Investigation of microstructure and mechanical properties evolution in 7050 aluminum alloy and 316L stainless steel treated by laser shock peening

Jing, Yandong; Fang, Xuewei; Xi, Naiyuan; Feng, Xianlu; Huang, Ke

doi:10.1016/j.matchar.2021.111571

Cited by 32 publications

(4 citation statements)

References 61 publications

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“…Figure 4(a) illustrates a Obviously, the original structure is mainly composed of polygonal grains that distribute along multiple directions. After LP treatment, the coarse austenite grain is refined and a large number of parallel lamellar twins seem to appear in the surface layer as shown in Figure 4(d), which may be attributed to the property of face-centered cubic stainless steel (Jing et al, 2021). Therefore, under the high strain rate of laser peening, the stored energy is enough to generate deformation twin in the shocked area (Ji et al, 2012).…”

Section: Microstructure Analysismentioning

confidence: 99%

Effect of multiple laser peening on the wear resistance of 304 stainless steel

Li,

Liu,

Zhang

et al. 2024

ILT

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Purpose The purpose of this paper is to investigate the effect of laser peening (LP) on mechanical and wear properties of 304 stainless steel sheet. Design/methodology/approach Three-dimensional morphology, micro-hardness and micro-structure of shocked samples were tested. The wear amount, wear track morphology and wear mechanism were also characterized under dry sliding wear using Al2O3 ceramics ball. Findings The LP treatment generates deformation twins that contribute to the grain refinement and hardness increase. The wear test displays that the wear mechanism of samples is mainly abrasive wear and oxidation wear at 10 N load. While at 30 N, the delamination and adhesion areas of treated sample are reduced visibly compared to untreated ones. Originality/value This study specifically investigates the mechanical and wear properties of 304 stainless steel after the direct action of LP on its surface, which shows an effective improvement on the wear resistance. For example, the wear loss of processed sample is reduced by 19% at 30 N, the friction coefficient decreases from 0.4714 to 0.4308 and the groove depth is reduced from 78.1 to 74.4 µm under same condition. Peer review The peer review history for this article is available at: https://publons.com/publon/10.1108/ILT-01-2024-0007/

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Section: Microstructure Analysismentioning

confidence: 99%

Effect of multiple laser peening on the wear resistance of 304 stainless steel

Li,

Liu,

Zhang

et al. 2024

ILT

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“…With nanosecond laser shock peening, the affected depth can go up to 1 mm for different materials. [19,20] A thin affected depth of hundred μm can be achieved in FLSP due to the ultrashort pulse duration and transient shock wave. [21] Dense dislocations serve as potential glide sources for uniform crystalline changes, such as twinning, [1] phase transition, [22,23] and grain refinement.…”

Section: Introductionmentioning

confidence: 99%

Magnetic Field‐Assisted Laser Shock Peening of Ti₆Al₄V Alloy

Qian

Cai

et al. 2023

Adv Eng Mater

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Laser shock peening is widely used in mechanical property improvements of metallic materials. One concerning factor is the nonuniformity of mechanical properties and microstructures, such as surface hardness and grain refinement. Herein, a new strengthening strategy that integrates femtosecond laser shock peening and pulse magnetic field that can uniformize the performance of metallic materials is proposed. With the magnetic field‐assisted laser shock peening (MFLSP), the reduction of preferred‐clustering points shows uniform grain refinement with the maximum area fraction of small grains. The fabrication of uniform grain refinement is attributed to the dislocation redistribution by the release of pinning effect. With magnetic field stimulation, dislocation lines are observed to disperse from low‐angle grain boundary to the intragranular area. Dislocation behaviors stimulated by magnetic field are attributed to atomic migration. The dispersed dislocations serve as potential glide sources for grain refinement during laser‐induced plastic deformation. The enhanced grain refinement results in uniform surface hardening of metallic materials. The application of this integrated strategy with laser processing and external energy field can be used for adjusting mechanical properties of metallic materials with uniform microstructures and surface hardness.

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“…In the past few decades, a series of new peening processes have been derived from mechanical peening in order to overcome these limitations, including laser shock peening (LSP), water jet peening (WJP) and cavitation water jet peening (CWJP). LSP can produce high dislocation density, significant grain refinement and high-peak residual compressive stress on the surface of parts; thus, effectively improving the mechanical properties of these parts [4][5][6]. However, it requires a long processing time and expensive equipment.…”

Section: Introductionmentioning

confidence: 99%

Performance Analysis of 7075 Aluminum Alloy Strengthened by Cavitation Water Jet Peening at Different Scanning Speeds

Yang

Gao²,

Wang

et al. 2022

Crystals

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Shot peening technologies can improve the performance of materials and extend the service life of parts. Cavitation water jet peening (CWJP) is a new shot peening technology that uses the shear effect of a high-speed jet in a submerged environment to produce a cluster of bubbles, thereby achieving a significant increase in impact performance. In this paper, CWJP was used to strengthen the surface of the 7075 aluminum alloy (Al7075), and the effects of CWJP with different scanning speeds on its microstructure and mechanical properties were investigated. The morphology evolution revealed that the plastic deformation of the sample surface became more serious and the surface roughness increased with the decrease in scanning speed. The distribution of residual stress and microhardness along the depth direction of the Al7075 was measured before and after the CWJP impact, and it was found that CWJP causes work hardening on the surface of the Al7075 and can convert the subsurface tensile stress of the Al7075 into compressive stress. The mechanism of grain refinement of the Al7075 during plastic deformation was systematically revealed. Therefore, CWJP can effectively improve the surface properties of the 7075 aluminum alloy.

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Investigation of microstructure and mechanical properties evolution in 7050 aluminum alloy and 316L stainless steel treated by laser shock peening

Cited by 32 publications

References 61 publications

Effect of multiple laser peening on the wear resistance of 304 stainless steel

Effect of multiple laser peening on the wear resistance of 304 stainless steel

Magnetic Field‐Assisted Laser Shock Peening of Ti₆Al₄V Alloy

Performance Analysis of 7075 Aluminum Alloy Strengthened by Cavitation Water Jet Peening at Different Scanning Speeds

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Investigation of microstructure and mechanical properties evolution in 7050 aluminum alloy and 316L stainless steel treated by laser shock peening

Cited by 32 publications

References 61 publications

Effect of multiple laser peening on the wear resistance of 304 stainless steel

Effect of multiple laser peening on the wear resistance of 304 stainless steel

Magnetic Field‐Assisted Laser Shock Peening of Ti6Al4V Alloy

Performance Analysis of 7075 Aluminum Alloy Strengthened by Cavitation Water Jet Peening at Different Scanning Speeds

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Magnetic Field‐Assisted Laser Shock Peening of Ti₆Al₄V Alloy