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冷卻速率對多相透氫V-Ti-Ni合金的組織與性能的影響
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常州大學(xué)機械工程學(xué)院,常州大學(xué)機械工程學(xué)院,哈爾濱理工大學(xué)材料科學(xué)與工程學(xué)院

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江蘇省自然科學(xué)基金資助(項目號BK20150268)


Effect of Cooling Rate on Microstructures and Properties in the Multiphase V-Ti-Ni Alloys for Hydrogen Purifying
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School of Mechanical Engineering,Changzhou University,School of Mechanical Engineering,Changzhou University,School of Materials Science and Engineering,Harbin University of Science and Technology

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    摘要:

    本文研究了冷卻速率對多相V55Ti30Ni15合金的顯微組織、硬度和氫滲透性能的影響。V55Ti30Ni15合金顯微組織由V(Ti, Ni)固溶體、NiTi和NiTi2化合物組成。凝固時冷卻速率對合金的組織和性能有很大的影響。合金鑄錠凝固過程中V(Ti,Ni)固溶體的體積分數(shù)隨冷卻速率的增大而減小,二次枝晶臂間距和寬度也呈現(xiàn)出同樣的變化趨勢。合金硬度隨著冷卻速率的升高不斷增大,氫滲透率卻隨之降低。V-Ti-Ni多相合金400℃的氫滲透率與V(Ti, Ni)固溶體體積分數(shù)成線性關(guān)系。合金鑄錠氫滲透率不僅與V(Ti, Ni)固溶體的相對含量有關(guān),而且與固溶體中Ti、Ni合金元素含量和相界的體積有關(guān)。

    Abstract:

    Effect of cooling rete on microstructures, hardness and hydrogen permeation properties of V55Ti30Ni15 alloys were investigated in present study. The results indicate that the microstructures of the alloy consist of the V(Ti, Ni) solid solution and the NiTi and NiTi2 compounds. The cooling rate has significant effects on the microstructures and properties of V55Ti30Ni15 alloys. The volume fraction of V(Ti, Ni) solid solution and second dendrite arm width and spacing decrease with increasing in cooling rate. The hardness value increases with increasing cooling rate, but hydrogen permeability decreases. The hydrogen permeability of V55Ti30Ni15 alloy is linear relationship with the volume fraction of V(Ti, Ni) solid solution. The hydrogen permeability is not only relate to the volume fraction of V(Ti, Ni) solid solution but also the content of Ti and Ni and the volume of phase boundaries in V55Ti30Ni15 alloy.

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江鵬,袁同心,于彥東.冷卻速率對多相透氫V-Ti-Ni合金的組織與性能的影響[J].稀有金屬材料與工程,2018,47(6):1872~1877.[Jiang Peng, Yuan Yongxin, Y u Yandong. Effect of Cooling Rate on Microstructures and Properties in the Multiphase V-Ti-Ni Alloys for Hydrogen Purifying[J]. Rare Metal Materials and Engineering,2018,47(6):1872~1877.]
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  • 收稿日期:2016-05-24
  • 最后修改日期:2016-07-03
  • 錄用日期:2016-07-15
  • 在線發(fā)布日期: 2018-09-06
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