Nanoscale surface modification of AISI 316L stainless steel by severe shot peening

Bagherifard, Sara; Slawik, Sebastian; Fernández-Pariente, I.; Pauly, Christoph; Mücklich, Frank; Guagliano, Mario

doi:10.1016/j.matdes.2016.03.162

Cited by 221 publications

(85 citation statements)

References 38 publications

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“…Second, the surface coverage represents the ratio of the area covered by the shots' indentations, as compared to the total area of the surface treated. The surface roughness of the SP part improves along with the increase of surface coverage, until stabilizing at a constant value [14].…”

Section: Introductionmentioning

confidence: 96%

“…Various studies have reported that SP could improve the hardness, fatigue strength, and tensile strength of the part surface of conventional materials, such as Al alloys [11,12] and Ti6Al4V [13]. The main process parameters of SP are the Almen intensity and surface coverage [14]. First, the Almen intensity represents the arc height calculated from a shot-peened Almen strip due to the incident kinetic energy generated on the sample surface from the shots' impact [15].…”

Section: Introductionmentioning

confidence: 99%

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Influence of Shot Peening on AlSi10Mg Parts Fabricated by Additive Manufacturing

Maamoun

Elbestawi

Veldhuis

2018

JMMP

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Abstract:The additive manufacturing (AM) of aluminum alloys promises to considerably enhance the performance of lightweight critical parts in various industrial applications. AlSi10Mg is one of the compatible Al alloys used in the selective laser melting of lightweight components. However, the surface defects obtained from the as-built parts affect their mechanical properties, and thus represent an obstacle to using them as final products. This study aims to improve the surface characteristics of the as-built AlSi10Mg parts using shot peening (SP). To achieve this goal, different SP intensities were applied to various surface textures of the as-built samples. The SP results showed a significant improvement in the as-built surface topography and a higher value of effective depth using 22.9 A intensity and Gp165 glass beads. The area near the shot-peened surface showed a significant microstructure refinement to a specific depth due to the dynamic precipitation of nanoscale Si particles. Surface hardening was also detected and high compressive residual stresses were generated due to severe plastic deformation. The surface characteristics obtained after SP could result in a significant improvement in the mechanical properties and fatigue strength, and thus promise performance enhancement for critical parts in various industrial applications.

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Section: Introductionmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

Influence of Shot Peening on AlSi10Mg Parts Fabricated by Additive Manufacturing

Maamoun

Elbestawi

Veldhuis

2018

JMMP

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“…By means of shot peening [8], a gradient nanocrystalline structure with the grain size ranging from the nanometer scale to the micrometer scale was obtained in the bulk coarse-grained TC4 alloy. Bagherifard et al [9,10] used severe shot peening (SSP) to process 316L stainless steel. Their results indicated that SSP transformed the austenite phase into a strain-induced α -martensite in a layered deformation band structure and induced near surface grain refinement to the nano and sub-micron range.…”

Section: Introductionmentioning

confidence: 99%

Nanocrystallization in the Duplex Ti-6Al-4V Alloy Processed by Multiple Laser Shock Peening

Zhou

Ren

Liu

et al. 2016

Metals

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Laser shock peening of titanium alloys has been widely applied in the aerospace industry. However, little is known of the nanocrystalline formation characteristics and mechanisms. In this investigation, a nanocrystalline layer was formed in the duplex Ti-6Al-4V titanium alloy surface region by means of multiple pulsed laser shock peening (LSP). The phase transition and residual stress characteristics of LSP samples were analyzed with X-ray diffraction (XRD) and scanning electron microscopy (SEM). Transmission electron microscopy (TEM) was used to characterize the microstructure and morphologies. As the number of laser pulses increased for each location, higher grain refinement was observed. Micro-hardness testing showed that hardness increased with the number of pulses delivered to each location due to the formation of nanocrystalline layers and high dislocation density in the samples, and a gradient variation of the micro-hardness was obtained. In addition, mechanical twins and different dislocation configurations were formed in the α phase region while only dense dislocation tangles were observed in the β phase region after multiple laser pulse impacts.

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“…There are various methods of surface enhancement. For example, induction hardening [1,2] and shot peening [3][4][5] are very popular. High strength and abrasion resistance can be given by the induction hardening; the surface is hardened while the toughness in the core is maintained.…”

Section: Introductionmentioning

confidence: 99%

Effect of Tip Shape of Frictional Stir Burnishing Tool on Processed Layer’s Hardness, Residual Stress and Surface Roughness

Takada

Sasahara

2018

Coatings

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Friction stir burnishing (FSB) is a surface-enhancement method used after machining, without the need for an additional device. The FSB process is applied on a machine that uses rotation tools (e.g., machining center or multi-tasking machine). Therefore, the FSB process can be applied immediately after the cutting process using the same machine tool. Here, we apply the FSB to the shaft materials of 0.45% C steel using a multi-tasking machine. In the FSB process, the burnishing tool rotates at a high-revolution speed. The thin surface layer is rubbed and stirred as the temperature is increased and decreased. With the FSB process, high hardness or compressive residual stress can be obtained on the surface layer. However, when we applied the FSB process using a 3 mm diameter sphere tip shape tool, the surface roughness increased substantially (R a = 20 µm). We therefore used four types of tip shape tools to examine the effect of burnishing tool tip radius on surface roughness, hardness, residual stress in the FSB process. Results indicated that the surface roughness was lowest (R a = 10 µm) when the tip radius tool diameter was large (30 mm).

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Nanoscale surface modification of AISI 316L stainless steel by severe shot peening

Cited by 221 publications

References 38 publications

Influence of Shot Peening on AlSi10Mg Parts Fabricated by Additive Manufacturing

Influence of Shot Peening on AlSi10Mg Parts Fabricated by Additive Manufacturing

Nanocrystallization in the Duplex Ti-6Al-4V Alloy Processed by Multiple Laser Shock Peening

Effect of Tip Shape of Frictional Stir Burnishing Tool on Processed Layer’s Hardness, Residual Stress and Surface Roughness

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