Coarsening of precipitates and dispersoids in aluminium alloy matrices : a consolidation of the available experimental data
Experimental data on the coarsening of precipitates and dispersoids in Al-based matrices are reviewed. Available data are tabulated as K = r exp 3 -r exp 3 sub 0 )/t where r sub 0 is the initial particle radius and r is its value after time t at a temperature T, and then plotted as log (KT) against...
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Published in | Journal of materials science Vol. 29; no. 7; pp. 1895 - 1900 |
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Main Authors | , , , |
Format | Journal Article |
Language | English |
Published |
Heidelberg
Springer
01.04.1994
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Subjects | |
Online Access | Get full text |
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Summary: | Experimental data on the coarsening of precipitates and dispersoids in Al-based matrices are reviewed. Available data are tabulated as K = r exp 3 -r exp 3 sub 0 )/t where r sub 0 is the initial particle radius and r is its value after time t at a temperature T, and then plotted as log (KT) against 1/T for consolidation and assessment. Available data for coarsening of L1 sub 2 -Al sub 3 (Zr,V) and related phases in zirconium-containing alloys and of Al sub 12 Fe sub 3 Si and related phases in Al-Fe based alloys indicate (i) rates of coarsening at 375-475 deg C (0.7-0.8T sub m ) five to eight orders of magnitude less than would be expected for delta ', theta ' and theta '' in this temperature range, and (ii) high activation energies of approx 300 and 180 kJ/mol, respectively. |
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Bibliography: | ObjectType-Article-2 SourceType-Scholarly Journals-1 ObjectType-Feature-1 content type line 23 |
ISSN: | 0022-2461 1573-4803 |
DOI: | 10.1007/BF00351310 |