Ostwald Ripening Process of Coherentβ′ Precipitates during Aging in Fe0.75Ni0.10Al0.15and Fe0.74Ni0.10Al0.15Cr0.01Alloys
2015 ◽
Vol 2015
◽
pp. 1-7
◽
Keyword(s):
The Ostwald ripening process was studied in Fe0.75Ni0.10Al0.15and Fe0.74Ni0.10Al0.15Cr0.01alloys after aging at 750, 850, and 950°C for different times. The microstructural evolution shows a rounded cube morphology (Fe, Ni)Alβ′ precipitates aligned in the ferrite matrix, which changes to elongated plates after prolonged aging. The variation of the equivalent radii of precipitates with time follows the modified Lifshitz-Slyozov-Wagner theory for diffusion-controlled coarsening. Thermo-Calc analysis shows that the chromium content is richer in the matrix than in the precipitates which causes higher hardness and coarsening resistance in the aged Fe0.74Ni0.10Al0.15Cr0.01alloy.
MICROSTRUCTURAL EVOLUTION OF Al-Cu-Mg-Ag ALLOY WITH TRACE Zr ADDITION DURING TWO-STEP HOMOGENIZATION
2009 ◽
Vol 23
(06n07)
◽
pp. 855-862
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2014 ◽
Vol 783-786
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pp. 1617-1622
Keyword(s):
Keyword(s):
1965 ◽
Vol 285
(1402)
◽
pp. 319-338
◽
Keyword(s):
2000 ◽
Vol 31
(3)
◽
pp. 467-485
◽
2005 ◽
Vol 475-479
◽
pp. 1137-1140
Keyword(s):