Paper Titles
Determination of the Work Hardening Exponent by the Hollomon and Differential Crussard-Jaoul Analyses of Cold Drawn Ferrite-Pearlite Steels
p.37
Microstructure and Self-Affine Fracture Surface Parameters in Steel
p.43
Dislocation Mechanisms and Plasticity of Quasicrystals: TEM Observations in Icosahedral AlPdMn
p.49
In Situ Deformation at 850°C of Standard and Rafted Microstructures of Nickel Base Superalloys
p.57
Compressive Mechanical Properties of Nanostructured Intermetallic Alloys Al3Ti-X (X = Mn or Fe)
p.63
The Effect of Hot Rolling on Room Temperature Ductility of a NiAl Intermetallic Compound
p.69
Grain Refinement during Superplastic Deformation of Coarse-Grained Al-Mg-Cu Alloys
p.75
Strain-Resistivity Behavior of a Ti-45Ni-5Cu Shape Memory Alloy during Superelastic and SATWME Cycling
p.81
Micro and Macromechanical Study of Stress-Induced Martensitic Transformation in a Cu-Al-Be Polycrystalline Shape Memory Alloy
p.87

Compressive Mechanical Properties of Nanostructured Intermetallic Alloys Al3Ti-X (X = Mn or Fe)

Article Preview

Abstract:

The mechanical behavior of the sintered nanostructured intermetallic alloys, Al67Ti25Mn8 and Al67Ti25Fe8 has been investigated by means of compression tests as a function of temperature. These intermetallic materials are produced by mechanical alloying and spark plasma sintering. The sintered alloys have been characterized by X-Ray Diffraction and Transmission Electron Microscopy. Their nanostructure consists of a single-phase with an L12 (cubic) structure and an average grain size in the nanoscale (lower than 30 nm). These nanostructured intermetallics show considerably high ductility in compression at high temperature but are brittle at temperatures below 400 °C. In such cases the compressive fracture strength can reach values as high as 1.8 GPa (Al67Ti25Fe8). At 500 °C, some ductility is found together with a relatively high flow stress (around 1 GPa), the corresponding deformation curve shows strain hardening and in some cases stress serrations (strain aging). At 600 °C, a low flow stress is measured (~300 MPa) with high ductility. At 700 and 800 °C, a quasi-superplastic behavior is found with a total deformation of around 45 and very low flow stresses. No evidence of dislocation motion is found at temperatures above 700 °C suggesting a deformation mechanism based on grain boundary sliding.

You might also be interested in these eBooks
Advanced Structural Materials II View Preview

Info:

Periodical:

Materials Science Forum (Volume 509)

Pages:

63-68

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.509.63

Citation:

Cite this paper

Online since:

March 2006

Authors:

J.C. Aguilar-Virgen, A.F. Cabrera, Minoru Umemoto, H.A. Calderón

Keywords:

Intermetallic, Mechanical Property, Nanostructure

Export:

RIS, BibTeX

Price:

Permissions CCC:

Request Permissions

Permissions PLS:

Request Permissions

Сopyright:

© 2006 Trans Tech Publications Ltd. All Rights Reserved

Share:

Citation:

References

[1] M. Yamaguchi and H. Inui: Al3Ti and L12 Variations, Vol. 3, Structural Applications of Intermetallic Compounds, edited by J. H. Westbrook and R. L. Fleischer (John Wiley & Sons, Ltd ©, USA 2000) p.151.

Google Scholar

[2] L. Lu and M. O. Lai: Mechanical Alloying (Kluwer Academic Publisher, USA 1998).

Google Scholar

[3] M. Tokita: Trends in Advanced SPS Spark Plasma Sintering Systems and Technology, J. Soc. Powder Tech. Vol. 30, (1993), p.790.

Google Scholar

[4] H. A. Calderon, V. Garibay-Febles, A. Cabrera, N. Mota-Solis, M. Umemoto and M. Yamaguchi: Structural Intermetallics (2001), p.638.

Google Scholar

[5] E. P. George, D. P. Pope, C.L. Fu and J.H. Schneibel: ISIJ International Vol. 31, (1991) p.1063.

Google Scholar

[6] D. G. Morris, R. Lerf and M. Leboeuf: Acta Metall. Mater. Vol. 43 (1995), p.2825.

Google Scholar

[7] P. Veyssière: Mater. Sci. Eng. A Vol. 309-310 (2001), p.44.

Google Scholar

[8] H. A. Calderon, V. Garibay-Febles, M. Umemoto and J. G. Cabañas-Moreno: Mater. Sci. Eng. Vol. 329-331 (2002) p.196.

Google Scholar