Grain-Size Effects on the High-Temperature Oxidation Behaviour of Chromium Steels

2010 ◽  
Vol 73 (5-6) ◽  
pp. 551-563 ◽  
Author(s):  
Vicente Trindade ◽  
Hans-Jürgen Christ ◽  
Ulrich Krupp
Keyword(s):  
Grain Size ◽  
High Temperature ◽  
Size Effects ◽  
High Temperature Oxidation ◽  
Oxidation Behaviour ◽  
Temperature Oxidation ◽  
Chromium Steels ◽  
Grain Size Effects

Review of Several Studies on High Temperature Oxidation Behaviour and Mechanism of Austenitic Stainless Steels

2011 ◽  
Vol 312-315 ◽  
pp. 1097-1105
Author(s):  
Hisao Fujikawa
Keyword(s):  
Grain Size ◽  
High Temperature ◽  
Oxide Scale ◽  
Oxidation Resistance ◽  
Stainless Steels ◽  
High Temperature Oxidation ◽  
Austenitic Stainless Steels ◽  
Oxidation Behaviour ◽  
Oxide Interface ◽  
Temperature Oxidation

Three studies on the oxidation behaviour of austenitic stainless steels were described in the present paper. (1) High temperature oxidation behaviour and its mechanism in austenitic stainless steels with high silicon: Sulfur contained as impurity in steel showed a harmful influence to the oxidation resistance of 19Cr-13Ni-3.5Si stainless steels. It was found that the abnormal oxidation was caused from the surroundings of MnS inclusions. (2) Effect of a small addition of yttrium on high temperature oxidation resistance of Si-containing austenitic stain less steels: The oxidation resistance of 19Cr-10Ni-1.5Si steels was improved remarkably even with only 0.01%Y addition, which is the same concentration as added for de-oxygenation. Y was enriched at the grain boundary of oxide scale and metal-oxide interface. It was suggested that Y-containing steels shoed good oxidation resistance, because the enriched Y at the grain boundary and metal-oxide interface prevented the diffusion of iron and oxygen ions through the oxide scale. (3) Effect of grain size on the oxidation behaviour of austenitic stainless steels: Type 304, 316 and 310 steels with finer grain size showed better oxidation resistance than those with coarser grain size at 850°C. The oxide scale of steels with coarser grain size easily spalled during the cooling process.

Effect of Grain Size on the High Temperature Oxidation Behaviour of Austenitic Stainless Steels

2013 ◽  
Vol 333 ◽  
pp. 149-155 ◽  
Author(s):  
H. Fujikawa ◽  
Y. Iijima
Keyword(s):  
Grain Size ◽  
High Temperature ◽  
Oxide Scale ◽  
High Temperature Oxidation ◽  
Mass Gain ◽  
Oxidation Behaviour ◽  
Solution Temperature ◽  
Oxide Interface ◽  
Temperature Oxidation ◽  
Coarse Grains

The effect of grain size on high temperature oxidation behaviour of 316 steels at 700º, 850º and 1000°C in air was studied. The results show that the mass gain increases with the increase of grain size. Particularly, the gradient of mass gain is severe in at lower oxidation temperatures. In the oxidation at temperatures of more than the solid solution temperature, the grain size before the oxidation changed to coarse grain size. Therefore, in this case, it is not enough to estimate the oxidation behaviour by the grain size before the oxidation. The exfoliation of oxide scale is severe in steel with coarse grains. Over 850°C, the exfoliation was observed in 316 steel with coarse grains. At 1000°C, the oxide scale of 316 steel was exfoliated, but it was extreme in the coarse grains. Cr, Mn and Si in the oxide scale were enriched in the oxide scale of the steel with fine grains. Particularly, Si was remarkably enriched at the metal-oxide interface and grain boundaries.

High temperature oxidation behaviour of Ti2AlC ceramic at 1200°C

2012 ◽  
Vol 29 (3) ◽  
pp. 205-209 ◽  
Author(s):  
G.M. Song ◽  
V. Schnabel ◽  
C. Kwakernaak ◽  
S. van der Zwaag ◽  
J.M. Schneider ◽  
...  
Keyword(s):  
High Temperature ◽  
High Temperature Oxidation ◽  
Oxidation Behaviour ◽  
Temperature Oxidation
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