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Study on the Semi-equiaxed Structure and Tensile Properties of TA19 Titanium Alloy
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1.School of Materials and Metallurgy,Guizhou University;2.Guizhou Key Laboratory for Mechanical Behavior and Microstructure of Materials

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TG146.2+3

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    Abstract:

    By heating up the Tβ temperature and then holding 25-90s, the semi- equiaxed structure, which is a transition structure between the equiaxed structure and the lamellar structure,is shaped. The influence of the change of heat holding time on the semi-equiaxed structure evolution law and mechanical properties is studied. Experimental results indicate that the formation of the semi-equiaxed structure is mainly because the element Mo into the β matrix diffused inhomogeneous into primary equiaxed α phase when specimens was kept above the Tβ temperature for a short time,And in the cooling process,the β transformain structure grow through the primary equiaxed α phase.With the prolongation of holding time,the semi-equiaxed structure are gradually replaced by lameller structure.When heated to 1015℃,hold 45s,the tensile strength is 1219MPa,the reduction of area is 29%,and the elongation is 14%,which has a better strength and plasticity.

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[Mo-liu Han, Ping-wei Xu, Ming-pan Wan, Yi-long Liang, Jiang-ping Du, Yu Liang. Study on the Semi-equiaxed Structure and Tensile Properties of TA19 Titanium Alloy[J]. Rare Metal Materials and Engineering,2018,47(12):3768~3775.]
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History
  • Received:March 08,2018
  • Revised:March 26,2018
  • Adopted:April 04,2018
  • Online: January 04,2019
  • Published: