Effect of grain size on mechanical property and corrosion behavior of a metastable austenitic stainless steel

Zhao, Miaomiao; Wu, Hongyan; Lu, Jianing; Sun, Guangping; Du, Linxiu

doi:10.1016/j.matchar.2022.112360

Cited by 46 publications

(11 citation statements)

References 65 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It has been pointed out in several existed research that the refining of grain size down to nano scale could improve the corrosion resistance of stainless steel, [57][58][59] whereas, larger grains can increase the corrosion resistance of stainless steels with grain size in micrometer scale. Bosing et al claimed that increase in grain size for X46Cr13 MSS could decrease the lattice defect density in bulk material, which resulted in a less defective passive layer and offered a better resistance against pitting corrosion.…”

Section: Discussionmentioning

confidence: 99%

Underlying Mechanism for “Loss of Passivation” Effect of a High-Carbon Martensitic Stainless Steel Coating via Laser Cladding

Gao

Liu²,

Fang

et al. 2023

J. Electrochem. Soc.

View full text Add to dashboard Cite

Recently, laser cladding (LC) technology has become a cost-effective and convenient method to protect metal substrate from corrosion by producing metal coating with high corrosion resistance. In order to fully investigate the pitting mechanism for high-carbon martensitic stainless steel (HMSS) coating, the microstructure and pitting performance of HMSS samples produced via LC and hot isostatic pressing were comparatively investigated via electrochemical measurements and electron microscopies. Dendritic and network connected M23C6 carbides are the main precipitates in the HMSS coating, while the M23C6 carbides in HMSS bulk are spherical or elongated in shape. Pitting resistance of the HMSS coating is dramatically deteriorated. The massive and continuously distributed dendritic M23C6 carbides could form a large-area cathode and cause the micro-galvanic corrosion of the HMSS-LC coating matrix, thus can be considered as underlying factor for the “loss of passivation” effect of the HMSS coating.

show abstract

Section: Discussionmentioning

confidence: 99%

Underlying Mechanism for “Loss of Passivation” Effect of a High-Carbon Martensitic Stainless Steel Coating via Laser Cladding

Gao

Liu²,

Fang

et al. 2023

J. Electrochem. Soc.

View full text Add to dashboard Cite

show abstract

“…To describe Cr and Ni element distribution of the NG/UFG sample prepared by cryogenic rolling and annealing, a schematic of microstructural evolution and element distribution of the experimental steel is presented in Figure 12, based on the experimental results and previous studies [17,28,48,49]. As shown in Figure 12(a), the cryogenic-rolled microstructure consisted of dislocation-cell-type martensite with curved and ambiguous grain boundaries (CAGBs) and a few lath-type martensite (according to Figure 3 and our group's previous research [17]). Figure 12(b) shows the microstructure evolution of the experimental steel after isothermal annealing at 700°C for 20 min (according to Figure 4).…”

Section: Discussionmentioning

confidence: 99%

“…Generally, the NG/UFG metastable austenitic stainless steel structure prepared by cold rolling plus annealing treatment still contains some α -martensite [17,26]. As is well known, the solubility of Cr element in the body-centered cubic (BCC) structure is higher than that in the face-centered cubic (FCC) structure [17]. On the contrary, the solubility of Ni element in the FCC structure is higher than that in BCC structure due to the stable element of austenite in Ni.…”

Section: Introductionmentioning

confidence: 99%

Effect of element segregation on deformation mechanisms of nano/ultrafine-grained 304 stainless steel

Zhao

Liu

et al. 2023

Materials Science and Technology

Self Cite

View full text Add to dashboard Cite

The effect of Cr and Ni element segregation on austenite stability and deformation mechanisms of nano/ultrafine-grained 304 stainless steel obtained by cryogenic rolling plus annealing treatment was systematically studied. The results showed that the nano/ultrafine-grained steel had a good combination of strength and ductility (yield strength ∼896 MPa, tensile strength ∼977 MPa, and elongation ∼39.6%). According to the findings, the formation of Cr segregation in the body-centered cubic structure at the intersection of austenite grain boundaries and localised austenite grains with low Ni content reduced the austenite stability of the nano/ultrafine-grained steel and promoted the generation of strain-induced martensite during plastic deformation, resulting in the deformation mechanism dominated by the transformation-induced plasticity effect.

show abstract

“…The reason is that the optimization of the process parameters using the RSM in this experiment can make the welding process more stable, which is conducive to the uniform propagation of heat input in the weld and enables the ferrite to be transformed from a short dendritic crystal to a reticulated structure. The more stable reticulated grains are conducive to the generation of a dense passivation film during corrosion, reducing oxidation reactions and enhancing the corrosion performance of the material [33]. As can be seen from table 11, the Fe and O contents in welds L6, L9, L7, and L11 show a large increase compared to A1 and A2, while the Ni and Cr contents decrease.…”

Section: Corrosionmentioning

confidence: 94%

Double pulse gas metal arc welding process parameter optimization and weld performance analysis based on response surface method

Bin,

Yao,

et al. 2023

Mater. Res. Express

View full text Add to dashboard Cite

Double pulse gas metal arc welding (DP-GMAW) is a low-frequency modulated high-frequency pulse welding, which can fully stir the molten pool, and improve the forming and performance of the weld. In this study, a mathematical model was developed using the response surface method (RSM) with three main process parameters (welding current, peak-to-base ratio, welding speed) as input values with three key geometric characteristics parameters, and the mechanical properties of the resulting welds were investigated. The results showed that the parameter model developed in this study had less error and could optimize the process parameters better; the optimal process parameters (welding current, peak-to-base ratio, welding speed) were 160 A, 39.93%, and 83.11 cm min−1, respectively. The improved welding parameters result in better mechanical properties and better weld profile, and more stable welding process. As a result, this experiment provides a new perspective for process parameter optimization and mechanical properties research for weld manufacturing.

show abstract

Effect of grain size on mechanical property and corrosion behavior of a metastable austenitic stainless steel

Cited by 46 publications

References 65 publications

Underlying Mechanism for “Loss of Passivation” Effect of a High-Carbon Martensitic Stainless Steel Coating via Laser Cladding

Underlying Mechanism for “Loss of Passivation” Effect of a High-Carbon Martensitic Stainless Steel Coating via Laser Cladding

Effect of element segregation on deformation mechanisms of nano/ultrafine-grained 304 stainless steel

Double pulse gas metal arc welding process parameter optimization and weld performance analysis based on response surface method

Contact Info

Product

Resources

About