Effect of sulfur on creep strength of Ni-base single-crystal superalloy, TMS-1700

Yuichiro Joh; Satoshi Utada; Makoto Osawa; Toshiharu Kobayashi; Tadaharu Yokokawa; Kyoko Kawagishi; Shinsuke Suzuki; Hiroshi Harada

doi:10.2320/matertrans.M2016032

Effect of sulfur on creep strength of Ni-base single-crystal superalloy, TMS-1700

Yuichiro Joh, Satoshi Utada^*, Makoto Osawa, Toshiharu Kobayashi, Tadaharu Yokokawa, Kyoko Kawagishi, Shinsuke Suzuki, Hiroshi Harada

^*Corresponding author for this work

School of Fundamental Science and Engineering

Research output: Contribution to journal › Article › peer-review

9 Citations (Scopus)

Abstract

We studied the effect of sulfur addition on a Ni-base single-crystal superalloy, TMS-1700, by performing creep tests at 1100°C/137 M_Pa using specimens doped with 0, 10, 20, and 100 ppm sulfur. The creep rupture life was found to decrease with increasing sulfur concentration. The scanning electron microscopy (SEM) observation of creep-ruptured specimens revealed the coarsening of the raft structure with increasing sulfur concentration. Their transmission electron microscopy (TEM) observation showed the formation of coarser γ/γ′ interfacial dislocation networks with increasing sulfur concentration. These microstructural differences may be the cause of the shorter creep rupture life observed in alloys with higher sulfur addition.

Original language	English
Pages (from-to)	1305-1308
Number of pages	4
Journal	Materials Transactions
Volume	57
Issue number	8
DOIs	https://doi.org/10.2320/matertrans.M2016032
Publication status	Published - 2016

Keywords

Creep strength
Dislocation network
Nickel-base single-crystal superalloy
Sulfur

ASJC Scopus subject areas

Materials Science(all)
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

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title = "Effect of sulfur on creep strength of Ni-base single-crystal superalloy, TMS-1700",

abstract = "We studied the effect of sulfur addition on a Ni-base single-crystal superalloy, TMS-1700, by performing creep tests at 1100°C/137 MPa using specimens doped with 0, 10, 20, and 100 ppm sulfur. The creep rupture life was found to decrease with increasing sulfur concentration. The scanning electron microscopy (SEM) observation of creep-ruptured specimens revealed the coarsening of the raft structure with increasing sulfur concentration. Their transmission electron microscopy (TEM) observation showed the formation of coarser γ/γ′ interfacial dislocation networks with increasing sulfur concentration. These microstructural differences may be the cause of the shorter creep rupture life observed in alloys with higher sulfur addition.",

keywords = "Creep strength, Dislocation network, Nickel-base single-crystal superalloy, Sulfur",

author = "Yuichiro Joh and Satoshi Utada and Makoto Osawa and Toshiharu Kobayashi and Tadaharu Yokokawa and Kyoko Kawagishi and Shinsuke Suzuki and Hiroshi Harada",

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doi = "10.2320/matertrans.M2016032",

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volume = "57",

pages = "1305--1308",

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T1 - Effect of sulfur on creep strength of Ni-base single-crystal superalloy, TMS-1700

AU - Joh, Yuichiro

AU - Utada, Satoshi

AU - Osawa, Makoto

AU - Kobayashi, Toshiharu

AU - Yokokawa, Tadaharu

AU - Kawagishi, Kyoko

AU - Suzuki, Shinsuke

AU - Harada, Hiroshi

PY - 2016

Y1 - 2016

N2 - We studied the effect of sulfur addition on a Ni-base single-crystal superalloy, TMS-1700, by performing creep tests at 1100°C/137 MPa using specimens doped with 0, 10, 20, and 100 ppm sulfur. The creep rupture life was found to decrease with increasing sulfur concentration. The scanning electron microscopy (SEM) observation of creep-ruptured specimens revealed the coarsening of the raft structure with increasing sulfur concentration. Their transmission electron microscopy (TEM) observation showed the formation of coarser γ/γ′ interfacial dislocation networks with increasing sulfur concentration. These microstructural differences may be the cause of the shorter creep rupture life observed in alloys with higher sulfur addition.

AB - We studied the effect of sulfur addition on a Ni-base single-crystal superalloy, TMS-1700, by performing creep tests at 1100°C/137 MPa using specimens doped with 0, 10, 20, and 100 ppm sulfur. The creep rupture life was found to decrease with increasing sulfur concentration. The scanning electron microscopy (SEM) observation of creep-ruptured specimens revealed the coarsening of the raft structure with increasing sulfur concentration. Their transmission electron microscopy (TEM) observation showed the formation of coarser γ/γ′ interfacial dislocation networks with increasing sulfur concentration. These microstructural differences may be the cause of the shorter creep rupture life observed in alloys with higher sulfur addition.

KW - Creep strength

KW - Dislocation network

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KW - Sulfur

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Effect of sulfur on creep strength of Ni-base single-crystal superalloy, TMS-1700

Abstract

Keywords

ASJC Scopus subject areas

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