Menu
Search
Filters
Close
Menu

01154 CHROMIUM DEPLETION IN HIGH TEMPERATURE ALLOYS DURING ELEVATED TEMPERATURE EXPOSURE

Picture for 01154 CHROMIUM DEPLETION IN HIGH TEMPERATURE
Available for download
Product Number: 51300-01154-SG
ISBN: 01154 2001 CP
Author: Mark A. Harper and Larry R. Walker
$0.00
$20.00
$20.00
Alloys typically rely on the formation of an external scale for protection against high temperature aggressive environments. Furthermore, metallic components requiring an appreciable service life (e.g. thousands of hours) in an oxidizing atmosphere at operating temperatures above approximately 700°C, typically contain sufficient additions of Cr, AI, and/or Si such that a protective Cr2O3, Al2O3, and/or SiO2 scale forms on the component during operation. The vast majority of high temperature alloys are Cr2O3 formers which requires the diffusion of Cr to the alloy/scale interface to support the continued growth of the scale. The subsequent depletion of Cr in the alloy can be measured with various types of analytical equipment (e.g. an electron microprobe) and plotted as a function of distance from the alloy/scale interface; thereby producing a concentration profile. In this work, the depletion of Cr was studied in six different high temperature alloys after exposure to laboratory air at 1050°C for 30 days (720 hours). The concentration profiles were determined and used to calculate an average effective interdiffusion coefficient for Cr in each alloy. The characteristics of these profiles and the corresponding diffusion parameters are discussed in terms of alloy composition and oxidation kinetics.
Alloys typically rely on the formation of an external scale for protection against high temperature aggressive environments. Furthermore, metallic components requiring an appreciable service life (e.g. thousands of hours) in an oxidizing atmosphere at operating temperatures above approximately 700°C, typically contain sufficient additions of Cr, AI, and/or Si such that a protective Cr2O3, Al2O3, and/or SiO2 scale forms on the component during operation. The vast majority of high temperature alloys are Cr2O3 formers which requires the diffusion of Cr to the alloy/scale interface to support the continued growth of the scale. The subsequent depletion of Cr in the alloy can be measured with various types of analytical equipment (e.g. an electron microprobe) and plotted as a function of distance from the alloy/scale interface; thereby producing a concentration profile. In this work, the depletion of Cr was studied in six different high temperature alloys after exposure to laboratory air at 1050°C for 30 days (720 hours). The concentration profiles were determined and used to calculate an average effective interdiffusion coefficient for Cr in each alloy. The characteristics of these profiles and the corresponding diffusion parameters are discussed in terms of alloy composition and oxidation kinetics.
PRICE BREAKS - The more you buy, the more you save
Quantity
1+
5+
Price
$20.00
$20.00
Product tags
Also Purchased
Picture for 00527 MATERIALS PERFORMANCE IN HIGH-TEMPERATURE
Available for download

00527 MATERIALS PERFORMANCE IN HIGH-TEMPERATURE ENVIRONMENTS - MAKING THE CHOICE

Product Number: 51300-00527-SG
ISBN: 00527 2000 CP
Author: Peter Elliott
$20.00
Picture for 97132 LONG-TERM OXIDATION BEHAVIOR OF
Available for download

97132 LONG-TERM OXIDATION BEHAVIOR OF SELECTED HIGH TEMPERATURE ALLOYS

Product Number: 51300-97132-SG
ISBN: 97132 1997 CP
Author: M. A. Harper, J. E. Barnes, G. Y. Lai
$20.00
Picture for 00512 HIGH TEMPERATURE AGING CHARACTERISTICS
Available for download

00512 HIGH TEMPERATURE AGING CHARACTERISTICS OF 20Cr32Ni1Nb CASTINGS

Product Number: 51300-00512-SG
ISBN: 00512 2000 CP
Author: J. J. Hoffman
$20.00
Categories
Industry
Recently viewed
Popular tags
View all

Association for Materials Protection and Performance

© AMPP All Rights Reserved.
Membership Terms of Content Use
Contact Customer Support