+Advanced Search
Hot deformation behavior of near α titanium alloy Ti-1100 prepared by TiH2-based powder metallurgy
Author:
Affiliation:

1.Department of Vanadium and Titanium,Panzhihua University;2.Department of Materials Science and Engineering,Xihua Universersity

Clc Number:

Fund Project:

Panzhihua science and technology program, 2018CY-G-3,

  • Article
  • |
  • Figures
  • |
  • Metrics
  • |
  • Reference
  • |
  • Related
  • |
  • Cited by
  • |
  • Materials
  • |
  • Comments
    Abstract:

    Hot deformation behavior of TiH2-based PM near α titanium alloy Ti-1100 alloys has been investigated at temperature range of 973–1173K and strain rate range of 0.01–1.0s-1 by hot compression tests. The Arrhenius constitutive equation was developed and the hot deformation activation energy was calculated to be 334.76 kJ/mol. The temperature sensitivities (θ) were calculated by a modified function and the strain rate sensitivities (m) were determined. Based on the results of temperature sensitivity and strain rate sensitivity together with microstucture at strain rate of 0.5, the hot working condition was analyzed. It was found that the instability regions is mostly appeared at strain rate of 0.01s-1 and 1s-1 over whole temperature range, while the optimal hot working conditions are obtained in the range of 1135K 0.29s-1 to 1173K 0.76s-1, and 1040 0.33 s-1 to 1096K 0.6s-1. Besides, the microstucture analysis reveals that the dynamic recrystallization (DRX) occurs at strain rate of 0.01–0.1s-1, while the formation of micro-voids is the dominant mechanism of flow softening at strain rate of 1s-1.

    Reference
    Related
    Cited by
Get Citation

[Rongxun Piao, Shaoli Yang, Yuling Zhu, Lan Ma. Hot deformation behavior of near α titanium alloy Ti-1100 prepared by TiH2-based powder metallurgy[J]. Rare Metal Materials and Engineering,2020,49(10):3314~3324.]
DOI:10.12442/j. issn.1002-185X. E20200010

Copy
Article Metrics
  • Abstract:
  • PDF:
  • HTML:
  • Cited by:
History
  • Received:March 12,2020
  • Revised:September 05,2020
  • Adopted:April 02,2020
  • Online: November 04,2020
  • Published: