Effect of grain refinement on the resistance of 304 stainless steel to breakaway oxidation in wet air

Xiao, Peng; Yan, Jiawei; Zhou, Yinggang; Wang, F.

doi:10.1016/j.actamat.2005.07.019

Cited by 219 publications

(112 citation statements)

References 24 publications

Supporting

Mentioning

110

Contrasting

Order By: Relevance

“…Figure 1 also shows that water vapour slightly decreases the oxidation rate relative to those registered in dry conditions and the apparent activation energy is higher in wet air. As proposed by other authors it could be due to weight losses related to the formation of the volatile hydroxide CrO 2 (OH) 2 [28][29][30]. At 1000 °C, the scale remains protective during the oxidation test in dry air, ( figure 1 and figure 2).…”

Section: Discussionmentioning

confidence: 50%

“…Galerie et al have explained that the breakaway on a Fe-15%Cr alloy was induced by rapid growth of hematite at the metal/chromia interface, at 800-1000 °C, in Ar-15 vol.% H 2 O [23]. But in many cases, the chromia scale failure was related to the formation of the CrO 2 (OH) 2 and Cr(OH) 3 volatile hydroxides [28][29][30]. Evaporation can lead to the alloy chromium depletion resulting in the formation of an iron-rich non-protective scale.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Influence of water vapour on 316L oxidation at high temperature - in situ X-Ray diffraction

Buscail¹,

Rolland²,

Perrier³

2015

Ann. Chim. Sci. Mat.

View full text Add to dashboard Cite

-Water vapour mixed with air (10 vol.% H 2 O) has little effect on the AISI 316L stainless steel oxidation under isothermal conditions at 800 and 900 °C. The oxide scale is composed of Cr 2 O 3 and Mn 1.5 Cr 1.5 O 4 located at the external interface. Results show that the presence of water lowers the specimen's mass gain. At 1000 °C, the effect of water vapour on the scale structure is deleterious. In situ X-ray diffraction permits to show that the breakaway is due to iron oxidation starting after about 30 hours. This leads to an external Fe 2 O 3 scale growth and an internal multilayered FeCr 2 O 4 scale formation.

show abstract

Section: Discussionmentioning

confidence: 50%

Section: Introductionmentioning

confidence: 99%

Influence of water vapour on 316L oxidation at high temperature - in situ X-Ray diffraction

Buscail¹,

Rolland²,

Perrier³

2015

Ann. Chim. Sci. Mat.

View full text Add to dashboard Cite

show abstract

“…• C the addition of water vapour has a detrimental effect on the protectiveness of the Cr-rich (Cr, Fe) 2 O 3 [4,5,6,7,8,9,10,11,12]. This because the water vapour reacts with the Cr-rich oxide which eventually causes Cr depletion due to vaporization and non-protective breakaway oxides [3,4,5,6,7,8,9,10,11,12] according to the following reaction [9,12] …”

Section: Introductionmentioning

confidence: 99%

“…The formation of non-protective breakaway oxides and the protectiveness of the Cr-rich oxide depend on the ratio between the Cr depletion and the supply of Cr by diffusion from the alloy [5,15,9,11]. There are different approaches to improve the supply of Cr to the protective scale, where increased Cr content is a common solution [6,16,13].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Surface phase transformation in austenitic stainless steel induced by cyclic oxidation in humidified air

et al. 2015

View full text Add to dashboard Cite

The formation of α' martensite at the surface of an AISI 304 stainless steel subjected to cyclic heating in humidified air is reported. The α' martensite formed during the cooling part of the cyclic tests due to local depletion of Cr and Mn and transformed back to austenite when the temperature again rose to 650• C. The size of the α' martensite region increased with increasing number of cycles. Thermodynamical simulations were used as basis for discussing the formation of α' martensite. The effect of the α' martensite on corrosion is also discussed.

show abstract

Effect of grain refinement on corrosion of ferritic–martensitic steels in supercritical water environment

Ren

Sridharan

Allen

2010

Materials & Corrosion

View full text Add to dashboard Cite

The effects of grain refinement on the corrosion behavior of three ferritic-martensitic (F/M) steels, HT9, T91, and NF616, and two binary model alloys Fe-15%Cr and Fe-18%Cr in supercritical water (SCW) have been investigated. Grain refinement down to a size of about one micron in the surface regions, was achieved by introducing severe plastic deformation by shot peening. After exposure to SCW with 25 ppb oxygen at 500 8C for up to 3000 h, an improvement in corrosion resistance was observed in grain-refined samples because of the enhanced diffusion of chromium on the surface, through a high density of grain boundaries. The chromium content in the steels and the exposure durations in SCW were determined to be important factors influencing the efficacy of the grain refinement effects. These results are supported by both experimental evidence and theoretical predictions. Another approach for grain refinement, equal channel angular pressing (ECAP), was also investigated for T91 steel. ECAP resulted in lower weight gain due to corrosion compared to the untreated samples, but exhibited a slightly higher weight gain compared to the shot-peened samples after long-term exposures in SCW which is probably caused by different fractions of high-angle grain boundaries in grain-refined regions, introduced by different grain refinement techniques.

show abstract

Effect of grain refinement on the resistance of 304 stainless steel to breakaway oxidation in wet air

Cited by 219 publications

References 24 publications

Influence of water vapour on 316L oxidation at high temperature - in situ X-Ray diffraction

Influence of water vapour on 316L oxidation at high temperature - in situ X-Ray diffraction

Surface phase transformation in austenitic stainless steel induced by cyclic oxidation in humidified air

Effect of grain refinement on corrosion of ferritic–martensitic steels in supercritical water environment

Contact Info

Product

Resources

About