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基板材料對(duì)激光熔化沉積制造Ti-48Al-2Cr-2Nb合金組織、織構(gòu)、相和顯微硬度的影響
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沈陽(yáng)工業(yè)大學(xué)材料科學(xué)與工程學(xué)院

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智能化增材制造系統(tǒng)平臺(tái) (2017YFB1103600)


Effect of substrate material on the microstructure, texture, phase and microhardness of a Ti-48Al-2Cr-2Nb alloy processed by laser melting deposition
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School of Materials, Shenyang University of Technology

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Intelligent Additive Manufacturing System Platform (2017YFB1103600)

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    摘要:

    本文研究了基體材料對(duì)激光熔化沉積Ti-48Al-2Cr-2Nb合金顯微組織、織構(gòu)、相組成和硬度的影響。隨著沉積層數(shù)的增加，沉積層的顯微組織由網(wǎng)籃狀結(jié)構(gòu)向等軸狀結(jié)構(gòu)轉(zhuǎn)變，最終演變?yōu)閷訝罱Y(jié)構(gòu)。α2(Ti3Al)相逐漸減少，γ(TiAl)相逐漸增多。不同的TiAl合金層具有不同的顯微硬度。隨著沉積層數(shù)的增加，顯微硬度降低。研究結(jié)果對(duì)于激光沉積制造TiAl合金制備具有可接受的組織、織構(gòu)、相組成和顯微硬度具有參考價(jià)值。

    Abstract:

    Effect of substrate material on the microstructure, texture, phase and hardness of a Ti-48Al-2Cr-2Nb alloy processed by laser melting deposition (LMD) was investigated. With the increase of the number of deposited layers, the microstructure of the deposited layers changes from basket structure to equiaxed structure and finally evolves into lamellar structure, and α2 (Ti3Al) phase decreases and γ (TiAl) phase increases gradually. Different TiAl alloy layers show different microhardness. With the increase of the number of deposited layers, the microhardness decreases. The findings would be a valuable reference for fabricating TiAl components with acceptable microstructure, texture, phase compositions and microhardness by LMD.

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劉占起,馬瑞鑫,王文博,徐國(guó)建,蘇允海.基板材料對(duì)激光熔化沉積制造Ti-48Al-2Cr-2Nb合金組織、織構(gòu)、相和顯微硬度的影響[J].稀有金屬材料與工程,2020,49(7):2262~2268.[Liu Zhanqi, Ma Ruixin, Wang Wenbo, Xu Guojian, Su Yunhai. Effect of substrate material on the microstructure, texture, phase and microhardness of a Ti-48Al-2Cr-2Nb alloy processed by laser melting deposition[J]. Rare Metal Materials and Engineering,2020,49(7):2262~2268.]
DOI：10.12442/j. issn.1002-185X.20190278

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  • 收稿日期:2019-04-01
  • 最后修改日期:2019-05-14
  • 錄用日期:2019-06-14
  • 在線發(fā)布日期: 2020-08-31
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