Paper Title:
Effect of Cr Content and Water Vapor on Fracture Behavior of the Scales Formed on Fe and Fe-Cr Alloy
  Abstract

Isothermal oxidation was carried out on Fe and Fe-(1.0 and 5.0mass%)Cr alloy at 800°C and 1000°C in dry (PH2O=1x10-4 atm) and wet (PH2O=0.035 atm) air. Fracture behavior of the scale was investigated using acoustic emission (AE) analysis during cooling. The water vapor content of the atmosphere has a major influence on the oxidation of the Fe-Cr alloys, whereas it has virtually no effect on the oxidation of Fe. During cooling, significant AE activity starts at about 450°C on the Fe and Fe-Cr alloys oxidized in wet air. This critical temperature is independent of sample composition, oxidation temperature and scale thickness. In the case of the oxidation of the Fe-Cr alloys in dry air, however, the critical temperature shifts to higher temperatures with increasing scale thickness and Cr content. Fracture behavior of the scale should be related to scale structure caused by sample composition and oxidation condition.

  Info
Periodical
Materials Science Forum (Volumes 522-523)
Edited by
Shigeji Taniguchi, Toshio Maruyama, Masayuki Yoshiba, Nobuo Otsuka and Yuuzou Kawahara
Pages
497-504
DOI
10.4028/www.scientific.net/MSF.522-523.497
Citation
K. Yanagihara, D. Renusch, M. Röhrig, M. Schütze, "Effect of Cr Content and Water Vapor on Fracture Behavior of the Scales Formed on Fe and Fe-Cr Alloy", Materials Science Forum, Vols. 522-523, pp. 497-504, 2006
Online since
August 2006
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Rabindra Mahapatra, A.W. Davis
Abstract:In this paper we report the oxidation behavior of Rh-xTi (x = 15 & 20 atomic percent) alloys isothermally exposed in air between 1000 and...
721
Authors: X.J. Zhang, Yan Niu
Abstract:Small amounts of silver have been added to the intermetallic compound β-NiAl for the purpose of improving its mechanical properties. Four...
775
Authors: Viorel Aurel Şerban, Cosmin Codrean, Ion Dragoş Uţu
Abstract:The paper makes a review about the opportunity, forming conditions and obtaining methods of bulk amorphous alloys and their properties. There...
37
Authors: Timothy Wong, Z. Yu, K. Suzuki, M.A. Gibson, K. Ishikawa, K. Aoki
Abstract:Nb/NiZr composite alloy membranes have been reported to have hydrogen permeabilities higher than that of pure Pd. Since the hydrogen...
2839
Authors: S.G. Shabestari, R. Gholizadeh
Chapter 2: Forming in Melt or Near Melt Condition
Abstract:Dense precipitation of various intermetallic compounds is a common feature in the microstructure of Al-Si piston alloys. In this...
289