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不同冷速對TC4鈦合金組織和性能的影響
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貴州大學，材料與冶金學院

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貴州省科技廳重大專項(黔科合重大專項字(2014)6013)；貴州省科技廳工業(yè)攻關(guān)項目(黔科合GZ字(2014)3018號)


The effect of cooling rate on microstructure and mechanical properties of TC4 titanium alloy
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1.College of materials and metallurgy,University of Guizhou,Guizhou Guiyang;2.College of materials and metallurgy,University of Guizhou

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    摘要:

    對TC4鈦合金進行了不同冷速的熱處理，得到了不同層次（晶粒、叢域、片層）的顯微組織，建立了以片層組織尺寸為基礎(chǔ)的Hall-Petch關(guān)系。結(jié)果表明：隨著冷卻速率的增加，片層細化，對應(yīng)的屈服強度和抗拉強度逐漸升高，塑性逐漸降低。片層尺寸和力學性能之間較好地吻合Hall-Petch關(guān)系，是影響力學性能的主要特征參量。

    Abstract:

    The different level microstructure (grains,colonies and lamellas)were obtained when TC4 titanium alloy was heat-treated at different cooling rates, and the Hall-Petch relation was established based on different level microstructure. With the increase of cooling rate, the lamellas were refined; the yield strength and tensile strength increased, whereas the ductility gradually decreased.The relationship between lamella size and mechanical properties was in line with Hall-Petch relation, therefore the lamella was the main characteristic parameter affecting the mechanical propertiesand.

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歐梅桂,夏麒帆,宋洪超,梁益龍.不同冷速對TC4鈦合金組織和性能的影響[J].稀有金屬材料與工程,2019,48(2):638~643.[Ou Meigui, Xia Qifan, Song Hongchao, Liang Yilong. The effect of cooling rate on microstructure and mechanical properties of TC4 titanium alloy[J]. Rare Metal Materials and Engineering,2019,48(2):638~643.]
DOI：10.12442/j. issn.1002-185X.20170571

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  • 收稿日期:2017-06-28
  • 最后修改日期:2017-08-23
  • 錄用日期:2017-09-11
  • 在線發(fā)布日期: 2019-03-15
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