Electrochemical behavior of laser shock peened Inconel 625 superalloy

Karthik, Durai; Stango, S. Arul Xavier; Vijayalakshmi, U.; Swaroop, S.

doi:10.1016/j.surfcoat.2016.12.105

Cited by 32 publications

(8 citation statements)

References 35 publications

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“…This shows that there was a tendency to reduce the corrosion rate in all the laser peened samples in comparison to the unpeened Cu, whereas the highest performance in corrosion rate reduction was found at LSPVC 50 %. The results not only confirm that the LSP modification is optimum at LSPVC 50 % but also showed that the LSP process is an effective method for Cu corrosion mitigation [7,9,19,51].…”

Section: Iu Corr − Ip Corrsupporting

confidence: 56%

Laser shock peening (LSP): Electrochemical and hydrodynamic investigation of corrosion protection pre-treatment for a copper surface in 3.5 % NaCl medium

et al. 2021

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Besides electrochemical corrosion protection, laser shock peening provides extended fatigue life and mechanical properties for metals, as reported in the literature. However, most of the studies were performed under static conditions. The effectiveness of this method under flow conditions and prolonged immersion duration is addressed in this study. Copper discs were peened with Nd: YAG laser in the presence of ~2 mm thickness of water and polyvinyl chloride to absorb the intensity and provide residual stress without surface damage. Electrochemical and hydrodynamic analyses indicate that the peened surface showed higher corrosion resistance in 3.5 % NaCl compared to the unpeened.

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Section: Iu Corr − Ip Corrsupporting

confidence: 56%

Laser shock peening (LSP): Electrochemical and hydrodynamic investigation of corrosion protection pre-treatment for a copper surface in 3.5 % NaCl medium

et al. 2021

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“…Over the previous two decades laser shock processing (LSP) has been recognized as an advanced, effective, fast emerging severe plastic deformation (SPD) technology which has been successfully applied to various materials to impart compressive residual stresses, various high-density dislocation configurations, grain refinement, improved fatigue, corrosion and wear resistance [7][8] [9][10] [11] [12][13] [14]. Authors [7] [10] have confirmed nanocrystalline structures with refined grains, dense dislocation walls and dislocation cells in the material surface as a consequence of laser-induced shock waves propagating into material.…”

Section: /35mentioning

confidence: 99%

Application of massive laser shock processing for improvement of mechanical and tribological properties

Trdan

Skarba

Porro

et al. 2018

Surface and Coatings Technology

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The present paper aims to investigate topographical, microstructural, mechanical and tribological behaviour of precipitation hardened Al alloy subjected to massive laser shock processing (LSP) without protective coating at 2500 pulses/cm², using three beam diameters.Wear tests under dry sliding conditions resulted in severe wear, whereas the main wear mechanisms were adhesion accompanied by abrasive wear. Nevertheless, LSP with optimal processing parameters reduce the friction coefficient and wear rate with lower degrees of adhesion and abrasion inside the wear track in comparison to the untreated sample. The enhanced tribological performance is attributed to the positive influence of LSP induced surface topography, surface compressive residual stresses (RS) and dense dislocation arrangements, as the result of high-pressure shock waves. Nonetheless, due to the narrow window of optimal parameters reduced wear resistance as a consequence of undesired thermal/softening effect due to laser ablation and melting was detected with non-optimal processing parameters. 2/35

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“…The potentiodynamic polarization method was applied using a Versastat3 potentiostat in a three‐electrode cell configuration, with the sample as a working electrode, a saturated silver chloride reference electrode and a platinum grid as the counter electrode. Experiments were performed in a 3.5 wt% sodium chloride solution buffered at pH 7.0, according to other literature …”

Section: Methodsmentioning

confidence: 99%

Corrosion and mechanical properties of age‐hardened UNS N06625 forged bars for oil and gas applications

Febbrari

Gelfi

Giovanardi

et al. 2019

Materials & Corrosion

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UNS N06625 is a well-known nickel-base superalloy generally used in annealed condition due to its excellent corrosion resistance in the most severe environments containing sulfides and chlorides at high pressure and temperature. In general, the most efficient way to increase the alloy strength is by cold working, but obviously, this cannot be applied in case of large forgings. Actually, looking at its chemical composition, UNS N06625 can be considered an age-hardenable material, whose mechanical strength can be improved by promoting the second phase γ″ precipitation in the matrix. The aim of this paper was to assess the achievable mechanical properties and corrosion resistance of UNS N06625 forged bars in agehardened condition with respect to the annealed one, to understand the feasibility of this not conventional heat treatment for the industrial application. K E Y W O R D S age hardening, corrosion resistance, mechanical strength, second phase γ″, UNS N06625

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Electrochemical behavior of laser shock peened Inconel 625 superalloy

Cited by 32 publications

References 35 publications

Laser shock peening (LSP): Electrochemical and hydrodynamic investigation of corrosion protection pre-treatment for a copper surface in 3.5 % NaCl medium

Laser shock peening (LSP): Electrochemical and hydrodynamic investigation of corrosion protection pre-treatment for a copper surface in 3.5 % NaCl medium

Application of massive laser shock processing for improvement of mechanical and tribological properties

Corrosion and mechanical properties of age‐hardened UNS N06625 forged bars for oil and gas applications

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