TY - JOUR
T1 - Coarsening of β′ precipitates in an isothermally-aged Fe 75-Ni10-Al15 alloy
AU - Soriano-Vargas, Orlando
AU - Saucedo-Muñoz, Maribel L.
AU - Lopez-Hirata, Victor M.
AU - Paniagua-Mercado, Ana Ma
PY - 2010/3
Y1 - 2010/3
N2 - The coarsening process of the fi precipitates was studied in an isothermally aged Fe75-Ni10-Al15 alloy. The aging treatments at 750, 850, and 920°C caused the precipitation of the β′ phase with the B2 type crystalline structure in a bcc ferritic matrix phase. As the aging progressed, the initial rounded shape changed to cuboids aligned in the (100) directions of the ferritic matrix, and finally to rectangular plates also aligned in the same direction. The coarsening process of the β′ phase was faster as the aging temperature increased. Nevertheless, the highest hardness and slowest overaging process took place during the aging at 920°C. This increase in hardness seems to be associated with the more rapid formation of the cuboid precipitates aligned in the <100> direction of the ferritic matrix.
AB - The coarsening process of the fi precipitates was studied in an isothermally aged Fe75-Ni10-Al15 alloy. The aging treatments at 750, 850, and 920°C caused the precipitation of the β′ phase with the B2 type crystalline structure in a bcc ferritic matrix phase. As the aging progressed, the initial rounded shape changed to cuboids aligned in the (100) directions of the ferritic matrix, and finally to rectangular plates also aligned in the same direction. The coarsening process of the β′ phase was faster as the aging temperature increased. Nevertheless, the highest hardness and slowest overaging process took place during the aging at 920°C. This increase in hardness seems to be associated with the more rapid formation of the cuboid precipitates aligned in the <100> direction of the ferritic matrix.
KW - Coarsening mechanism
KW - Iron-nickel-aluminum alloys
KW - β′ phase precipitation
UR - http://www.scopus.com/inward/record.url?scp=77951561493&partnerID=8YFLogxK
U2 - 10.2320/matertrans.M2009332
DO - 10.2320/matertrans.M2009332
M3 - Artículo
SN - 1345-9678
VL - 51
SP - 442
EP - 446
JO - Materials Transactions
JF - Materials Transactions
IS - 3
ER -