Detection of rhenium-rich particles at grain boundaries in nickel-base superalloy turbine blades

Research output: Contribution to journalArticlepeer-review

Standard

Detection of rhenium-rich particles at grain boundaries in nickel-base superalloy turbine blades. / Kim, KeeHyun; Withey, Paul.

In: MATERIALS TRANSACTIONS, Vol. 57, No. 10, 16.10.2016, p. 1698-1706.

Research output: Contribution to journalArticlepeer-review

Harvard

APA

Vancouver

Author

Bibtex

@article{eb1e2392643e465fa73757674a8761e0,
title = "Detection of rhenium-rich particles at grain boundaries in nickel-base superalloy turbine blades",
abstract = "Ni-base single crystal superalloy turbine blades containing defect grains were investigated by high resolution electron microscopy. Severaldifferent types of defects, such as, stray grains, equiax grains and freckle chains which formed during casting, and recrystallized grains whichformed during subsequent heat treatment, were selected. Regardless of the region of the turbine blade, many particles with large amounts ofrhenium were detected at the boundary of the stray grain and matrix. The Re-rich particles were also detected at the boundary of the matrix andother defect grains, such as, equiax grains and freckle chain grains, and even at a low angle grain boundary. However, the boundary of the recrystallisedgrain and matrix which was formed after solution heat treatment showed just one Re-rich particle. Also, the composition of theseRe-rich particles is different from any topologically close packed phases which have been reported in Ni-base superalloys. The results suggestthat during solidication, the particles are formed from the melt and pushed ahead of each solidication front of the defect grain and the matrix,and piled up at the boundary of the matrix/defect grain",
author = "KeeHyun Kim and Paul Withey",
year = "2016",
month = oct,
day = "16",
doi = "10.2320/matertrans.M2016131",
language = "English",
volume = "57",
pages = "1698--1706",
journal = "MATERIALS TRANSACTIONS",
issn = "1345-9678",
publisher = "Nihon Kinzoku Gakkai",
number = "10",

}

RIS

TY - JOUR

T1 - Detection of rhenium-rich particles at grain boundaries in nickel-base superalloy turbine blades

AU - Kim, KeeHyun

AU - Withey, Paul

PY - 2016/10/16

Y1 - 2016/10/16

N2 - Ni-base single crystal superalloy turbine blades containing defect grains were investigated by high resolution electron microscopy. Severaldifferent types of defects, such as, stray grains, equiax grains and freckle chains which formed during casting, and recrystallized grains whichformed during subsequent heat treatment, were selected. Regardless of the region of the turbine blade, many particles with large amounts ofrhenium were detected at the boundary of the stray grain and matrix. The Re-rich particles were also detected at the boundary of the matrix andother defect grains, such as, equiax grains and freckle chain grains, and even at a low angle grain boundary. However, the boundary of the recrystallisedgrain and matrix which was formed after solution heat treatment showed just one Re-rich particle. Also, the composition of theseRe-rich particles is different from any topologically close packed phases which have been reported in Ni-base superalloys. The results suggestthat during solidication, the particles are formed from the melt and pushed ahead of each solidication front of the defect grain and the matrix,and piled up at the boundary of the matrix/defect grain

AB - Ni-base single crystal superalloy turbine blades containing defect grains were investigated by high resolution electron microscopy. Severaldifferent types of defects, such as, stray grains, equiax grains and freckle chains which formed during casting, and recrystallized grains whichformed during subsequent heat treatment, were selected. Regardless of the region of the turbine blade, many particles with large amounts ofrhenium were detected at the boundary of the stray grain and matrix. The Re-rich particles were also detected at the boundary of the matrix andother defect grains, such as, equiax grains and freckle chain grains, and even at a low angle grain boundary. However, the boundary of the recrystallisedgrain and matrix which was formed after solution heat treatment showed just one Re-rich particle. Also, the composition of theseRe-rich particles is different from any topologically close packed phases which have been reported in Ni-base superalloys. The results suggestthat during solidication, the particles are formed from the melt and pushed ahead of each solidication front of the defect grain and the matrix,and piled up at the boundary of the matrix/defect grain

U2 - 10.2320/matertrans.M2016131

DO - 10.2320/matertrans.M2016131

M3 - Article

VL - 57

SP - 1698

EP - 1706

JO - MATERIALS TRANSACTIONS

JF - MATERIALS TRANSACTIONS

SN - 1345-9678

IS - 10

ER -