Characterization of nanocrystallised multilayered metallic materials produced by the SMAT followed by constrained compression

Bajda, Szymon; Dymek, S.; Krzyżanowski, Michał; Retraint, Delphine; Majta, Janusz; Lisiecki, Łukasz; Kwiecień, Marcin

doi:10.1016/j.matchar.2018.08.046

Cited by 6 publications

(4 citation statements)

References 59 publications

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“…As shown in Figure 5, the microhardness of the treated sample gradually decreases with depth and ultimately reaches a constant value (191 ± 2 HV) at a depth of 80 μm, which represents the sub-surface layer affected by the SMAT process. The maximum hardness was obtained near the specimen surface, and its value decreased along the depth direction, which was consistent with the results of previous works [24,25]. The observed surface strengthening was attributed to the grain refinement, compressive residual stress, strain hardening, and high dislocation density induced by the severe plastic deformation [6,7].…”

Section: Characteristics Of Smat-processed 316l Samplessupporting

confidence: 91%

Effect of surface mechanical attrition treatment on stainless steel corrosion

Ran

Zhang

Wen

et al. 2020

Surface Engineering

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Surface mechanical attrition treatment (SMAT) is a unique method for the nanoscale refinement of a surface grain structure without changing the alloy chemical composition. Herein, the effect of SMAT on the corrosion resistance of 316L stainless steel in artificial sea water used as a corrosive medium has been investigated. As a result, a passive film and a nanostructured layer were formed on the SMAT-processed 316L stainless steel surface, which considerably increased its corrosion resistance during short-term testing. However, after a long-term exposure to the corrosive medium, the treated sample exhibited deterioration of its corrosion properties because of the micro-strain build-up and the presence of defects in the surface layer. The findings of this work suggest that SMAT can be potentially used for providing short-term corrosion protection to stainless steel objects immersed in aqueous saline media.

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Section: Characteristics Of Smat-processed 316l Samplessupporting

confidence: 91%

Effect of surface mechanical attrition treatment on stainless steel corrosion

Ran

Zhang

Wen

et al. 2020

Surface Engineering

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“…After AFPB, the hardness increased from the 4.6 GPa of the AP-ed sample to be 7.56 GPa of the SN-ed sample. Numerous studies have confirmed that the formation of nanograins and dislocations after nanocrystallization are important factors in improving surface hardness [18][19][20]. Therefore, the formation of nanograins after SFPB plays the fine grain strengthening effect on AISI321 stainless steel.…”

Section: Effect Of Sfpb On the Mechanical And Tribological Properties...mentioning

confidence: 97%

Reduction of Friction and Wear for AISI321 Stainless Steel through Surface Modification Using Nanocrystallization

Ding

2023

Materials

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Through surface nanocrystallization and low-temperature ion sulfurization, the nanocrystalline/FeS thin film with excellent friction-reduction and antiwear properties was fabricated on the surface of AISI321 stainless steel. The nanocrystallization treatment formed the high hardness and active nanocrystalline structure on the surface of AISI321, with the harness increased from 4.6 GPa to 7.56 GPa. Furthermore, the significantly refined nanostructure strongly increased the concentration of S element in comparison with the single-sulfurized layer on the substrate. Tribological tests reveal that both the original AISI321 substrate and the single-sulfurizing-treated samples are subject to severe abrasion. Single nanocrystallization treatment can improve the wear resistance of AISI321, while the compound treatment can obviously improve the comprehensive tribological properties. The compound-modified layer presents excellent tribological properties with the lowest coefficient of friction (COF) of 0.33, which is related to the increased hardness of the substrate and increased thickness, density, and homogeneity of the sulfurized layer. Furthermore, a physical model is developed for the vacuum tribological behavior of the samples after different treatments. This model provides a reference for revealing the tribological mechanism of the compound-modified layer treated using surface nanocrystallization-assisted chemical heat treatment.

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“…The nano-hardness of SNT-ed is slightly higher than the ST-ed. Numerous studies have con rmed that the formation of nano-grains and dislocations after nanocrystallization is an important factor in improving surface hardness [18][19][20]. Therefore, the formation of nano-grains after SFPB plays the ne grain strengthening effect on AISI321 stainless steel, and the surface hardness of AISI321 stainless steel increases from 4.6 GPa to 7.56 GPa.…”

Section: Effect Of Sfpb On the Mechanical And Tribological Properties...mentioning

confidence: 99%

The friction-reduction and anti-wear mechanism of AISI321 stainless steel treated by surface nanocrystallization assisted sulfurization

Ding

Li²

2023

Preprint

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Through compound treatment of surface nanocrystallization and low-temperature ion sulfurization, the compound-modified layer (nanocrystalline/FeS film) with excellent friction-reduction and anti-wear properties was fabricated on the surface of AISI321 stainless steel. A comparative study is conducted on the element distribution, microstructure, and vacuum tribology properties (1 × 10‒4 Pa) of compound-treated samples, single-related samples (surface nanocrystallization or low-temperature ion sulfurization), and original substrate samples. The nanocrystallization treatment formed the high hardness, high activity nanocrystalline structure on the surface of AISI321, which results in significantly refined microstructure, increased thickness and concentration of S element in the compound-sulfurized layer compared to the single-sulfurized layer on the substrate. Tribological tests reveal that both the original AISI321 substrate and the single-sulfurizing treated samples are subject to severe abrasion. Single nanocrystallization treatment can improve the wear resistance of AISI321, while the compound treatment can obviously improve the comprehensive tribological properties with milder wear and lower friction of coefficient. The good tribological properties of the compound-modified layer are related to the enhancement of substrate hardness and the increase of the thickness, density, and homogeneity of the sulfurized layer. Furthermore, a physical model is developed for the vacuum tribological behavior of the samples after different treatments. This model provides a reference for revealing the tribological mechanism of the compound-modified layer treated by surface nanocrystallization assisted chemical heat treatment.

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Characterization of nanocrystallised multilayered metallic materials produced by the SMAT followed by constrained compression

Cited by 6 publications

References 59 publications

Effect of surface mechanical attrition treatment on stainless steel corrosion

Effect of surface mechanical attrition treatment on stainless steel corrosion

Reduction of Friction and Wear for AISI321 Stainless Steel through Surface Modification Using Nanocrystallization

The friction-reduction and anti-wear mechanism of AISI321 stainless steel treated by surface nanocrystallization assisted sulfurization

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