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

*この研究の対応する著者

研究成果: Article査読

5 被引用数 (Scopus)

抄録

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.

本文言語English
ページ(範囲)1305-1308
ページ数4
ジャーナルMaterials Transactions
57
8
DOI
出版ステータスPublished - 2016

ASJC Scopus subject areas

  • 材料科学(全般)
  • 凝縮系物理学
  • 材料力学
  • 機械工学

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