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The effect of iron on the precipitation in an Al-Mg-Si alloy

✍ Scribed by Dr. U. Schmidt; M. Joachimi; L. Petzold; Dr. F. Eichhorn


Publisher
John Wiley and Sons
Year
1984
Tongue
English
Weight
523 KB
Volume
19
Category
Article
ISSN
0232-1300

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✦ Synopsis


The effect of iron on the precipitation of a technical Al-Mg-Si alloy was studied by macroand microhardness, Y-modulus and SANS with D K D and was coinpared with a pure alloy. The iron phases of the technical alloy were preferentially considered by the SANS. I n addition the daniping by the elastomat of FORSTER and the variance of the microhardness were measured. It was found t h a t iron essentially influences the kinetics o f the precipitate, particularly the mechanism of nucleation and precipitation sequence. Der EinfluB von Eisen auf die Ausscheidungsltinetik einer technischen AlMgSi-Legierung wird durch Vergleich mit einer reinen AlMgSi-Legierung untersucht. Als MelJverfahren komirien Makro-und Mikroharte, Y-Modul und Neutronenkleinwinkelstreuung mit einem D K D zur Anwendung. Die NKWS spricht bevorzugt auf d.ie Eisenphasen in der technischen Legierung an. Zusatzlich wurde die Danipfung am FORSTER-Elastomaten und fur die Mikrohartemessungen das Streuquadrat ausgewertet. Es konnte nachgewiesen werden, dal.3 Eisen den Ausscheidungsmechanismus in der AlMgSi-Legierung wesentlich beeinflulJt, insbesondere den Keimbildnngsmechanisrnus und der Sequenzfolge.


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