Effects of Shot Peening on Corrosion and Stress Corrosion Cracking Behaviors of Sensitized Alloy 600 in Thiosulfate Solution

Tsai, Wen‐Ta; Chang, Chia-Hao; Lee, J.-T.

doi:10.5006/1.3293507

Cited by 27 publications

(12 citation statements)

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“…The effects of compression can more-easily be studied by using residual stress. Residual compressive stress, such as developed by methods like shot peening, is commonly used on surfaces of engineering structures to prevent corrosion fatigue [9,10]. Like shot peening, low plastic burnishing (LPB) imparts a high-magnitude residual compressive stress on the surface of a sample with minimal cold work [12].…”

Section: Effects Of Residual Compressive Stress On Igcmentioning

confidence: 99%

“…Application of a compressive stress modified electrochemical reactivity and inhibited pitting initiation [4]. More practically, the development of residual compressive stress at the surface of a part by shot peening is a standard preventive measure against SCC [5][6][7][8][9]. Recently, surface compressive residual stress layers have been found to retard pitting corrosion and corrosion fatigue in Al alloys [10,11].…”

Section: Introductionmentioning

confidence: 99%

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Effects of compressive stress on localized corrosion in AA2024-T3

2006

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The effect of compressive stress on intergranular corrosion (IGC) of AA2024-T3 was studied using a constant load and simultaneous electrochemical measurement. A specially designed electrochemical cell was used to compress a pillar-shaped sample and control the potential at a value that promoted IGC. The extent of IGC was assessed by metallurgical cross-sectional images. The effect of the compressive stress depended on the orientation of the stress relative to the elongated microstructure. Application of a compressive stress halfway to yield in the S or through-thickness direction significantly reduced the growth kinetics of IGC in the longitudinal direction, but did not eliminate it totally. The strain change during exposure also was used to quantify the change in radius of the cylindrical sample as a function of time during IGC growth. The effect of compression on reducing IGC was also assessed by the current density measured during potentiodynamic and potentiostatic polarization. The effects of residual compressive stress on IGC were studied using samples treated by low plastic burnishing (LPB), which produces a surface layer with high residual compressive stress. The results depended on the plane of the LPB treatment. A micro-capillary cell was used to measure corrosion behavior at different zones of the section of an LPB-treated sample. The breakdown potential was significantly higher in the zone with residual compressive stress than in the interior of the sample.

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Section: Effects Of Residual Compressive Stress On Igcmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effects of compressive stress on localized corrosion in AA2024-T3

2006

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“…Most of the data were obtained from U-bend tests, slow strain rate tests, constant load, and constant extension tests using nonprecracked specimens under steady stress conditions. [5][6][7][8][9][10] However, the crack propagation rate in the above alloy/environment system seldom has been reported. Recently, Tsai, et al, used a constant deflection technique incorporating a precracked specimen to determine the SCC growth rate in sensitized alloy 600 in a thiosulfate solution under applied potential conditions.…”

Section: Introductionmentioning

confidence: 97%

“…[2][3] Several studies have shown combinations of metallurgical factors, applied potential, and stressing conditions responsible for the SCC susceptibility of alloy 600 in thiosulfate solutions. [3][4][5][6] The resistance of alloy 600 to SCC in thiosulfate solution has been studied in several simulations and screening tests using different experimental techniques. Most of the data were obtained from U-bend tests, slow strain rate tests, constant load, and constant extension tests using nonprecracked specimens under steady stress conditions.…”

Section: Introductionmentioning

confidence: 99%

Corrosion Fatigue Crack Growth Rate in Sensitized Alloy 600 in Thiosulfate Solution at Room Temperature

Tsai

Kuoh

1999

CORROSION

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Corrosion fatigue crack growth (FCG) behavior of alloy 600 (UNS N06600) sensitized at 1,100°C/0.5 h + 700°C/5 h in 0.1 M sodium thiosulfate (Na 2 S 2 O 3 ) solution at room temperature under applied anodic potential conditions was investigated using the fracture mechanics technique. Results indicated the FCG rate depended upon the testing frequency and the applied potential. At a frequency of 1 Hz, FCG rates were independent of applied potential and nearly the same as those tested in a N 2 atmosphere. However, at a frequency of 0.1 Hz, the FCG rate increased with increasing applied potential. Moreover, the competition between environmental and mechanical effects influenced the fracture morphology of the corrosion fatigue of sensitized alloy 600.

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“…Alloy 600 is not completely resistant to different types of corrosion, depending on the environment, in which it is used, 11 the structural property 12 and the atmosphere, to which it is exposed. 13 One of the reasons for this is its lower percentage of chromium, which is 15 % of its weight.…”

Section: Introductionmentioning

confidence: 99%

Effect of PCGTAW on the Inconel 690 alloy with respect to microsegregation attainment in comparison with the base metal processed with autogenous welding

Sivalingam¹,

Sureshkannan²

2019

Mater. Tehnol.

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The mechanical properties and microstructure of weldments are always an imperative concern of researchers; therefore, the change from continuous gas tungsten arc welding (GTAW) to pulsed-current gas tungsten arc welding (PCGTAW) was investigated for alloy 690, using the autogenous welding method. The mechanical properties like the tensile strength and impact were examined for both variants (continuous and pulsed-current gas tungsten arc welding). The microstructure was the susceptible parameter, revealing a complete formation of the weldments. Hence, a complete analysis with an optical microscope of up to 400 μm and a SEM of up to 7000 μm was performed during the described examination. This analysis showed that the formation of the secondary phase was negligible in the case of the pulsed-current method, which was superior to the gas tungsten arc welding, exhibiting a tensile strength of 641 MPa and an impact strength of 66 J.

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Effects of Shot Peening on Corrosion and Stress Corrosion Cracking Behaviors of Sensitized Alloy 600 in Thiosulfate Solution

Cited by 27 publications

References 1 publication

Effects of compressive stress on localized corrosion in AA2024-T3

Effects of compressive stress on localized corrosion in AA2024-T3

Corrosion Fatigue Crack Growth Rate in Sensitized Alloy 600 in Thiosulfate Solution at Room Temperature

Effect of PCGTAW on the Inconel 690 alloy with respect to microsegregation attainment in comparison with the base metal processed with autogenous welding

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