ISSN:
1573-9066
Quelle:
Springer Online Journal Archives 1860-2000
Thema:
Maschinenbau
Notizen:
Conclusions 1. Physical heterogeneity in SAS-1 alloy was established and studied. 2. It is shown that the single micropores and nest- and band-like micropore colonies found in the alloy have a technological origin and form during the extrusion and sintering of alloy sections. It is only single pores less than 40μ in size that may occasionally be produced also during the machining of alloy specimens, as a result of large silicon grains being pulled out of the specimen surfaces. 3. Macro- and microscopical volumes of the alloy were found to exhibit a heterogeneity of chemical composition. 4. The results of the investigation lead to the conclusion that, by reducing the particle size of alloy powder to be extruded, using narrow particle size fractions, protecting the powder against contamination, and employing degassing during melting, extrusion, and sintering, it should be possible significantly to decrease the physicochemical micro- and macroheterogeneities of SAS-1 alloy and, hence, improve its physicomechanical properties.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1007/BF00791188
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