Resistance to sensitization and intergranular corrosion through extreme randomization of grain boundaries

Wasnik, D.N.; Kain, V.; Samajdar, I.; Verlinden, Bert; De, P.K.

doi:10.1016/s1359-6454(02)00306-3

Cited by 145 publications

(87 citation statements)

References 51 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…대부 분의 결정입계공학의 기구는 많은 쌍정의 생성과 관계되어 있으며, 이러한 쌍정은 Σ3 경계 중의 하나로서 이는 작은 적층결함에너지를 갖는 금속 및 합금에서 나타난다. 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

View full text Add to dashboard Cite

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.

show abstract

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

View full text Add to dashboard Cite

show abstract

“…The results of the heat treated AISI 304 steel samples also presented those fluctuations on current densities, suggesting that heat treatment influenced not only on the formation of M 23 C 6 type carbides and of other secondary phases, but also influence on the reorganization of the crystal structure of the studied steel, suggesting that it is possible to occur increase of the Gibbs free energy on the grain/surface interface, favoring the adsorption of the electrolyte on the surface of steel with the increasing of temperature and/or the heat treatment time, as well as the grain/grain interface, on two aspects: the first aspect due to the fact that the secondary phases precipitation generate a large number of discordances, according to Wasnik et al [20], Sieurin [21], and Tavares et al [22], fostering the pitting formation; the second aspect comes from the fact that the grain reorganization increase the thermal and electrical conductivity of the AISI 304 steel, leading to increased current density of the of the heat treated steel, in relation to their respective matrix, according to the related on Buscail et al [23] and Arjmand [24] works.…”

Section: Potentiodynamic Polarization In Nacl 35 Wt%mentioning

confidence: 93%

Intergranular Corrosion of AISI 304 Heat Treated at 800 °C Varying Range Times

Viana¹,

Venturini²,

Souza³

2015

JCCE

View full text Add to dashboard Cite

Austenitic stainless steels, when exposed to welding conditions or aging for length of service, it's observed the formation of numerous deleterious phases, such as several kinds of carbides type MC, M 6 C, M 7 C 3 , M 23 C 6 , and intermetallic secondary phases (sigma, chi, laves), which cause the process of intergranular corrosion. The aim of this work was verifying the formation of the types of carbides and/or intermetallic phases existing in the stainless AISI 304 at 800 ºC, varying the timing of heat treatment between 30, 360 and 1,440 min. The optical microscopy analysis revealed the predominant formation of the carbide type M 23 C 6 . The results of DL-EPR (double loop electrochemical potentiokinetic reactivation) tests showed a gradual increase in the precipitation of this carbide with the increase of treatment time. The potentiodynamic polarization showed that the precipitation of this carbide reduce the formation of the Cr 2 O 3 passive layer, suggesting that the precipitate carbide to be predominantly of the Cr 23 C 6 type.

show abstract

“…Therefore, N V is usually a measured parameter; for example, when nucleation occurs at grain boundaries, N V ∝ L −1 where L is the mean lineal intercept defining the grain size. Even this approach is vague because it fails to account for structure of the boundary; the potency of a grain boundary as a nucleation site is in practice a strong function of its crystallographic character [24][25][26].…”

Section: Nucleationmentioning

confidence: 99%

Advances in the Kinetic Theory of Carbide Precipitation

Bhadeshia

2003

MSF

View full text Add to dashboard Cite

Abstract. The precipitation, coarsening and reversion of carbides can determine the quality of steels. This paper is a review of efforts towards better, practical theory for all of these solid-state reactions. IntroductionCarbides are the essence of thermomechanically-processed microalloyed steels which are used in the hundreds of millions of tonnes in creating the infrastructure which leads to a better quality of life. Carbides also feature in special steels, such as the creep-resistant alloys which allow a greater efficiency in the generation of electricity. There is therefore a requirement to understand and model all aspects of carbides in the microstructure of iron and its alloys.

show abstract

Resistance to sensitization and intergranular corrosion through extreme randomization of grain boundaries

Cited by 145 publications

References 51 publications

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

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

Intergranular Corrosion of AISI 304 Heat Treated at 800 °C Varying Range Times

Advances in the Kinetic Theory of Carbide Precipitation

Contact Info

Product

Resources

About