Effect of ruthenium on compressive creep of Ni-based single-crystal superalloy

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• 作者：Shunsuke Shimabayashi ; Koji Kakehi
• 关键词：Superalloy ; Creep ; Compression test ; Twinning
• 刊名：Scripta Materialia
• 出版年：2010
• 出版时间：November 2010
• 年：2010
• 卷：63
• 期：9
• 页码：909-912
• 全文大小：464 K

文摘

Effects of Ru on the compressive creep of Ni-based single-crystal superalloys were investigated at 750 and 900 °C. The addition of Ru improved the creep strength at 750 °C. It enhanced the dissociation of dislocations in the matrix channels and would inhibit the nucleation of the a1 1 2 dislocation ribbons which shear the matrix and the precipitates; as a result, the mechanical-twin formation was also impeded and creep strength was increased. However, Ru addition did not improve creep strength at 900 °C.