Effect of Residual Stress on the Corrosion Behavior of Austenitic Stainless Steel

Takakuwa, Osamu; Soyama, Hitoshi

doi:10.4236/aces.2015.51007

Cited by 106 publications

(47 citation statements)

References 29 publications

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“…Residual stress in the alloys can affect the corrosion properties including stress corrosion cracking and corrosion fatigue. Recently, it was reported that compressive residual stress may improve the intergranular corrosion resistance 19,30,31) . Fig.…”

Section: Resultsmentioning

confidence: 99%

“…The nano-crystalline surface could increase the density of diffusion paths available for alloying elements to migrate and rapidly form a protective passive film 17,18) . In addition, residual stress in the surface layer affects the critical current density and the current density for passivation which are closely related to the formation and retention of the passivation layer 19) . The high mechanical energy imparted by UNSM to the steel surface may also induce the diffusion of the alloying elements 13,14,18) and therefore can affect the intergranular corrosion resistance of the stainless steels.…”

Section: Introductionmentioning

confidence: 99%

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Intergranular Corrosion Mechanism of Slightly-sensitized and UNSM-treated 316L Stainless Steel

Lee¹,

Kim²,

Pyoun³

et al. 2016

Corrosion Science and Technology

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316L stainless steels have been widely used in many engineering fields, because of their high corrosion resistance and good mechanical properties. However, welding or aging treatment may induce intergranular corrosion and stress corrosion cracking etc. Since these types of corrosion are closely related to the formation of chromium carbide in grain boundaries, the alloys are controlled by methods such as the lowering of carbon content, solution heat treatment. This work focused on the intergranular corrosion mechanism of slightly-sensitized and Ultrasonic Nano-crystal Surface Modification (UNSM)-treated 316L stainless steel.Samples were sensitized for 1, 5, and 48 hours at 650 ℃ in N 2 gas atmosphere. Subsequently UNSM treatments were carried out on the surface of the samples. The results were discussed on the basis of the sensitization by chromium carbide and carbon segregation, the residual stress and grain refinement. Even though chromium carbide was not precipitated, the intergranular corrosion rate of 316L stainless steel was drastically increased with aging time, and it was confirmed that the increased intergranular corrosion rate of slightly-sensitized (not carbide formed) 316L stainless steel was due to the carbon segregation along the grain boundaries. However, UNSM treatment improved the intergranular corrosion resistance of aged stainless steels, and its improvement was due to the reduction of carbon segregation and the grain refinement of the outer surface, including the introduction of compressive residual stress.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Intergranular Corrosion Mechanism of Slightly-sensitized and UNSM-treated 316L Stainless Steel

Lee¹,

Kim²,

Pyoun³

et al. 2016

Corrosion Science and Technology

View full text Add to dashboard Cite

show abstract

“…작은 Σ 경계 (이를 CSL(Coincidence Site Lattice 또는 special boundaries라 명명하고 있음))의 비율이 높을수록 특 성 개선이 이루어지는 것으로 보고되고 있다 [23][24][25][26][27][28][29][30][31][32][33] . 또한 입 계부식에 미치는 잔류응력의 영향에 대한 연구를 통하여 압축잔류응력이 존재하게 되면 부식을 억제시킬 수 있다고 보고하고 있으며 34) , 또한 최근의 결정립계 구조에 대한 연 구결과에 따르면 24) , 결정립계 현상(결정립계 확산 35) , 석출 36,37) , 부식 38,39) .…”

Section: 서론unclassified

Intergranular Corrosion of 316L Stainless Steel by Aging and UNSM (Ultrasonic Nano-crystal Surface Modification) treatment

Lee¹,

Kim

2015

Corrosion Science and Technology

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Austenitic stainless steels have been widely used in many engineering fields because of their high corrosion resistance and good mechanical properties. However, welding or aging treatment may induce intergranular corrosion, stress corrosion cracking, pitting, etc. Since these types of corrosion are closely related to the formation of chromium carbide in grain boundaries, the alloys are controlled using methods such as lowering the carbon content, solution heat treatment, alloying of stabilization elements, and grain boundary engineering. This work focused on the effects of aging and UNSM (Ultrasonic Nano-crystal Surface Modification) on the intergranular corrosion of commercial 316L stainless steel and the results are discussed on the basis of the sensitization by chromium carbide formation and carbon segregation, residual stress, grain refinement, and grain boundary engineering.

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“…The authors showed that the metallic dissolution was promoted by the presence of dislocation density and that the hydrostatic stress influenced the process of dissolution in the elastic range. Other authors have highlighted that residual stresses induced by surface finishing affected anodic polarization curve of an austenitic stainless steel . This paper demonstrated that compressive residual stresses decreased the passive current density and consequently enhanced the corrosion resistance.…”

Section: Introductionmentioning

confidence: 99%

Investigation of the passivation process of plastically deformed 316L stainless steel using the high frequency capacitance obtained by EIS

Boudinar¹,

Belmokre²,

Touzet

et al. 2018

Materials & Corrosion

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This paper was devoted to the study of changes of electrochemical processes (dissolution, passivation) induced by the plastic strain of a 316L austenitic stainless steel in a chloride acid solution (H2SO4 2 M + NaCl 0.5 M). For this purpose, potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) methods have been used for various plastic strain values. In order to only assess the effect of internal stresses created by various dislocation configurations on the dissolution and passivation processes without considering the surface roughness impact, electrochemical experiments have been carried out after polishing the specimen surface. The obtained results show that the electrochemical parameters (corrosion current, activation current peak, high frequency capacitance) change with the increase of plastic strain with the same behavior as the work hardening phases of the material in relation to dislocation pattern.

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Effect of Residual Stress on the Corrosion Behavior of Austenitic Stainless Steel

Cited by 106 publications

References 29 publications

Intergranular Corrosion Mechanism of Slightly-sensitized and UNSM-treated 316L Stainless Steel

Intergranular Corrosion Mechanism of Slightly-sensitized and UNSM-treated 316L Stainless Steel

Intergranular Corrosion of 316L Stainless Steel by Aging and UNSM (Ultrasonic Nano-crystal Surface Modification) treatment

Investigation of the passivation process of plastically deformed 316L stainless steel using the high frequency capacitance obtained by EIS

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