Effects of laser shock processing on mechanical properties of Fe–Ni alloy

Lu, Jinzhong; Zhang, L.; Feng, Aixin; Yin, Jiuli; Cheng, Guanggui

doi:10.1016/j.matdes.2009.02.015

Cited by 55 publications

(15 citation statements)

References 39 publications

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“…At last, the plastic deformation layer of the material surface appears and the uniform, beneficial compressive residual stress is gained to improve the mechanical Table 3 Welding parameters selected in the present study. property of the material [22][23][24]. The schematic diagram of the LSP process can be seen in literature [22].…”

Section: Principle and Experimental Procedures Of Lspmentioning

confidence: 99%

Effects of laser shock processing with different shocked paths on mechanical properties of laser welded ANSI 304 stainless steel joint

Zhang

Luo

et al. 2011

Materials Science and Engineering: A

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Section: Principle and Experimental Procedures Of Lspmentioning

confidence: 99%

Effects of laser shock processing with different shocked paths on mechanical properties of laser welded ANSI 304 stainless steel joint

Zhang

Luo

et al. 2011

Materials Science and Engineering: A

Self Cite

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“…Using the LSP technology much progress has been undertaken to improve the properties of metallic materials. Those are namely, fatigue life [28 -29], fracture toughness [29,30] hardness and wear [31 -32], tensile properties [33], stress corrosion behaviour [35 -36]; residual stress [37 -38]; material microstructure respectively [39 -40], using LSP as an independent technology and recently the introduction of hybrid laser shock peening [41].…”

Section: Introductionmentioning

confidence: 99%

Surface engineering alumina armour ceramics with laser shock peening

Shukla

Robertson

et al. 2017

Materials & Design

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Citation: SHUKLA, P.P., 2017. Surface engineering alumina armour ceramics with laser shock peening. Materials and Design, 134, Additional Information:• results showed an increase in the surface hardness by 10% which was confirmed by a reduction in Vickers indentations size by 5%. The respective flaw sizes of the Vickers indentations were also reduced (10.5%) and inherently increased the KIc (12%). Residual stress state by X-ray diffraction method showed an average stress of -64 MPa after LSP, whilst the untreated surface stress measured +219 MPa. Further verification with the fluorescence method revealed surface relaxation with a maximum residual stress of -172 MPa after LSP of the Al2O3 armour ceramic. These findings are attributed to a microstructural refinement, grain size reduction and an induction of compressive stress that was relaxing the top/near surface layer from the pre-existing tensile stresses after LSP.Further process refinement/optimization will provide better control of the surface properties and will act as a strengthening technique to improve the performance of armour ceramics to stop bullets for a longer period of time and protect the end-users.

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“…Surface mechanical treatments, such as ultrasonic shot peening [9,10], mechanical attrition [11,12], laser shock peening [13,14], burnishing [15,16], and deep rolling [17,18], are the appropriate methods to increase the density of crystalline defects in the surface regions via a surface severe plastic deformation. By applying these treatments, three effects consisting of ''work hardening'', ''structural alteration'', and ''residual stress induction'' are achieved in surface zones [9,11,14,16,17].…”

Section: Introductionmentioning

confidence: 99%

Influence of surface nano/ultrafine structure formed via pre-deep rolling process on the plasma nitriding characteristics of the AISI 316L stainless steel

2017

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Influence of deep rolling prior to plasma nitriding on microstructure and hardness of the AISI 316L stainless steel was investigated in this paper. Deep rolling using 'ball-point' tool was conducted on the 316L stainless steel bar at multiple passes. Then, plasma nitriding was performed on the as-received and deep-rolled kinds at 450°C temperature for 5 h. Structural characterisation was done using optical microscope, field emission scanning electron microscope, feritscope, X-ray diffractometer, and glow discharge optical emission spectroscope as well as hardness measurement by a Vickers micro-hardness tester at 0.1 kgf. An ultrafine structure and a nitrogen-rich layer were, respectively, formed on the rolled and nitrided surfaces. Surface hardness was increased from 210 up to 450, 670 and 1050 HV 0.1 after the rolling, nitriding, and rollingnitriding processes, respectively. Thickness of the nitrided layer was increased from 12 to 20 lm and diffusion depth of nitrogen from 12 to 25 lm via conducting the deep rolling before the nitriding process. The rolling-nitriding process was resulted in rising of nitrogen concentration by a factor of about 3 at near-surface regions.

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Effects of laser shock processing on mechanical properties of Fe–Ni alloy

Cited by 55 publications

References 39 publications

Effects of laser shock processing with different shocked paths on mechanical properties of laser welded ANSI 304 stainless steel joint

Effects of laser shock processing with different shocked paths on mechanical properties of laser welded ANSI 304 stainless steel joint

Surface engineering alumina armour ceramics with laser shock peening

Influence of surface nano/ultrafine structure formed via pre-deep rolling process on the plasma nitriding characteristics of the AISI 316L stainless steel

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