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Home > Archive>Volume 49, Issue 10, 2020 >3294-3300. DOI:10.12442/j.issn.1002-185X.20200119
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Effect of Heating Rate on Formability of Ti6Al4V Alloy Micro-gear under an Electric Field
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National Nature Science Foundation of China (no.51705348), Sichuan science and technology program (no.2019YFG0359) and the Research Funds for the Central University (no.2019SCUH0013)

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    Abstract:

    In this paper, a novel micro plastic forming technology is introduced for the forming of micro-gear using the high strength, toughness, and hard-to-deform Ti6Al4V alloy material. The experimental results showed that the Ti6Al4V alloy micro-gear can be achieved successfully from a cylindrical Ti6Al4V billet with a set of graphite die under an electric field. The Ti6Al4V material exhibits the best formability when the heating rate is 5 ℃/s, however, higher heating rate 30 ℃/s and 40 ℃/s can effectively shorten the time for pre-heating the material for deformation. The microstructure in all the formed samples have the Widmanst?tten structure. but gear center in contradiction to tooth top which exhibit a finer microstructure, and the β phase content of specimens with the heating rates of 5 ℃/s and 10 ℃/s are slightly higher than the original billet but specimens involving in heating rates 20 ℃/s, 30 ℃/s, and 40 ℃/s show nothing of the β phase from XRD analysis. Moreover, Vickers hardness of all formed samples increase than that of the original billet after an electric field, and which is independent on the heating rates.

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[yanxiangzhong, danlei, yangyi, tianyankang, huangkunlan. Effect of Heating Rate on Formability of Ti6Al4V Alloy Micro-gear under an Electric Field[J]. Rare Metal Materials and Engineering,2020,49(10):3294~3300.]
DOI：10.12442/j. issn.1002-185X.20200119

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History
  • Received:February 24,2020
  • Revised:March 28,2020
  • Adopted:April 02,2020
  • Online: November 04,2020

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