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粉末冶金Ti-Mo合金的顯微組織及力學(xué)性能
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北京科技大學(xué)新材料技術(shù)研究院,北京科技大學(xué)新材料技術(shù)研究院,北京科技大學(xué)新材料技術(shù)研究院,北京科技大學(xué)新材料技術(shù)研究院,北京科技大學(xué)新材料技術(shù)研究院

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新金屬材料國家重點(diǎn)實(shí)驗(yàn)室開放基金資助(項(xiàng)目號2012Z-10);國家自然科學(xué)基金資助(項(xiàng)目號51204015)


Microstructure and mechanical properties of PM Ti–Mo alloys
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State Key Laboratory for Advanced Metals and Materials,University of Science and Technology Beijing,State Key Laboratory for Advanced Metals and Materials,University of Science and Technology Beijing,State Key Laboratory for Advanced Metals and Materials,University of Science and Technology Beijing,State Key Laboratory for Advanced Metals and Materials,University of Science and Technology Beijing

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    摘要:

    以元素粉末為原料,采用模壓燒結(jié)技術(shù)制備了Ti-(8~20)Mo合金,并探討了燒結(jié)工藝及Mo含量對合金組織和力學(xué)性能的影響規(guī)律。結(jié)果表明,在1400℃~1500℃范圍內(nèi)可制備出高致密且組織成分均勻的Ti-Mo合金材料。合金燒結(jié)致密化所需最低溫度隨Mo含量升高相應(yīng)提高。當(dāng)Mo含量為8~16%,合金為典型魏氏體組織,Mo含量提高可使合金中β相晶粒尺寸減小,α片層含量降低并逐漸細(xì)化;而Ti-20Mo合金則由單一等軸β相晶粒組成。模壓燒結(jié)Ti-Mo合金力學(xué)性能優(yōu)異,其彈性模量范圍為59~68 GPa;在1450℃燒結(jié)制備的Ti-14Mo合金相對具有最佳的綜合性能,其硬度為35.7HRC,彈性模量為62.2GPa,抗壓強(qiáng)度為2227MPa,壓縮率為29.1%。

    Abstract:

    : Ti-(8~20)Mo alloys from elemental powders were fabricated by powder metallurgy technique. The effects of sintering temperature and Mo content on the microstructure and mechanical properties were studied. The results show that the Ti-Mo alloys with high-density and uniform microstructure can be produce atsintering temperature range of 1400~1500. The lowest densification sinteringStemperatureSgradually increase with the rise of Mo content. Ti-(8~16)Mo alloys shows typical widmanstatten structure, whereas the Ti-20Mo alloy consists of single β grains. TheIn the range of 8%~16%,increasing Mo content can result in the decrease of β grains, and corespondingly the α lamellars become less and thinner.The as-PMed Ti-(8~20)Mo alloys obtained show good mechanical performence, and possess lower elastic modulus of 59~68 GPa.In comparison, the Ti-14Mo alloy sintered at 1450exhibits the superior mechanical properties with hardness of 35.7HRC, compressive strength of 2227 MPa, compression rate of 29.1%, and elastic modulus of 62.2 GPa.

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林迎午,路新,孫博,劉程程,曲選輝.粉末冶金Ti-Mo合金的顯微組織及力學(xué)性能[J].稀有金屬材料與工程,2017,46(5):1387~1392.[Lin Yingwu, Lu Xin, Sun Bo, Liu Chengcheng, Qu Xuanhui. Microstructure and mechanical properties of PM Ti–Mo alloys[J]. Rare Metal Materials and Engineering,2017,46(5):1387~1392.]
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  • 收稿日期:2015-01-21
  • 最后修改日期:2015-07-30
  • 錄用日期:2015-09-07
  • 在線發(fā)布日期: 2017-09-27
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