The Effect of Surface Treatment on The Formation of Surface Layer of FeAl Alloy and Their Properties
Autor: | Ping-Ju Li, 李秉儒 |
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Rok vydání: | 2001 |
Druh dokumentu: | 學位論文 ; thesis |
Popis: | 89 Because the environmental embrittlement of Fe-Al alloy in room temperature, several technique have been derived to avoid embrittlement or reduce its severity. These include hot work and surface modification. The purpose of the research is to evaluate the effects of anodizing, blacking and packing on the formation oxide layer of Fe-Al alloy and their mechanical property at room temperature. The experimental results reveal that the anodizing of Fe-Al could not provide an oxide film. In the test of polarization curve, we find that curve shows passivation of Fe-Al in H3PO4 and NaOH. Blacking process is not suitable for Fe28Al and Fe3Al-Cr, because of the combination between oxide layer and substrate. The oxide layer on Fe18Al is successfully combined, but have poor RT elongation. High temperature surface modification have the excellent RT elongation, even greed the oxide layer. It could be the long time annealing resulted in the softness of Fe-Al. |
Databáze: | Networked Digital Library of Theses & Dissertations |
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