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原位觀察鎳基高溫合金CMSX-4縮松形成過(guò)程及機(jī)理研究
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中國(guó)科學(xué)院上海硅酸鹽研究所 上海

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基金項(xiàng)目:

上海市重大科技公關(guān)項(xiàng)目19DZ1100703；國(guó)家自然科學(xué)基金NO.51472263； 中科院上硅所提前啟動(dòng)基金Y82ZC8180G；中科院太空制造重點(diǎn)實(shí)驗(yàn)室自主課題SMT-2019-004


In-situ Observation of Shrinkage Formation and Mechanism during Ni-based Superalloy Solidification
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Affiliation:

Shanghai Institute of Ceramics,Chinese Academy of Sciences

Fund Project:

Ministry of Major Science & Technology of Shanghai(No.19DZ1100703)； National Natural Science Foundation of China (No.51472263)；Shanghai institute of ceramics, Chinese academy of sciences launched the fund in advance(No.Y82ZC8180G)； Key laboratory of space manufacturing, Chinese academy of sciences(No.SMT-2019-004)

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    摘要:

    采用共聚焦激光掃描顯微鏡(CLSM)對(duì)鎳基單晶高溫合金CMSX-4的凝固行為進(jìn)行實(shí)時(shí)觀察。并利用掃描電鏡(SEM)和能譜儀(EDS)對(duì)凝固樣品的微觀形貌和元素偏析特性進(jìn)行研究。在合金凝固過(guò)程中觀察到縮松和碳化物的形成?？s松具有有三種形態(tài)：方形縮松,五角星形縮松和角形縮松。并討論了三種縮松的形成機(jī)理,縮松的形成機(jī)制主要與次級(jí)枝晶臂沿不同方向生長(zhǎng)所包圍的封閉區(qū)域的形狀有關(guān)。另外,發(fā)現(xiàn)碳化物由兩種形式組成,即絮狀碳化物和板條狀碳化物。絮狀碳化物中富含Hf元素,而Cr元素被富集在板條狀碳化物。

    Abstract:

    Confocal laser scanning microscope(CLSM) was used to observe the solidification behavior of Nickel-based single crystal superalloy CMSX-4 in real time. SEM and EDS were used to study the micromorphology and element segregation characteristics of the solidified samples. Shrinkage and carbide formation were observed during alloy solidification. There are three types of shrinkages: square shrinkages, pentagonal star shrinkages and angular shrinkages. The formation mechanism of the three shrinkages is disccused, which is mainly related to the shape of the enclosed area surrounded by the secondary dendrite arms growing in different directions. In addition, carbides are found to be composed of two forms, namely flocculent carbide and lath carbide. Hf elements are enriched in flocculent carbides, while Cr elements are enriched in lath carbides.

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引用本文

許桐舟,潘秀紅,張明輝,湯美波,李會(huì)東,劉學(xué)超.原位觀察鎳基高溫合金CMSX-4縮松形成過(guò)程及機(jī)理研究[J].稀有金屬材料與工程,2021,50(4):1113~1117.[Tongzhou Xu, Xiuhong Pan, Minghui Zhang, Meibo Tang, Huidong Li, Xuechao Liu. In-situ Observation of Shrinkage Formation and Mechanism during Ni-based Superalloy Solidification[J]. Rare Metal Materials and Engineering,2021,50(4):1113~1117.]
DOI：10.12442/j. issn.1002-185X.20200598

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  • 收稿日期:2020-08-13
  • 最后修改日期:2020-11-05
  • 錄用日期:2020-11-27
  • 在線發(fā)布日期: 2021-05-08
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