IMPROVEMENT OF ENVIRONMENTAL DEGRADATION RESISTANCE OF FE-AL-BASED ALLOYS BY SURFACE MODIFICATION TREATMENTS

Authors
LEE PY CHIU LH YANG CF CHEN WD KAI W CHU JP
Citation
Py. Lee et al., IMPROVEMENT OF ENVIRONMENTAL DEGRADATION RESISTANCE OF FE-AL-BASED ALLOYS BY SURFACE MODIFICATION TREATMENTS, Materials science & engineering. A, Structural materials: properties, microstructure and processing, 240, 1997, pp. 736-740
Citations number
15
Journal title
Materials science & engineering. A, Structural materials: properties, microstructure and processing → ACNP
ISSN journal
09215093
Volume
240
Year of publication
1997
Pages
736 - 740
Database
ISI
SICI code
0921-5093(1997)240:<736:IOEDRO>2.0.ZU;2-O
Abstract
The influence of surface modifications on the resistance of environmen tal degradation of an Fe-18Al-0.1Nb-2Si alloy was investigated. A vari ety of surface modification techniques including electroplating, elect roless plating, magnetron sputtering, fluidized bed and pack cementati on were applied to the alloy to produce various protective coatings. T he result of electrochemical hydrogen permeation tests showed that the specimens with a Ni-coating by a magnetron sputtering deposition tech nique exhibited the lowest hydrogen permeation rate and that the Cr-co ating layer by various coating techniques had little influence on redu cing the hydrogen permeation rate in the alloy. The room temperature t ensile tests showed that a significant improvement in the tensile duct ility of the alloy can be achieved by forming an aluminum oxide layer on the specimen surface using a pack cementation in alumina powder. (C ) 1997 Elsevier Science S.A.