Long-Term Oxidation Behavior of Selected High Temperature Alloys

2007 ◽  
Author(s):  
S. Krishna Srivastava ◽  
Michael J. Newburn ◽  
John P. Cotner ◽  
Mark A. Richeson
Keyword(s):  
High Temperature ◽  
Oxidation Behavior ◽  
Scanning Electron Micrographs ◽  
Corrosion Attack ◽  
Short Term ◽  
Haynes 230 ◽  
High Temperature Alloys ◽  
Oxidation Testing ◽  
Scanning Electron

Long-term oxidation behavior of alloys cannot be estimated reliably by extrapolation of short-term results; therefore long-term testing is imperative. Such data often are not available. Oxidation testing for a period of 360 days has been conducted for several high temperature alloys extensively used in the gas turbine industry. The alloys tested comprised of HASTELLOY® X alloy, HAYNES® 230®, HR-120®, and 214™ alloys, the first three being chromia forming and the last one being an alumina forming alloy. The specimens were exposed to flowing air at 1800°F(982°C), 2000°F(1093°C), 2100°F(1149°C) and 2200°F(1204°C). The tests were interrupted and the specimens were weighed every 30 days. At the completion of each test, the samples were examined metallographically to determine the internal attack. The magnitude of oxidation attack was studied in terms of the weight change and total metal affected. The paper will report the results of the long-term oxidation testing and the analysis of the corrosion attack with the optical and scanning electron micrographs. HASTELLOY, HAYNES, 230 and HR-120 are registered trademarks and 214 is a trademark of Haynes International, Inc.

High-Temperature Properties of SiC-Si3N4 Particle Composites

1999 ◽  
Vol 122 (1) ◽  
pp. 8-12 ◽  
Author(s):  
G. Woetting ◽  
B. Caspers ◽  
E. Gugel ◽  
R. Westerheide
Keyword(s):  
High Temperature ◽  
High Temperatures ◽  
Hot Pressing ◽  
Oxidation Behavior ◽  
Short Term ◽  
High Temperature Properties ◽  
Sintering Additive ◽  
Hot Pressing Sintering

Due to promising results in literature, SiC-Si3N4 particle composites in the range 0–100 percent SiC were evaluated. Focusing on high-temperature properties, mainly Y2O3 was used as sintering additive. Consolidation occurred primarily by hot-pressing, sintering tests were performed for comparison. Besides short-term properties like strength, toughness etc., long-term properties like creep and oxidation behavior were determined. Results as a function of SiC-content and microstructure were discussed with respect to materials’ performance at high temperatures and possibilities of their production on a technical scale. [S0742-4795(00)00201-5]

scholarly journals High-Temperature Properties of SiC-Si3N4 Particle Composites

1998 ◽  
Author(s):  
Gerhard Woetting ◽  
Bernhard Caspers ◽  
Ernst Gugel ◽  
Ralf Westerheide
Keyword(s):  
High Temperature ◽  
High Temperatures ◽  
Hot Pressing ◽  
Oxidation Behavior ◽  
Short Term ◽  
High Temperature Properties ◽  
Sintering Additive ◽  
Hot Pressing Sintering

Due to promising results in literature, SiC-Si3N4 particle composites in the range 0–100% SiC were evaluated. Focusing on high-temperature properties, mainly Y2O3 was used as sintering additive. Consolidation occurred primarily by hot-pressing, sintering tests were performed for comparison. Besides short-term properties like strength, toughness etc., long-term properties like creep and oxidation behavior were determined. Results as a function of SiC-content and microstructure were discussed with respect to materials’ performance at high temperatures and possibilities of their production on a technical scale.

Long-Term Oxidation Behavior of Various Chromia-Forming Alloys: Effect of Thermal Cycle Length

2009 ◽  
Author(s):  
Vinay P. Deodeshmukh ◽  
S. Krishna Srivastava
Keyword(s):  
Oxidation Kinetics ◽  
Thermal Cycle ◽  
Cycle Length ◽  
Oxidation Behavior ◽  
Metal Loss ◽  
Haynes 230 ◽  
Change Behavior ◽  
High Temperature Alloys ◽  
Number Of Cycles

Thermal cycle length can severely affect long-term oxidation behavior of high-temperature alloys. The present study is focused on the effect of thermal cycle length (twelve 30-day cycles versus six 60-day cycles) on the long-term (360 days) oxidation behavior of various chromia-forming alloys at 982°C, 1092°C, and 1149°C (1800°F, 2000°F, and 2100°F). The alloys included in this study are HAYNES® 230® alloy, 617 alloy, HR-160® alloy, HR-120® alloy, and 800HT® alloy. Alloy performances were assessed by analyzing the weight-change behavior and extent of attack as measured by metal loss and average internal penetration. The 230 and 617 alloys exhibited excellent oxidation resistance under both cycling conditions, presumably due to their ability to form and maintain adherent oxide scale. In particular, alloys with high Fe contents underwent accelerated oxidation attack. There was a significant increase in the extent of attack with increase in number of cycles (i.e. shorter cycle length). Moreover, the effect of cycle length was most pronounced at the highest test temperature (1149°C), and a strong correlation was found between oxidation kinetics and alloy composition as well as oxidation kinetics and the cycle length. HAYNES, 230, HR-160, HR-120 are registered trademarks of Haynes International, Inc. 800HT is a registered trademark of Special Metals Corporation.

scholarly journals Oxidation behavior of 316L austenitic stainless steel in high temperature air with long-term exposure

2020 ◽  
Vol 7 (6) ◽  
pp. 066517
Author(s):  
Xi Huang ◽  
Kai Xiao ◽  
Xiaodong Fang ◽  
Zicheng Xiong ◽  
Lihua Wei ◽  
...  
Keyword(s):  
Stainless Steel ◽  
High Temperature ◽  
Austenitic Stainless Steel ◽  
Oxidation Behavior ◽  
316L Austenitic Stainless Steel

Early-stage oxidation behavior of Co-rich high-temperature alloys

2012 ◽  
Vol 64 (9) ◽  
pp. 772-776 ◽  
Author(s):  
V. P. Deodeshmukh ◽  
S. K. Srivastava ◽  
J. Bai
Keyword(s):  
High Temperature ◽  
Oxidation Behavior ◽  
Early Stage ◽  
High Temperature Alloys

scholarly journals Long-Term Stability and Durability of High-Temperature Alloys

JOM ◽  
2014 ◽  
Vol 66 (12) ◽  
pp. 2476-2477
Author(s):  
Chantal K. Sudbrack ◽  
Mark C. Hardy
Keyword(s):  
High Temperature ◽  
Term Stability ◽  
Long Term Stability ◽  
High Temperature Alloys

Properties of high-temperature alloys in short-term service conditions

1999 ◽  
Vol 41 (4) ◽  
pp. 151-153
Author(s):  
V. V. Medvedev ◽  
B. V. Mochalov ◽  
Yu. B. Sazonov ◽  
L. G. Chernukha ◽  
I. P. Ezhov
Keyword(s):  
High Temperature ◽  
Short Term ◽  
High Temperature Alloys ◽  
Service Conditions

scholarly journals High-temperature short-term and long hardness of sintered compact and porous titanium-siliceous carbide ti3sic2

2004 ◽  
Vol 36 (1) ◽  
pp. 11-20 ◽  
Author(s):  
S.A. Firstov ◽  
E.P. Pechkovsky
Keyword(s):  
High Temperature ◽  
Ternary Compound ◽  
Solid Phase ◽  
Porous Titanium ◽  
Critical Values ◽  
Holding Time ◽  
Short Term ◽  
Sintered Compact ◽  
Temperature Range

The ternary compound of titanium-siliceous carbide Ti3SiC2, one of the representatives of Nan laminates, prepared by solid-phase sintering is investigated in compact and porous (q=0.03-0.41) states. Features of its short-term and long-term hardness (?=10 N) behavior in the temperature range from 20 to 1200?? at a holding time of 1-60 min were studied. It is shown that a temperature of about 700?? and holding time under load of about 10 min are critical values of the indentation procedure that correspond to an intensive decrease of hardness. The presence of porosity results in a decrease in hardness. a deformation scheme of compact and porous titanium-siliceous carbide Ti3SiC2 in the temperature range from 20 to 1200?? is proposed. .

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