboard Cite

show abstract

“…Austenitic stainless steels are widely used in components designed for high temperature applications like nuclear power stations, superheaters, and thermal power plant [1]. However, some localized corrosion such as pitting corrosion [2,3], intergranular corrosion [4], stress corrosion crack (SCC) [5,6] were often observed especially in the temperature range of 450-900 °C. The chromium carbides (Cr 23 C 6 ) are is easily precipitated and resulted into sensitization in the grain boundaries.…”

Section: Introductionmentioning

confidence: 99%

Characterization of Passive Films Formed on As-received and Sensitized AISI 304 Stainless Steel

Zhang

Luo

Zhong

et al. 2019

Chin. J. Mech. Eng.

View full text Add to dashboard Cite

The current research of corrosion resistance of stainless steels mainly focuses on characterization of the passive films by point defect mode and mixed-conduction model. The corrosion resistance of the passive films formed on asreceived and sensitized AISI304 stainless steel in borate buffer solution were evaluated in this paper. The degree of sensitization and corrosion resistance of AISI304 stainless steels was evaluated by double loop electrochemical potentiodynamic reactivation and electrochemical impedance spectroscopy. The passive films formed on the stainless steels were studied by XPS technique. It was found that as-received specimen had higher pitting corrosion potential and corrosion resistance than sensitized one. The Mott-Schottky results showed that sensitized stainless steel had more defects in the passive film than as-received one. The compositions of the passive films were mainly Cr and Fe oxides according to XPS results.

show abstract

“…Furthermore, the concept states that as the pit depth expands, the corrosion attack rate decreases; hence, this is satisfied with results in this in-situ study, employing the AFM in live recording mode of surface evolution on dual-phase high carbon steels by NaCl solution for hours. Further evidence was provided and an investigation was performed to support corrosion rate results that were acquired from the weight loss analysis by plotting Tafel polarisation curve [24,25] from the multichannel potentiostat instrument, as shows in Figure 5 below: Further evidence was provided and an investigation was performed to support corrosion rate results that were acquired from the weight loss analysis by plotting Tafel polarisation curve [24,25] from the multichannel potentiostat instrument, as shows in Figure 5 below: Further evidence was provided and an investigation was performed to support corrosion rate results that were acquired from the weight loss analysis by plotting Tafel polarisation curve [24,25] from the multichannel potentiostat instrument, as shows in Figure 5 below: The extrapolation of Tafel curves presented the combination of cathodic slope (left hand side) and anodic slope (right hand side). The cathodic curves were defined by activation control and performed linearly in correspondence with Tafel plot relationship, while the deviation from anodic curves contributed to the passivation, corrosion, and degradation on anode surface of the sample [26][27][28][29][30][31].…”

Section: Resultsmentioning

confidence: 99%

The Effect of Low-Quantity Cr Addition on the Corrosion Behaviour of Dual-Phase High Carbon Steel

Handoko

Pahlevani

Sahajwalla

2018

Metals

View full text Add to dashboard Cite

Industrial application of high carbon low alloy steel with the dual-phase structure of martensite and austenite has increased drastically in recent years. Due to its excellent compression strength and its high abrasion resistance, this grade of steel has used as a high performance cutting tool and in press machinery applications. By increasing the usage of more corrosive media in industrial practice and increasing the demand for reducing the production cost, it is crucial to understand the effect of the small addition of Cr on the corrosion behaviour of this grade of steel. In this study, this effect was investigated using Secondary Electron Microscopy (SEM) and in-situ Atomic Force Microscopy (AFM) in the sodium chloride solution. Also, the corrosion rate was measured using the Tafel polarisation curve. It has been found that the small addition of Cr increased the stability of retained austenite, thus improving its corrosion resistance and reducing its corrosion rate. This effect has been acquired through in-situ high resolution topography images in which the samples were submerged in a corrosive solution. It has been demonstrated that the corrosion rate was reduced when the stability of austenite enhanced.

show abstract

Influences of Mo on stress corrosion cracking susceptibility of newly developed FeCrMnNiNC-based lean austenitic stainless steels

Cited by 21 publications

References 57 publications

Elastic Properties of FeCr20Ni8Xn (X = Mo, Nb, Ta, Ti, V, W and Zr) Austenitic Stainless Steels: A First Principles Study

Elastic Properties of FeCr20Ni8Xn (X = Mo, Nb, Ta, Ti, V, W and Zr) Austenitic Stainless Steels: A First Principles Study

Characterization of Passive Films Formed on As-received and Sensitized AISI 304 Stainless Steel

The Effect of Low-Quantity Cr Addition on the Corrosion Behaviour of Dual-Phase High Carbon Steel

Contact Info

Product

Resources

About