NDLI: Temperature distribution for controlled-dwell extrusion of γ-TiAl

Content Provider	Springer Nature Link
Author	Liu, Dong Bai, Chun guang Cui, Yu you Yang, Rui
Copyright Year	2005
Abstract	Ti-47Al-2Cr-2Nb-0.15B alloy (atom fraction) was extruded at temperatures (T$_{α}$) of 1 250 and 1 330 °C, respectively. The method of adding a thermal insulating layer was used to overcome the problem associated with the flow stress mismatch between the can and the billet during extrusion. Effects of two kinds of insulations, ZrO$_{2}$ powders and silica fibers, on the quality of extrude bar along the radial direction were studied, and the process parameters were optimized by combining with finite element method (FEM). Tensile properties of the extruded alloy at room and elevated temperature were tested. The results show that the silica fibers has better thermal insulating property than ZrO$_{2}$ powders. The temperature distribution in radial is more homogeneous using silica fibers. The alloy has a good balance of yield strength and room temperature ductility and the values are 680 MPa and 3.5%, respectively.
Starting Page	276
Ending Page	279
Page Count	4
File Format	PDF
ISSN	10059784
Journal	Journal of Central South University of Technology
Volume Number	12
Issue Number	3
e-ISSN	19930666
Language	English
Publisher	Central South University of Technology
Publisher Date	2005-01-01
Publisher Place	Changsha
Access Restriction	Subscribed
Subject Keyword	TiAl alloy controlled-dwell extrusion can temperature gradient Engineering Metallic Materials
Content Type	Text
Resource Type	Article
Subject	Mechanics of Materials Materials Science Mechanical Engineering

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