On the role of residual strain in controlling sensitisation of twin-boundary engineered type 304 stainless steel

Ahmedabadi, Parag M.; Kain, Vivekanand; Muralidhar, K. Venkata; Samajdar, I.

doi:10.1016/j.jnucmat.2012.07.036

Cited by 12 publications

(2 citation statements)

References 45 publications

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“…It has an excellent corrosion resistance and good ductility [1][2]. Austenitic stainless steels, including AISI 316L and 304, are widely used as structural materials in industries such as petrochemistry, transportation, ultra-supercritical power and nuclear power plants, mostly due to their high specific strength, ductility, fracture toughness and excellent corrosion resistance [3][4][5][6][7]. However, hydrogen embrittlement sensitization and formation of different carbides and sigma phase can also affect the mechanical properties.…”

Section: Introductionmentioning

confidence: 99%

Full-annealing and its effect on the Mechanical Properties of Alloy 304H Stainless Steel

Onwudili

Iweka

2021

JERR

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Stainless steel is an alloy of steel which contains at least 10.5% chromium, less than 1.2% carbon, and other alloying elements and it is widely used in many industries globally and their properties are highly influenced by their microstructure, heat treatment or by plastic deformation. But due to hardness, poor wear, and corrosion resistance, leading to short service life, there is need to investigate the effect of annealing on the mechanical properties of alloy 304H stainless steel and how the mechanical properties can be improved with a view of improving its service life and optimizing engineering usage. Sixteen (16) samples of the alloy were used. Twelve (12) samples were annealed at three different temperatures of 950oC, 1000oC and 1050oC inside a muffle furnace. At each temperature four samples were heat-treated inside the muffle furnace for 30 minutes. The result showed that the yield strength decreased from un-annealed sample to annealed samples at 950oC with a value of 504.8MPa and increased at 1000oC with a value of 610MPa and a decrease of 323.8 MPa was obtained at 1050oC. Also, the ultimate tensile strength showed an increase from 950oC with a value of 826.3MPa to 1000oC with a value of 930MPa but there was a slight decrease at 1050oC for all samples. The ultimate tensile strength at 1000oC with a value of 930MPa was the highest in all the samples. The annealed samples at 1000oC had the highest percentage elongation of 13.57% which shows an increase in the ductility of the material. The hardness of the material decreased from 157.25 BHN at 950oC to 134.00BHN at 1000oC. An increase to 169.50BHN was however obtained at 1050oC. Thus, full-annealing of alloy 304H stainless steel at 1000oC increases in ductility as hardness decreases.

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Section: Introductionmentioning

confidence: 99%

Full-annealing and its effect on the Mechanical Properties of Alloy 304H Stainless Steel

Onwudili

Iweka

2021

JERR

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“…It was considered that coarse crystal samples are more susceptible to sensitization and inter-granular corrosion than fine-grained samples because their anode and cathode area are lower [27]. It was reported that the degree of sensitization decreases exponentially with the increase of the grain boundary surface-area [28,29,30], which means that Cr is diffused from the inside to the grain boundary, thereby reducing the growth of carbide precipitates, delaying the sensitization process, and improving corrosion resistance. The above studies show that the grain size, in both magnesium alloy and stainless-steel, affects the corrosion behavior of the material and that grain refinement can improve the corrosion resistance of the material.…”

Section: Introductionmentioning

confidence: 99%

Effect of Hot Deformation Process Parameters on Microstructure and Corrosion Behavior of 35CrMoV Steel

Yang

Zhou

et al. 2019

Materials

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Hot deformation experiments of as-cast 35CrMoV steel, with strain rates of 0.01 s−1 and 10 s−1, deformation temperatures of 850, 950, and 1050 °C, and an extreme deformation reaching 50%, were carried out using a Gleeble-3810 thermal simulator. Electrochemical corrosion experiments were conducted on the deformed specimens. The microstructure was observed by optical microscope (OM), and the corrosion morphology and corrosion products of the specimens were investigated by scanning electron microscopy (SEM), energy disperse spectroscopy (EDS), confocal laser scanning microscopy (CLSM), and X-ray diffraction (XRD) techniques. The results show that the grain size increased gradually with an increase in the deformation temperature at the same strain rate, whereas the corrosion resistance deteriorated. At the same deformation temperature, the grain size becomes smaller as the strain rate increases, which enhances the corrosion resistance. This is mainly attributed to the fine grains, which can form more grain boundaries, increase the grain boundary area, and accelerate the formation of the inner rust layer at the beginning of corrosion. Moreover, fine grains can also refine the rust particles and enhance the bonding strength between the inner rust layer and the matrix. The denseness and stability of the inner rust layer increases as the corrosion process progresses, thereby improving corrosion resistance.

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The effect of grain boundary structure on sensitization behavior in a nickel-based superalloy

et al. 2018

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On the role of residual strain in controlling sensitisation of twin-boundary engineered type 304 stainless steel

Cited by 12 publications

References 45 publications

Full-annealing and its effect on the Mechanical Properties of Alloy 304H Stainless Steel

Full-annealing and its effect on the Mechanical Properties of Alloy 304H Stainless Steel

Effect of Hot Deformation Process Parameters on Microstructure and Corrosion Behavior of 35CrMoV Steel

The effect of grain boundary structure on sensitization behavior in a nickel-based superalloy

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