Study of the austenitic stainless steel with gradient structured surface fabricated via shot peening

He, Yinsheng; Yoo, Keun Bong; Ma, Houyu; Shin, Keesam

doi:10.1016/j.matlet.2017.12.021

Cited by 38 publications

(4 citation statements)

References 8 publications

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“…It gradually decreased and stabilized at 14.2 nm after 20 minutes of shooting. The increase in dislocation density produces deformation strengthening, which hinders the expansion of the deformation layer into the interior [4].…”

Section: Microstructure Of Surface Nanocrystallization 304j1mentioning

confidence: 99%

“…The change in microstructure and mechanical properties, including wear, fatigue, and corrosion resistance, is a result of shot peening [3]. Surfaceforming nanostructures, dislocation densities, twinning activity, and deformation-inducing layers [4] result in significant grain refinement and residual compressive stresses. Alterations in grain size, augmentation of grain boundary ratio, and the emergence of a nano-grain layer can create distinctive characteristics from the interior of coarse grains.…”

Section: Introductionmentioning

confidence: 99%

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Surface nano crystallization and nitriding on microstructure and properties of 304J1 stainless steel

Lian,

Zhang,

Wang

et al. 2024

J. Phys.: Conf. Ser.

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To improve the mechanical and antibacterial properties of 304J1 stainless steel, hybrid surface treatments, which include nitriding combined with shot peening operations, are used. Shot peening with different sizes of steel balls makes the material’s surface nanocrystalline, providing more diffusion channels for subsequent nitrogenating, and the nitriding efficiency is improved. Nitrogen cannot only improve the antibacterial property but also significantly enhance the strength of 304J1. The experimental results show that within a certain depth, the surface of 304J1 can be nanosized by shot peening for 20 min with a projectile diameter of 0.2 mm. The depth of the nitriding layer reaches 0.6 um, the surface hardness increases from 560 HV to 1100 HV, and the antibacterial property against Escherichia coli increases from 10% to 85%.

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Section: Microstructure Of Surface Nanocrystallization 304j1mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Surface nano crystallization and nitriding on microstructure and properties of 304J1 stainless steel

Lian,

Zhang,

Wang

et al. 2024

J. Phys.: Conf. Ser.

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“…130) These techniques create GS materials, i.e., they are HSMs and do not require any posterior heat-treatments. Several GS materials have been developed by surface nanostructuring techniques like peening-based processes, [131][132][133][134][135][136][137][138][139][140][141][142][143] surface mechanical attrition treatment (SMAT), blasting, [172][173][174][175][176][177][178][179][180] ultrasonic surface deformation-based processes, 132,140,142,[181][182][183][184][185][186][187][188][189][190][191][192][193][194][195][196][197][198] and surface mechanical rolling treatment. [199][200][201] From all the above, the most widely reported are SMAT and shot peen...…”

Section: Surface Nanostructuringmentioning

confidence: 99%

Heterostructured Materials by Severe Plastic Deformation: Overview and Perspectives

Romero-Resendiz,

Naeem,

Zhu

2023

Mater. Trans.

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Heterostructured materials (HSMs) constitute heterogeneously distributed soft and hard zones with a mismatch in mechanical or physical properties of at least 100% between them. A synergistic effect resulting from the interactive coupling between the heterogeneous zones surpasses the properties predicted by the rule of mixtures. Therefore, the mechanical or physical properties of HSMs are not achievable by their homogeneous counterparts. HSM production commonly requires plastic deformation to refine the microstructure and subsequent partial recrystallization heat-treatments to obtain heterogeneous distributions of grain size, texture, or defect density. Other routes are by applying surface plastic deformation or by stacking layers with a high property mismatch between them. All of those routes can be achieved by severe plastic deformation (SPD) techniques. This overview focuses on describing the fundamentals of HSMs produced by SPD. A critical description of the physics of SPD and HSMs, as well as the factors influencing their microstructural evolution, perspectives, and outstanding issues, are included. A critical comparison of the strength-ductility relationship in HSMs produced by different SPD techniques is also included to guide upcoming research. This overview is intended to serve as a basis for understanding and designing future HSMs produced by SPD.

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“…Surface grain refinements based on surface severe plastic deformation (SPD) treatments such as severe shot peening (SP) [1,2], ultrasonic impact/peening treatment (UIT/UPT) [3,4] and surface mechanical attrition treatment (SMAT) [5,6] have been applied widely to austenitic stainless steels (ASSs), in order to harden their surface layers and thus enhance their wear and fatigue resistance. However, significant strain-induced α martensite transformation and high density of microstructure defects such as dislocations may accompany with the grain-refinement process in the surface layers, degrading substantially the corrosion/stress-corrosion and hydrogen embrittlement (HE) resistance of the ASSs.…”

Section: Introductionmentioning

confidence: 99%

Surface Grain Refinement of 304L Stainless Steel by Combined Severe Shot Peening and Reversion Annealing Treatment

Zhou

et al. 2020

Coatings

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The present study proposes a novel method, i.e., combined severe shot peening (SP) and reversion annealing treatment, to grain-refine the surface layers of 304L austenitic stainless steel. Steel specimens were shot-peened at 0.7 MPa for 30 min, introducing 40% vol. α′ martensite, and then were annealed at 700 or 800 °C for different durations (30 s). As annealing reversed α′ martensite to austenite, the obtained surface layers consist of fully austenitic ultrafine grains. The smallest grain size obtained is about 500 nm at the top surface. SP elevates the microhardness to more than 500 HV. Although the grain-refined surface layers produced by the combined method are not as hard as that treated by only SP, they are harder (e.g., the specimen annealed at 700 °C for 30 s using a heating rate of 50 °C/s exhibited a peak microhardness of 400 HV) than the untreated surface layer (225 HV) due to grain refinement. Moreover, due to the absence of α′ martensite, they have higher corrosion resistance in H2SO4 solution than that treated by only SP.

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Study of the austenitic stainless steel with gradient structured surface fabricated via shot peening

Cited by 38 publications

References 8 publications

Surface nano crystallization and nitriding on microstructure and properties of 304J1 stainless steel

Surface nano crystallization and nitriding on microstructure and properties of 304J1 stainless steel

Heterostructured Materials by Severe Plastic Deformation: Overview and Perspectives

Surface Grain Refinement of 304L Stainless Steel by Combined Severe Shot Peening and Reversion Annealing Treatment

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