Comparison of damaging behavior of oxide scales grown on austenitic stainless steels using tensile test and cyclic thermogravimetry

Федорова, Е. Н.; Braccini, M.; Parry, Valérie; Pascal, C.; Mantel, Marc; Roussel-Dherbey, Francine; Oquab, Djar; Wouters, Y.; Monceau, Daniel

doi:10.1016/j.corsci.2015.11.012

Cited by 22 publications

(14 citation statements)

References 31 publications

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“…Tensile specimens were machined from these plates using electrical discharge machining. Their geometry presents a gauge section of 2 mm width by 1-mm thick and a gauge length of 3 mm [8]. Prior to oxidation, samples were cleaned in an ultrasonic bath with acetone followed by high-purity ethanol.…”

Section: Methodsmentioning

confidence: 99%

“…96 Ni-1.13 Mn-0.46 Si wt%) with grain size around 15-20 lm provided by Ugitech was chosen as substrate. Details of alloy production and composition are described in [8,9]. Samples were obtained from 22 mm diameter rod.…”

Section: Methodsmentioning

confidence: 99%

“…However, for austenitic stainless steels oxidized above 800°C, the accelerated inward interfacial diffusion of oxygen results in silica internal oxidation along the grain boundaries [7]. In a previous paper, we have shown that internal oxidation of Si along the grain boundaries modifies the damaging behavior of the oxide scale [8].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Relations Between Oxidation Induced Microstructure and Mechanical Durability of Oxide Scales

et al. 2016

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OATAO is an open access repository that collects the work of Toulouse researchers and makes it freely available over the web where possible. This is an author-deposited version published in: http://oatao.univ-toulouse.fr/ Eprints ID : 18118 Abstract Most industrial heat-resistant stainless steels contain silicon as a minor constituent. At high temperature, the internal formation of amorphous silica reduces oxidation rates but decreases the metal/oxide interface toughness. Tensile testing experiments performed on AISI 304L previously oxidized in synthetic air for 50 h at 900 or 1000°C showed a relation between the silica morphology and location and the crack patterns. A micromechanical modeling using cohesive zone models to describe interfaces fracture behavior is proposed to investigate relevant parameters controlling the silica/alloy interface debonding. Calculations carried out using the finite elements method have shown that location of silica inclusions and silica/metal interface toughness are key parameters determining the cracks pattern morphology and the critical strain at failure.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

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Relations Between Oxidation Induced Microstructure and Mechanical Durability of Oxide Scales

et al. 2016

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“…Preferential segregation/depletion of alloying elements occurred at grain boundaries: the segregation of Mo, S, Co and Ni at the random HAGBs along with a depletion of Cr after hot corrosion. The presence of S segregations also at intact interfaces and at oxide grain boundaries affects the oxide growth mechanism [20]. ∑3 boundaries show few preferential enrichment/depletion of any alloying element, that is, indicating that these boundaries are resistant to hot corrosion.…”

Section: Diffusion-controlled Oxidation Mechanism In Grain Boundariesmentioning

confidence: 99%

“…Our previous study [21] implies that grain boundary sliding contributes significantly to dissipation in oxide layers during hot rolling. If the oxidised grain boundary is under tension, both the metal and the oxide scale during thermal cycling tend to facilitate crack initiation [20]. A mechanism has been addressed for stress-aided grain boundary oxidation ahead of cracks.…”

Section: Effect Of Grain Boundaries On Tribological Performancementioning

confidence: 99%

Grain Boundary in Oxide Scale During High-Temperature Metal Processing

Yu¹,

Zhou²

2017

Study of Grain Boundary Character

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Grain boundary in oxide scale has profound influences on the deformation behaviour and tribological properties of metal alloys at high temperature. This chapter introduces some recent progress to quantify microstructure and interface quality, providing examples of possible property variations. Some fundamental issues of oxidation mechanism have been given, consisting of crystal structures of iron oxides and oxidation of steel alloys. Two main things are addressed: One is what the characters of grain boundaries are developed in the oxide scale, which is associated with grain shape and size, microtexture, and special grain boundaries such as coincident site lattice (CSL) boundaries. Another is the role of grain boundaries played during metal processing, including initial oxidation via grain boundary diffusion, stress and deformation processing, and tribological properties of oxide scale at metal processing. Finally, a more extensive effort was also made to summarise the experimental techniques used to investigate oxide scale.

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The Effect of Boron and Titanium Microalloying on the Scale Formation of AISI 304 Austenitic Stainless Steel in Simulated Walking Beam Furnace Conditions

Laukka

Heikkinen

Puukko

et al. 2017

steel research int.

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The effect of microalloying boron and titanium on AISI 304 austenitic stainless steel scale formation is studied. Thermogravimetric tests simulating walking beam furnace conditions are performed at temperatures of 800, 1100, and 1300 °C for 3 h on samples of AISI 304 steels with different alloying amounts of B and Ti. Scaling at 800 °C is negligible on all the samples, while scaling is clear at 1100 and 1300 °C. The thermogravimetric results show that even in small amounts, boron and titanium have an effect on scale growth rate. FESEM microscopy and accompanying EDS analyses are used to study oxidation area element composition. The FESEM images are also used to compare the oxidation zones’ area fractions of metal, pores, and oxide between different alloying amounts for the samples of 1300 °C tests. Calculations for scale formation activation energy are done based on the thermogravimetric data. The steel sample with the lowest alloying of boron and titanium shows a noticeably different growth rate, which is nearly linear in both the 1100 and 1300 °C tests. Differences between alloying amounts in accumulated scale during the 180 min period in kg m−2 are greater at 1100 °C than they are at 1300 °C.

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Comparison of damaging behavior of oxide scales grown on austenitic stainless steels using tensile test and cyclic thermogravimetry

Cited by 22 publications

References 31 publications

Relations Between Oxidation Induced Microstructure and Mechanical Durability of Oxide Scales

Relations Between Oxidation Induced Microstructure and Mechanical Durability of Oxide Scales

Grain Boundary in Oxide Scale During High-Temperature Metal Processing

The Effect of Boron and Titanium Microalloying on the Scale Formation of AISI 304 Austenitic Stainless Steel in Simulated Walking Beam Furnace Conditions

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