Analysis of precipitation in Fe-rich Fe-Ni-Al alloys by diffusion couples

Edgar Contreras-Piedras; Héctor J. Dorantes-Rosales; Víctor M. López-Hirata; Felipe Hernández Santiago; Jorge L. González-Velázquez; Francisco I. López-Monrroy

doi:10.1016/j.msea.2012.08.013

Analysis of precipitation in Fe-rich Fe-Ni-Al alloys by diffusion couples

Edgar Contreras-Piedras, Héctor J. Dorantes-Rosales, Víctor M. López-Hirata, Felipe Hernández Santiago, Jorge L. González-Velázquez, Francisco I. López-Monrroy

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Abstract

The precipitation process of the Β' phase was studied in Fe-rich Fe-Ni-Al alloys using a Fe-25. at%Ni-25. at%Al alloy and pure Fe diffusion couple. The formed concentration gradient allowed to study the aging process at 900 °C in Fe-Ni-Al alloys with Al and Ni contents up to about 23. at%. The morphology of precipitates was rounded cuboids and it changed to elongated plates as the aging progressed the precipitate coarsening kinetics followed the modified LSW theories. The precipitate coarsening resistance decrease with the increase in the volume fraction of precipitates. In order to evaluate the effect of the precipitation process on the mechanical properties of the alloy tested, micro Vickers hardness was measured, showing an increase of hardness on the Al and Ni content increased.

Original language	English
Pages (from-to)	366-370
Number of pages	5
Journal	Materials Science and Engineering A
Volume	558
DOIs	https://doi.org/10.1016/j.msea.2012.08.013
State	Published - 15 Dec 2012

Keywords

Diffusion couples
Fe-rich Fe-Ni-Al alloys
Β' precipitation

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10.1016/j.msea.2012.08.013

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@article{0226216014c449f79fd9d4c300785cc8,

title = "Analysis of precipitation in Fe-rich Fe-Ni-Al alloys by diffusion couples",

abstract = "The precipitation process of the Β' phase was studied in Fe-rich Fe-Ni-Al alloys using a Fe-25. at%Ni-25. at%Al alloy and pure Fe diffusion couple. The formed concentration gradient allowed to study the aging process at 900 °C in Fe-Ni-Al alloys with Al and Ni contents up to about 23. at%. The morphology of precipitates was rounded cuboids and it changed to elongated plates as the aging progressed the precipitate coarsening kinetics followed the modified LSW theories. The precipitate coarsening resistance decrease with the increase in the volume fraction of precipitates. In order to evaluate the effect of the precipitation process on the mechanical properties of the alloy tested, micro Vickers hardness was measured, showing an increase of hardness on the Al and Ni content increased.",

keywords = "Diffusion couples, Fe-rich Fe-Ni-Al alloys, Β' precipitation",

author = "Edgar Contreras-Piedras and Dorantes-Rosales, {H{\'e}ctor J.} and L{\'o}pez-Hirata, {V{\'i}ctor M.} and {Hern{\'a}ndez Santiago}, Felipe and Gonz{\'a}lez-Vel{\'a}zquez, {Jorge L.} and L{\'o}pez-Monrroy, {Francisco I.}",

note = "Funding Information: The authors wish to acknowledge financial support from Conacyt, SIP–PIFI–IPN .",

year = "2012",

month = dec,

day = "15",

doi = "10.1016/j.msea.2012.08.013",

language = "Ingl{\'e}s",

volume = "558",

pages = "366--370",

journal = "Materials Science and Engineering A",

issn = "0921-5093",

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TY - JOUR

T1 - Analysis of precipitation in Fe-rich Fe-Ni-Al alloys by diffusion couples

AU - Contreras-Piedras, Edgar

AU - Dorantes-Rosales, Héctor J.

AU - López-Hirata, Víctor M.

AU - Hernández Santiago, Felipe

AU - González-Velázquez, Jorge L.

AU - López-Monrroy, Francisco I.

N1 - Funding Information: The authors wish to acknowledge financial support from Conacyt, SIP–PIFI–IPN .

PY - 2012/12/15

Y1 - 2012/12/15

N2 - The precipitation process of the Β' phase was studied in Fe-rich Fe-Ni-Al alloys using a Fe-25. at%Ni-25. at%Al alloy and pure Fe diffusion couple. The formed concentration gradient allowed to study the aging process at 900 °C in Fe-Ni-Al alloys with Al and Ni contents up to about 23. at%. The morphology of precipitates was rounded cuboids and it changed to elongated plates as the aging progressed the precipitate coarsening kinetics followed the modified LSW theories. The precipitate coarsening resistance decrease with the increase in the volume fraction of precipitates. In order to evaluate the effect of the precipitation process on the mechanical properties of the alloy tested, micro Vickers hardness was measured, showing an increase of hardness on the Al and Ni content increased.

AB - The precipitation process of the Β' phase was studied in Fe-rich Fe-Ni-Al alloys using a Fe-25. at%Ni-25. at%Al alloy and pure Fe diffusion couple. The formed concentration gradient allowed to study the aging process at 900 °C in Fe-Ni-Al alloys with Al and Ni contents up to about 23. at%. The morphology of precipitates was rounded cuboids and it changed to elongated plates as the aging progressed the precipitate coarsening kinetics followed the modified LSW theories. The precipitate coarsening resistance decrease with the increase in the volume fraction of precipitates. In order to evaluate the effect of the precipitation process on the mechanical properties of the alloy tested, micro Vickers hardness was measured, showing an increase of hardness on the Al and Ni content increased.

KW - Diffusion couples

KW - Fe-rich Fe-Ni-Al alloys

KW - Β' precipitation

UR - http://www.scopus.com/inward/record.url?scp=84866276137&partnerID=8YFLogxK

U2 - 10.1016/j.msea.2012.08.013

DO - 10.1016/j.msea.2012.08.013

M3 - Artículo

SN - 0921-5093

VL - 558

SP - 366

EP - 370

JO - Materials Science and Engineering A

JF - Materials Science and Engineering A

ER -

Analysis of precipitation in Fe-rich Fe-Ni-Al alloys by diffusion couples

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Keywords

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