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高Nb-TiAl合金定向凝固研究現(xiàn)狀及展望
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西北工業(yè)大學(xué),哈爾濱工業(yè)大學(xué),哈爾濱工業(yè)大學(xué),西北工業(yè)大學(xué)，哈爾濱工業(yè)大學(xué)

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國(guó)家重點(diǎn)基礎(chǔ)研究發(fā)展計(jì)劃項(xiàng)目（2011CB605504）、新世紀(jì)優(yōu)秀人才（NCET-12-0153) 和國(guó)家自然科學(xué)基金(51274076)


Research Progess and Prospect of High Nb Containing TiAl Alloys Directional Solidification
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Northwesten Polytechnical University,Harbin Institute of Technology,Harbin Institute of Technology,Northwesten Polytechnical University，Harbin Institute of Technology

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    摘要:

    高Nb-TiAl合金具有高比強(qiáng)和優(yōu)異的高溫性能，是TiAl合金向800 ℃以上發(fā)展的重要方向，其定向組織合金作為葉片材料在高推重比發(fā)動(dòng)機(jī)中具有巨大的應(yīng)用潛力。以傳統(tǒng)TiAl合金定向凝固為背景論述了高Nb-TiAl合金定向凝固的研究現(xiàn)狀，首先介紹了定向凝固方法和模殼材料發(fā)展，然后對(duì)高Nb-TiAl合金定向凝固宏觀組織、界面形態(tài)和片層特征控制進(jìn)行了評(píng)述，接著簡(jiǎn)要闡述了冷坩堝定向凝固制備高Nb-TiAl合金的相關(guān)工作，進(jìn)一步對(duì)定向組織高Nb-TiAl合金的力學(xué)性能進(jìn)行了分析。最后，展望了高Nb-TiAl合金定向凝固的發(fā)展方向。

    Abstract:

    High Nb containing TiAl alloys possess high specific strength and excellent performance at evaluated temperature, which is the significant development of TiAl intermetallics for applying up to 800 ℃. The directionalloy solidified high Nb-TiAl alloys have huge potential on the blade materials in the next generation aviation engine with a high thrust-weight ratio. Based on the directional solidification (DS) of conventional TiAl alloys, the current status of DS high Nb-TiAl alloys was discussed in this paper. Firstly, the DS methods and mould materials for directionally solidifying high Nb-TiAl alloys were introduced. Then the macrosturcture, the interface morphology and the α2/γ lamella of directionally solidified high Nb-TiAl alloys were elaborated respectively. Further, the cold crucible directional solidification of high Nb-TiAl alloys was presented and the mechanical properties of TiAl alloys were analyzed. Last, the prospect of of DS high Nb-TiAl alloys was outlooked.

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楊劼人,陳瑞潤(rùn),郭景杰,傅恒志.高Nb-TiAl合金定向凝固研究現(xiàn)狀及展望[J].稀有金屬材料與工程,2016,45(5):1357~1363.[Yang Jie-ren, chen ruirun, Guo Jing-jie, Fu heng-zhi. Research Progess and Prospect of High Nb Containing TiAl Alloys Directional Solidification[J]. Rare Metal Materials and Engineering,2016,45(5):1357~1363.]
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  • 收稿日期:2014-04-29
  • 最后修改日期:2014-05-22
  • 錄用日期:2014-06-04
  • 在線發(fā)布日期: 2016-06-02
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