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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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    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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[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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History
  • Received:June 28,2017
  • Revised:August 23,2017
  • Adopted:September 11,2017
  • Online: March 15,2019
  • Published: