Effect of the Shot Peening Process on the Corrosion and Oxidation Resistance of AISI430 Stainless Steel

Peltz, Jefferson da Silva; Beltrami, Lílian Vanessa Rossa; Kunst, Sandra Raquel; Brandolt, Cristiane de Souza; Malfatti, Célia de Fraga

doi:10.1590/1516-1439.316514

Cited by 17 publications

(7 citation statements)

References 29 publications

(34 reference statements)

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Conforme a Tabela 3, os dois materiais na condição de superfície lixada apresentaram valores de rugosidade média (Ra) condizentes com o demonstrado por COSTA et al [19], que encontraram valores abaixo de 0,1 µm para os aços inoxidáveis AISI 316L e AISI S32750 com acabamento lixado na granulometria 500; e PELTZ et al [20] que encontraram 0,04 ± 0,01 µm para um aço inoxidável AISI 430 com acabamento lixado na granulometria 1200. Na avaliação da influência do tratamento de passivação química sobre o acabamento superficial dos aços inoxidáveis é possível observar pelas micrografias das Figuras 1 e 2 que as superfícies submetidas ao tratamento superficial de passivação química apresentaram em menor evidência as marcas provenientes do lixamento mecânico, entretanto do ponto de vista quantitativo não ocorreu efeito significativo, uma vez que a ordem de grandeza da rugosidade média (Ra) foi a mesma para ambos tratamentos superficiais.…”

Section: Resultsunclassified

Efeito do tratamento de passivação química na resistência à corrosão por pite dos aços inoxidáveis ferrítico AISI 430 e austenítico AISI 316L

2018

View full text Add to dashboard Cite

RESUMO Com o intuito de evitar ou minimizar a corrosão por pite dos aços inoxidáveis é possível aprimorar a capacidade protetiva da camada passiva dessas ligas, e um dos métodos para se obter esse resultado é o tratamento superficial de passivação química. Nesse contexto foi investigado o efeito do tratamento de passivação química com ácido nítrico na resistência à corrosão por pite e no acabamento superficial dos aços inoxidáveis ferrítico AISI 430 e austenítico AISI 316L em meio contendo cloreto. Para isso duas condições superficiais foram utilizadas para cada material: superfície lixada e superfície passivada quimicamente conforme a norma ASTM A967/967M. O acabamento superficial foi caracterizado pela avaliação da rugosidade média e análise visual por microscopia óptica. O comportamento frente à corrosão foi avaliado através de ensaios de polarização anódica cíclica em 0,6 M NaCl conforme norma ASTM G61 e a morfologia dos pites foi caracterizada por microscopia óptica. De acordo com os resultados, a resistência à corrosão por pite dos aços inoxidáveis AISI 430 e AISI 316L submetidos ao tratamento de passivação tiveram os potenciais de pite e de repassivação aumentados em relação ao valor obtido com a superfície lixada, ou seja, tiveram sua resistência à corrosão por pite melhorada.

show abstract

Section: Resultsunclassified

Efeito do tratamento de passivação química na resistência à corrosão por pite dos aços inoxidáveis ferrítico AISI 430 e austenítico AISI 316L

2018

View full text Add to dashboard Cite

show abstract

“…The logarithmic law, however, is applicable to very thin oxide films in the range of 20-40 nm (Ref 1, 3, 5). It has been observed previously that most of the iron-based high-temperature alloys exhibit parabolic kinetics of oxidation in the temperature range of 500-700°C ( Ref 1,[9][10][11][26][27][28][29].…”

Section: Oxidation Of the T91mentioning

confidence: 99%

“…Additionally, USP process protects the material against penetration of undesirable gases and liquids through removal of porosities (Ref 24). On the other hand, corrosion and oxidation resistance of alloys can also be improved through refinement of grains in surface region by USP (Ref [25][26][27][28][29]. Due to multiple random impacts of shots, severe plastic deformation occurs at the material surface and dislocation density of surface layers increases rapidly.…”

Section: Introductionmentioning

confidence: 99%

“…These can affect the diffusion mechanisms of diffusive alloying elements and hence can change the oxidation kinetics of these alloys ( Ref 25,29). For different ferritic/martensitic and stainless steels, the enhanced diffusion of chromium ions along the large number of dislocations and grain boundaries generated by USP leads to early formation of the protective chromium-rich oxide layer, which slows down further growth of the iron oxide layer due to its low permeability for Fe 2+ /Fe 3+ or O 2À through it (Ref [26][27][28][29].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Effect of Ultrasonic Shot Peening on Oxidation Behavior of T91 and SS347 Steels in Air and Steam at 650 °C

Mondal

Chattopadhyay

Singh

2020

J. of Materi Eng and Perform

View full text Add to dashboard Cite

Ultrasonic shot peening (USP) is a relatively new process of surface modification to improve mechanical properties as well as corrosion and high-temperature oxidation resistance of metallic materials. The effect of USP on surface properties and the process of high-temperature oxidation in air and steam environment, following USP of the T91 and SS347 steels, was studied in this investigation. Surface modification by USP was done on the T91 and SS347 steels for different time periods of 0.5, 1.0, 1.5, 2.0 and 3.0 min. Microstructural modification, increase in surface roughness and enhancement in microhardness up to a depth of 300-350 lm were observed due to USP. There was also increment in surface roughness as well as microhardness with USP time duration. Thermogravimetric analysis of the oxidation tests showed parabolic oxidation kinetics at 650°C for both the steels. Comparatively more protective oxide scales, containing high amount of Cr, were formed on the USP-treated samples. The thickness of the oxide scale was reduced with increase in the USP time duration. Oxidation resistance of the T91 steel at 650°C, both in air and steam, was improved by the USP treatment. Oxidation resistance of the SS347 steel at 650°C was also improved for the USP2.0 and the USP3.0 conditions.

show abstract

“…The shot peening processes can be defined as a cold surface treatment applied on finished parts obtained by the uniformly distributed impact of spherical grids, projected onto the surface of the material under conditions strictly controlled. The purpose of this process is to induce residual compression stresses on the metal surface and therefore, failures resulting from nucleation processes and growth of surface cracks such as fatigue and stress corrosion can be delayed [14]. When applied in restricted regions of a part causes changes in the equilibrium condition of stresses that result in geometric changes very useful in processes of forming or performing parts [15].…”

Section: Introductionmentioning

confidence: 99%

Excessive coverage effect (over peening) in the blasting operation of aluminum alloy “AA 7475-T7351” with steel shot

et al. 2020

View full text Add to dashboard Cite

Aluminum and its alloys are widely used in the aeronautics industry due to its high lightness and ductility, and it can add other elements, thus changing its characteristics. Fatigue is the major cause of failure of metal materials due to the dynamic and oscillating stresses of the finished materials. The objective of this work is to evaluate the effect of Shot Peening with coverage percentages 1blasting, 3 blasting and 10 blasting in fatigue life of aluminum alloy AA 7475-T351. Shot Peening is a cold surface treatment used to increase fatigue life of the alloy by inducing residual stresses of compression on the surface of the part. In the Shot Peening process, spherical steel grids of type S230 were used, in which the specimens were subjected to 1blasting, 3 blasting and 10 blasting coverage in two stress levels (42 Ksi and 50 Ksi). The results presented in the fatigue tests and electron scanning (SEM) showed the increase in the mechanical properties of all the samples, and those exposed to 1 blasting and 3 blasting presented better results.

show abstract

Effect of the Shot Peening Process on the Corrosion and Oxidation Resistance of AISI430 Stainless Steel

Cited by 17 publications

References 29 publications

Efeito do tratamento de passivação química na resistência à corrosão por pite dos aços inoxidáveis ferrítico AISI 430 e austenítico AISI 316L

Efeito do tratamento de passivação química na resistência à corrosão por pite dos aços inoxidáveis ferrítico AISI 430 e austenítico AISI 316L

Effect of Ultrasonic Shot Peening on Oxidation Behavior of T91 and SS347 Steels in Air and Steam at 650 °C

Excessive coverage effect (over peening) in the blasting operation of aluminum alloy “AA 7475-T7351” with steel shot

Contact Info

Product

Resources

About