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Ru對(duì)一種第四代單晶高溫合金γ/γ′相中元素分布及高溫蠕變性能的影響
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北京航空材料研究院,北京航空材料研究院,北京航空材料研究院,中國(guó)科學(xué)院物理研究所;中國(guó)科學(xué)院物理研究所,北京航空材料研究院,北京航空材料研究院

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國(guó)家自然科學(xué)基金資助項(xiàng)目(59493300);教育部博士點(diǎn)基金資助項(xiàng)目(9800462)


Effect of Ru on Partitioning of Elements in γ/γ′ Phase and High Temperature Creep Properties of a Fourth Ni-based Single Crystal Superalloy
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Science and Technology on Advanced High Temperature Structural Materials Laboratory,Beijing Institute of Aeronautical Materials,Science and Technology on Advanced High Temperature Structural Materials Laboratory,Beijing Institute of Aeronautical Materials,Science and Technology on Advanced High Temperature Structural Materials Laboratory,Beijing Institute of Aeronautical Materials,Beijing National Laboratory for Condensed Matter Physics,Institute of Physics,Chinese Academy of Sciences,Science and Technology on Advanced High Temperature Structural Materials Laboratory,Beijing Institute of Aeronautical Materials,Science and Technology on Advanced High Temperature Structural Materials Laboratory,Beijing Institute of Aeronautical Materials

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    摘要:

    摘 要: 研究了不同Ru含量（0和2wt.%）的高Re鎳基單晶高溫合金在1120 ℃/140 MPa條件下的蠕變性能，采用SEM、STEM/TEM以及EDS等方法分析了Ru對(duì)合金γ/γ′相組織、合金元素成分分配比、蠕變變形組織和位錯(cuò)形態(tài)的影響。結(jié)果表明，與無(wú)Ru合金相比，含Ru合金γ′尺寸更為細(xì)小，γ相通道更窄，γ/γ′兩相中對(duì)TCP相析出有重要影響的Re、Mo和Cr元素分配更加均勻。Ru通過(guò)降低γ′相和γ相通道尺寸，降低γ/γ′界面平均位錯(cuò)間距，抑制蠕變加載過(guò)程中TCP相析出，顯著提高合金的高溫蠕變性能。本文研究結(jié)果對(duì)認(rèn)識(shí)單晶合金高溫蠕變過(guò)程中Ru的強(qiáng)化機(jī)理方面具有理論指導(dǎo)意義。

    Abstract:

    Abstract: The influence of Ru element on the creep properties under 1120 ℃/140 MPa of high Re Ni-based single crystal superalloys with two levels of Ru (0, 2wt.%) additions was investigated. The γ/γ′ phase, partitioning ratio of alloying elements, deformation microstructures and the morphology of dislocations were studied by SEM, STEM/TEM and EDS. The results indicate that Ru addition results in decreasing the size of γ′ phase, width of γ channel and elemental partitioning ratio of Re，Mo and Cr which are important for the precipitation of TCP phase. Ru addition decreased the size of γ′ phase and width of γ channel, decreased the spacing of γ/γ′ interfacial dislocation networks and inhibited the precipitation of TCP phase in the process of creep loading, finally improving the creep properties of the investigatived alloy significantly. This study would be helpful for the understanding of ruthenium’s role of strengthening mechanism in high temperature creep of Ni-base single crystal superalloys. Key words: single crystal superalloys; Ru; micrstructures; partitioning of elements in γ/γ′ phase; creep properties

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駱宇時(shí),趙云松,楊帥,葛炳輝,張劍,唐定中. Ru對(duì)一種第四代單晶高溫合金γ/γ′相中元素分布及高溫蠕變性能的影響[J].稀有金屬材料與工程,2016,45(7):1719~1725.[LUO Yu-shi, ZHAO Yun-song, YANG Shuai, Ge Bing-hui, ZHANG Jian, TANG Ding-zhong. Effect of Ru on Partitioning of Elements in γ/γ′ Phase and High Temperature Creep Properties of a Fourth Ni-based Single Crystal Superalloy[J]. Rare Metal Materials and Engineering,2016,45(7):1719~1725.]
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  • 收稿日期:2016-03-22
  • 最后修改日期:2016-04-29
  • 錄用日期:2016-06-29
  • 在線(xiàn)發(fā)布日期: 2016-10-09
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