Paper Title:
Effects of Annealing on Microstructure and Microhardness of TA15 Titanium Alloy Processed by Equal Channel Angular Pressing
  Abstract

The primary purpose of the present work is to investigate the effects of annealing after equal channel angular pressing (ECAP) on microstructure and microhardness of TA15 titanium alloy. A study was performed by annealing treatment on the microstructure evolution and microhardness variation of ECAPed TA15 alloy. The results state that, static recrystallization occurred distinctly during annealing after ECAP. Since a sample was annealed at a proper temperature and for proper time after ECAP, a larger amount of well globularized and more homogeneous equiaxed α phase has been attained, grains have not grown observably, and the relief of residual stress and work hardening for subsequent processing and using has also been achieved. Accordingly, the optimum annealing parameters of ECAPed TA15 alloy were optimized to be 973 K and 1 hour. The microhardness level of the sample annealed after ECAP was lower than that unannealed, and the microhardness level decreased with the increasing annealing temperature and time.

  Info
Periodical
Materials Science Forum (Volumes 675-677)
Edited by
Yi Tan and Dongying Ju
Pages
735-738
DOI
10.4028/www.scientific.net/MSF.675-677.735
Citation
Y. Zhao, H. Z. Guo, Z. F. Shi, Y. Q. Zhang, Z. K. Yao, L. J. Tan, T. Wang, "Effects of Annealing on Microstructure and Microhardness of TA15 Titanium Alloy Processed by Equal Channel Angular Pressing", Materials Science Forum, Vols. 675-677, pp. 735-738, 2011
Online since
February 2011
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