TY - JOUR
T1 - Coarsening kinetics of coherent NiAl-type precipitates in FeNiAl and FeNiAlMo alloys
AU - Calderon, H.
AU - Fine, M. E.
N1 - Funding Information:
One of the authors (H.C.) wishes to acknowledge financial support from the Govern- ment of Mexico through a Consejo Nacional de Ciencia y Tecnologia fellowship. Partial support for this study was derived from the Materials Research Center of Northwestern University under National Science Foundation-Materials Research Laboratory Grant DMR79-23573 and is gratefully acknowledged. Thanks are also due to Inland Steel Company for the provision of the alloys studied.
PY - 1984
Y1 - 1984
N2 - The coarsening rates of NiAl(β′) precipitates in ferritic FeNiAl and FeNiAlMo alloys were measured at 700°C in order to determine the interfacial energy σ. The Lifshitz-Slyozou-Wagner theory and the Brailsford-Wynblatt modification are used to analyze the ripening kinetics. When volume fraction effects are considered, the interfacial energy between the α matrix and the β′ precipitate was determined as 2 × 10-2 J m-2 in both alloys. X-ray diffraction results show that molybdenum increases the lattice parameter mismatch δ between the matrix and the precipitate to 0.81%. On the basis of the rather small variation in the interfacial energy σ, it is suggested that an increase in the coherency strains does not substantially alter σ as long as the precipitates remain coherent.
AB - The coarsening rates of NiAl(β′) precipitates in ferritic FeNiAl and FeNiAlMo alloys were measured at 700°C in order to determine the interfacial energy σ. The Lifshitz-Slyozou-Wagner theory and the Brailsford-Wynblatt modification are used to analyze the ripening kinetics. When volume fraction effects are considered, the interfacial energy between the α matrix and the β′ precipitate was determined as 2 × 10-2 J m-2 in both alloys. X-ray diffraction results show that molybdenum increases the lattice parameter mismatch δ between the matrix and the precipitate to 0.81%. On the basis of the rather small variation in the interfacial energy σ, it is suggested that an increase in the coherency strains does not substantially alter σ as long as the precipitates remain coherent.
UR - http://www.scopus.com/inward/record.url?scp=0005975814&partnerID=8YFLogxK
U2 - 10.1016/0025-5416(84)90121-6
DO - 10.1016/0025-5416(84)90121-6
M3 - Artículo
SN - 0025-5416
VL - 63
SP - 197
EP - 208
JO - Materials Science and Engineering
JF - Materials Science and Engineering
IS - 2
ER -