The effect of plastic pre-strain on low-temperature surface carburization of AISI 304 austenitic stainless steel

Peng, Yawei; Gong, Jianming; Jiang, Yong; Fu, Minghui; Rong, Dongsong

doi:10.1016/j.surfcoat.2016.05.047

Cited by 49 publications

(23 citation statements)

References 33 publications

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“…On assumption that dislocation density of un-prestrained specimen is ρ0, the relative dislocation densities ρ/ρ0 measured by XRD are depicted in Figure 5. ρ/ρ0 increases monotonously with prestrain, in agreement with the results of past studies [37,42]. In fact, there is a large amount of low angle boundaries in prestrained 304L specimens, Figure 4b-e.…”

Section: Twin Boundaries and Dislocation Densitiessupporting

confidence: 91%

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Effect of α′ Martensite Content Induced by Tensile Plastic Prestrain on Hydrogen Transport and Hydrogen Embrittlement of 304L Austenitic Stainless Steel

Wang

2018

Metals

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Effects of microstructural changes induced by prestraining on hydrogen transport and hydrogen embrittlement (HE) of austenitic stainless steels were studied by hydrogen precharging and tensile testing. Prestrains higher than 20% at 20 °C significantly enhance the HE of 304L steel, as they induce severe α′ martensite transformation, accelerating hydrogen transport and hydrogen entry during subsequent hydrogen exposure. In contrast, 304L steel prestrained at 50 and 80 °C and 316L steel prestrained at 20 °C exhibit less HE, due to less α′ after prestraining. The increase of dislocations after prestraining has a negligible influence on apparent hydrogen diffusivity compared with pre-existing α′. The deformation twins in heavily prestrained 304L steel can modify HE mechanism by assisting intergranular (IG) fracture. Regardless of temperature and prestrain level, HE and apparent diffusivity ( D app ) increase monotonously with α′ volume fraction ( f α ′ ). D app can be described as log D app = log ( D α ′ s α ′ / s γ ) + log [ f α ′ / ( 1 − f α ′ ) ] for 10 % < f α ′ < 90 % , with D α ′ is diffusivity in α′, s α ′ and s γ are solubility in α′ and austenite, respectively. The two equations can also be applied to these more typical duplex materials containing both BCC and FCC phases.

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Section: Twin Boundaries and Dislocation Densitiessupporting

confidence: 91%

“…The determinations of ε 2 1/2 and d by using the XRD patterns have been reported elsewhere [35]. Although the Williamson-Hall method is not the most precise method to determine the dislocation density, it is enough to identify the changing trend of dislocation density [14,37].…”

Section: Martensite Content and Dislocation Density Measurementsmentioning

confidence: 99%

Effect of α′ Martensite Content Induced by Tensile Plastic Prestrain on Hydrogen Transport and Hydrogen Embrittlement of 304L Austenitic Stainless Steel

Wang

2018

Metals

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“…The absorptance and emissivity at 400°C are also indicated in the legend. , reporting to fcc-austenite (1 1 1), bccmartensite (1 1 0) and austenite (2 0 0) phases, respectively (Peng et al, 2016). The very small peak appearing at 2h % 36°can be eventually related to (2 0 0) diffraction planes from b-W (Sibin et al, 2015).…”

Section: Development Of the Optical Stacksmentioning

confidence: 97%

Optical and structural analysis of solar selective absorbing coatings based on AlSiOx:W cermets

et al. 2017

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a b s t r a c tIt is reported in this work the development and study of the optical and structural properties of a solar selective absorber cermet based on AlSiO x :W. A four-layer composite film structure, W/AlSiO x :W(HA)/ AlSiO x :W(LA)/AlSiO x , was deposited on stainless steel substrates using the magnetron sputtering deposition method. Numerical calculations were performed to simulate the spectral properties of multilayer stacks with varying metal volume fraction cermets and film thickness. The chemical analysis was performed using X-ray photoelectron spectroscopy and the results show that in the high metal volume fraction cermet layer, AlSiO x :W(HA), about one third of W atoms are in the W 0 oxidation state, another third in the W x+ oxidation state and the last third in the W 4+ , W 5+ and W 6+ oxidation states. The X-ray diffractograms of AlSiO x :W layers show a broad peak indicating that both, W and AlSiO x , are amorphous. These results indicate that this film structure has a good spectral selective property that is suitable for solar thermal applications, with the coatings exhibiting a solar absorptance of 94-95.5% and emissivities of 8-9% (at 100°C) and 10-14% (at 400°C). The samples were subjected to a thermal annealing at 450°C, in air, and 580°C, in vacuum and showed very good oxidation resistance and thermal stability. Morphological characterizations were carried out using scanning electron microscopy and atomic force microscopy. Rutherford Backscattering experiments were also performed to analyze the tungsten depth profile.

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“…ECAUSE of its technological importance, 304 stainless steel (SS) has been the focus of a number of experimental studies [1][2][3][4][5][6][7]. 304 stainless steel was one of the Cr-Ni austenitic stain-less steel in 300 series stainless steel which is extensively used as it possess various applications such as house wear, chemical industry, building material, and food industry because of the excellent corrosion resistance, heat resistance and mechanical properties.…”

Section: Introductionmentioning

confidence: 99%

“…304 stainless steel was one of the Cr-Ni austenitic stain-less steel in 300 series stainless steel which is extensively used as it possess various applications such as house wear, chemical industry, building material, and food industry because of the excellent corrosion resistance, heat resistance and mechanical properties. [2][3] Austenitic stainless steels, characterized by a high work hardening rate and low thermal conductivity. [4] Austenitic stainless steel is thermodynamically stable over a wide range of temperatures and it can be hardened only by cold working.…”

Section: Introductionmentioning

confidence: 99%

Investigation of Cold Work Hardening Behavior of AISI 304 Stainless Steel

2017

Bali 2017 International Conference Proceeding IPCET-17, CM3E-17, ABEMS-17, ICEEE-17, ICCEE-17, ICASE-17, ICAFE-17, EBHRM-17, LH

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In this present study, the cold work hardening behavior of AISI 304 austenitic stainless steel has been investigated as a function of stress rate. For this purpose, tensile specimens were cut from coiled 304 stainless steel stripe with 12 mm width and 0.8 mm thickness. Different stress loads performed on each specimen at room temperature. Microstructures of the specimens were characterized by optical microscope and hardness values were compared. Experimental results showed that, hardness of AISI 304 stainless steel is increased by cold deformation drastically. Because of long homogenous plastic deformation area and very short necking period, grain orientation was only visible close the tensile load. This behavior is evaluated usefully in both production and serving conditions.

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The effect of plastic pre-strain on low-temperature surface carburization of AISI 304 austenitic stainless steel

Cited by 49 publications

References 33 publications

Effect of α′ Martensite Content Induced by Tensile Plastic Prestrain on Hydrogen Transport and Hydrogen Embrittlement of 304L Austenitic Stainless Steel

Effect of α′ Martensite Content Induced by Tensile Plastic Prestrain on Hydrogen Transport and Hydrogen Embrittlement of 304L Austenitic Stainless Steel

Optical and structural analysis of solar selective absorbing coatings based on AlSiOx:W cermets

Investigation of Cold Work Hardening Behavior of AISI 304 Stainless Steel

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