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TC18鈦合金在熱變形過(guò)程中的組織不均勻現(xiàn)象
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臺(tái)州學(xué)院機(jī)械工程學(xué)院,上海交通大學(xué)金屬基復(fù)合材料國(guó)家重點(diǎn)實(shí)驗(yàn)室

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浙江省教育廳科研項(xiàng)目 (No. Y201533396)


Microstructure Heterogeneity of TC18 Ti Alloy during Hot Deformation
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TaiZhou University,State key laboratory of Metal Matrix Composites,Shanghai Jiao Tong University

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    摘要:

    Ti-5Al-5Mo-5V-1Fe-1Cr鈦合金是一種重要的航空材料，本文揭示了該合金在等溫壓縮過(guò)程中出現(xiàn)的組織不均勻現(xiàn)象。首先使用真空自耗爐制備出合金鑄錠，而后進(jìn)行熱加工和熱處理，使用熱處理后的材料車(chē)削成圓柱形試樣進(jìn)行等溫壓縮試驗(yàn)，試樣端面沒(méi)有進(jìn)行打磨、拋光處理，結(jié)果出現(xiàn)了嚴(yán)重的組織不均勻，在試樣內(nèi)部發(fā)現(xiàn)了軸對(duì)稱分布的局部大變形區(qū)，這將增加材料受力時(shí)起裂的幾率。本文就該組織現(xiàn)象展開(kāi)了研究。

    Abstract:

    Ti-5Al-5Mo-5V-1Fe-1Cr Ti alloy is an important aviation material. The microstructure heterogeneity of the alloy during isothermal compression is revealed in this work. The alloy is fabricated via the consumable vacuum arc-remelting furnace. The as-cast ingot is subjected to thermo-mechanical processing and heat treatment. Isothermal compression tests are conducted subsequently. The cylindrical specimens are machined from the heat-treated rods. The two ends of the specimens are not rubbed and polished. The local large deformation zones are observed in the specimens undergoing isothermal compression, which can cause crack nucleation in the material when the material bears load. The microstructural phenomenon is investigated in this work.

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孫曙宇,呂維潔. TC18鈦合金在熱變形過(guò)程中的組織不均勻現(xiàn)象[J].稀有金屬材料與工程,2016,45(6):1545~1548.[Sun Shuyu, Lu Weijie. Microstructure Heterogeneity of TC18 Ti Alloy during Hot Deformation[J]. Rare Metal Materials and Engineering,2016,45(6):1545~1548.]
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  • 收稿日期:2015-01-11
  • 最后修改日期:2015-12-25
  • 錄用日期:2016-01-14
  • 在線發(fā)布日期: 2016-10-08
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