Next Article in Journal
Bainitic Transformation and Properties of Low Carbon Carbide-Free Bainitic Steels with Cr Addition
Next Article in Special Issue
Effect of Fe-Content on the Mechanical Properties of Recycled Al Alloys during Hot Compression
Previous Article in Journal
A Finite Element Model to Simulate Defect Formation during Friction Stir Welding
Previous Article in Special Issue
Effect of Anode Pulse-Width on the Microstructure and Wear Resistance of Microarc Oxidation Coatings
Article Menu
Issue 7 (July) cover image

Export Article

Open AccessArticle
Metals 2017, 7(7), 261; doi:10.3390/met7070261

Characteristics of the Dynamic Recrystallization Behavior of Ti-45Al-8.5Nb-0.2W-0.2B-0.3Y Alloy during High Temperature Deformation

State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi’an 710072 Shaanxi, China
*
Author to whom correspondence should be addressed.
Received: 7 June 2017 / Revised: 30 June 2017 / Accepted: 4 July 2017 / Published: 8 July 2017
(This article belongs to the Special Issue Light Weight Alloys: Processing, Properties and Their Applications)
View Full-Text   |   Download PDF [8439 KB, uploaded 8 July 2017]   |  

Abstract

The dynamic recrystallization (DRX) behavior of Ti-45Al-8.5Nb-0.2W-0.2B-0.3Y (at %) alloy has been investigated through hot compression tests. The tests were executed at a temperature range of 1000–1200 °C and a strain rate range of 0.001–1 s−1 under a true strain of 0.9. It was found that the α2 phase which is produced during heat treatment is reduced during hot compression due to thermo-mechanical coupling. The value of the activation energy is 506.38 KJ/mol. With the increase in deformation temperature and the decrease in strain rate, DRX is more likely to occur, as a result of sufficient time and energy for the DRX process. Furthermore, the volume fraction of high angle grain boundaries increases to 89.01% at a temperature of 1200 °C and the strain rate of 0.001 s−1, meaning completely dynamic recrystallization. In addition, DRX is related to the formation of twin boundaries. The volume fraction of twin boundaries rises to 16.93% at the same condition of completely dynamic recrystallization. View Full-Text
Keywords: titanium aluminides; hot compression; dynamic recrystallization; microstructure titanium aluminides; hot compression; dynamic recrystallization; microstructure
Figures

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

Scifeed alert for new publications

Never miss any articles matching your research from any publisher
  • Get alerts for new papers matching your research
  • Find out the new papers from selected authors
  • Updated daily for 49'000+ journals and 6000+ publishers
  • Define your Scifeed now

SciFeed Share & Cite This Article

MDPI and ACS Style

Xiang, L.; Tang, B.; Xue, X.; Kou, H.; Li, J. Characteristics of the Dynamic Recrystallization Behavior of Ti-45Al-8.5Nb-0.2W-0.2B-0.3Y Alloy during High Temperature Deformation. Metals 2017, 7, 261.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Metals EISSN 2075-4701 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top