Hostname: page-component-586b7cd67f-rcrh6 Total loading time: 0 Render date: 2024-11-28T01:05:21.618Z Has data issue: false hasContentIssue false
  • English
  • Français

Transmission Electron Microscopy Characterization of Thermomechanically Treated Al3Ti–(8, 10, 15)% Cr Intermetallics

Published online by Cambridge University Press:  06 August 2013

Ok Jun Jang ,
Cheol-Woong Yang  and
Dong Bok Lee
Ok Jun Jang
Affiliation:
School of Advanced Materials Science & Engineering, Sungkyunkwan University, Suwon 440-746, SouthKorea
Cheol-Woong Yang
Affiliation:
School of Advanced Materials Science & Engineering, Sungkyunkwan University, Suwon 440-746, SouthKorea
Dong Bok Lee*
Affiliation:
School of Advanced Materials Science & Engineering, Sungkyunkwan University, Suwon 440-746, SouthKorea
*
*Corresponding author. E-mail: [email protected]
Get access

Abstract

The ordered L12-type Al3Ti–(8, 10, 15)% Cr intermetallic compounds, namely, Al67Ti25Cr8, Al66Ti24Cr10, and Al59Ti26Cr15, were prepared by induction melting followed by thermomechanical treatment. Their microstructure, compositional variation, and crystal structure were characterized using X-ray diffraction, optical microscopy, and scanning and transmission electron microscopy equipped with energy-dispersive spectroscopy. The Al67Ti25Cr8 alloy consisted of the L12-Al3Ti matrix and precipitates of α2-Ti3Al, D022-Al3Ti, and γ-TiAl. The Al66Ti24Cr10 and Al59Ti26Cr15 alloys consisted of the L12-Al3Ti matrix and grains of α-TiAl and β-Cr.

Keywords

titanium trialuminideschromiumphase diagramintermetallicstransmission electron microscopyenergy-dispersive spectrometry
Type
Research Article
Information
Microscopy and Microanalysis , Volume 19 , Supplement S5: IUMAS , August 2013 , pp. 89 - 94
Copyright
Copyright © Microscopy Society of America 2013 

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Jewett, T.J., Ahrens, B. & Dahms, M. (1996). Phase equilibria involving the τ-L12 and TiAl2 phases in the Ti–Al–Cr system. Intermetallics 4, 543–556.10.1016/0966-9795(96)00044-1Google Scholar
Kim, G.H. & Ahn, J.P. (2006). Phase identification of nano-phase materials using convergent beam electron diffraction (CBED) technique. Korean J Microsc 1, 47–56.Google Scholar
Kim, G.H., Kim, H.S. & Kum, D.W. (1996). Simple procedure for phase identification using convergent beam electron diffraction patterns. Microsc Res Techniq 33, 510–515.10.1002/(SICI)1097-0029(19960415)33:6<510::AID-JEMT6>3.0.CO;2-O3.0.CO;2-O>Google Scholar
Klansky, J.L., Nic, J.P. & Mikkola, D.E. (1994). Structure/property observations for Al–Ti–Cr intermetallic alloys. J Mater Res 9, 255–258.10.1557/JMR.1994.0255Google Scholar
Kumar, K.S. & Brown, S.A. (1996). Response to three-point bending of the forged L12 compound Al66Ti25Cr9. Intermetallics 4, 231–244.10.1016/0966-9795(95)00042-9Google Scholar
Lee, J.K., Oh, M.W., Oh, M.H. & Wee, D.M. (2003). Phase stability of L12 based alloys in Al–Ti–Cr systems. Intermetallics 11, 857–865.10.1016/S0966-9795(03)00084-0Google Scholar
Mabuchi, H., Tsuda, H., Matsui, T. & Morii, K. (1997). Microstructure and mechanical properties of ternary L12 intermetallic compound in Al–Ti–Cr system. Mater Trans JIM 38, 560–565.10.2320/matertrans1989.38.560Google Scholar
Nakayama, Y. & Mabuchi, H. (1993). Formation of ternary L12 compounds in Al3Ti-base alloys. Intermetallics 1, 41–48.10.1016/0966-9795(93)90020-VGoogle Scholar
Nic, J.P., Klansky, J.L. & Mikkola, D.E. (1992). Structure/property observations for Al–Ti–Cr alloys near the cubic (Al,Cr)3Ti phase. Mater Sci Eng A152, 132–137.10.1016/0921-5093(92)90058-9Google Scholar
Parfitt, L.J., Smialek, J.L., Nic, J.P. & Mikkola, D.E. (1991). Oxidation behavior of cubic phases formed by alloying aluminum-titanium (Al3Ti) with chromium and manganese. Scripta Metall Mater 25, 727–731.10.1016/0956-716X(91)90123-IGoogle Scholar
Raghava, V. (2005). Al–Cr–Ti. J Phase Equilib Diff 26, 349–356.Google Scholar
Stein, F., Zhang, L.C., Sauthoff, G. & Palm, M. (2001). TEM and DTA study on the stability of Al5Ti3- and h-Al2Ti-superstructures in aluminium-rich TiAl alloys. Acta Mater 49, 2919–2932.10.1016/S1359-6454(01)00208-7Google Scholar
Xu, H., Jin, Z. & Wang, R. (1997). Study on the phase equilibria of the Al–Cr–Ti system at 1050°C. Scripta Mater 37, 1469–1473.10.1016/S1359-6462(97)00298-4Google Scholar