Microstructures and Mechanical Properties of Ti-43Al-5V-4Nb-Y Alloy Consolidated by Spark Plasma Sintering

Abstract:

TiAl alloy with a composition of Ti-43Al-5V-4Nb-Y (at.%) was prepared by spark plasma sintering (SPS). The TiAl powders were sintered between 650°C and 1300°C for 5 min under different loads. With the increasing of the temperature, the diffusion of the elements can be observed. Full compaction is achieved in a short period of time and the overall processing duration does not exceed 30 min. A fully lamellar structure was seen in the TiAl alloy after heat treatment. The microstructures of the samples were determined by X-ray diffraction and scanning electron microscopy. Their mechanical properties were evaluated by tensile tests performed at room temperature

• Periodical: Key Engineering Materials (Volume 704)
• Pages: 183-189
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.704.183
• Online since: August 2016
• Authors: Yong Jun Su*, Yi Feng Zheng, De Liang Zhang, Fan Tao Kong
• Keywords: Mechanical Properties, Microstructure, Spark Plasma Sintering, TiAl Alloys

References

[1] Morris MA, Leboeuf M. Analysis of thermal and athermal deformation mechanisms during creep of γ-TiAl alloys. Mater Sci Eng A 1997; 239-240: 429-37.

DOI: 10.1016/s0921-5093(97)00613-8

[2] Loria EA. Gamma titanium aluminides as prospective structural materials. Intermetallics 2000; 1339-45.

DOI: 10.1016/s0966-9795(00)00073-x

[3] Clemens H, Rumberg I, Schretter P, Schwantes S. Characterization of Ti-48Al-2Ce sheet material. Intermetallics 1994; 179-84.

DOI: 10.1016/0966-9795(94)90056-6

[4] Jarvis DJ, Voss D. Impress integrated project – an overview paper. Mat Sci Eng 2005; 413-414: 583-91.

DOI: 10.1016/j.msea.2005.09.066

[5] German RM. Powder metallurgy science. NJ: MPIF; (1994).

[6] Couret A, Molénat G, Galy J, Thomas M. Microsturctures and mechanical properties of TiAl alloys consolidated by spark plasma sintering. Intermetallics 2008; 16: 1134-41.

DOI: 10.1016/j.intermet.2008.06.015

[7] Lagos MA, Agote I. SPS synthesis and consolidation of TiAl alloys from elemental powders: Microstructure evolution. Intermetallics 2013; 36: 51-6.

DOI: 10.1016/j.intermet.2013.01.006

[8] Jabbar H, Monchoux JP, Houdellier F, Dollé M, Schimansky FP, Pyczak F, Thomas M, Couret A. Microsturcture and mechanical properties of high niobium containing TiAl alloys elaborated by spark plasma sintering. Intermetallics 2010; 18(12): 2312-21.

DOI: 10.1016/j.intermet.2010.07.024

[9] Calderon HA, Garibay-Febles V, Umemoto M, Yamaguchi M. Mechanical properties of nanocrystalline Ti-Al-X alloys. Mat Sci Eng A 2002; 329-331: 196-205.

DOI: 10.1016/s0921-5093(01)01568-4

[10] Mei B, Miyamoto Y. Preparation of Ti-Al intermetallic compounds by spark plasma sintering. Metallurgical Mater Trans A-physical Metall Mater Sci 2001: 32(3A): 843-7.

DOI: 10.1007/s11661-001-0101-2

[11] Um TY, Abe T, Sumi S. Fabrication of intermetallic compounds by spark plasma sintering. J Mater Synth Process 1999; 7(5): 303-8.

[12] Jiang QC, Wang HY, Zhao YG, Li XL. Solid-state reaction behavior of Al-Ti-C powder mixture compacts. Mater. Res. Bull. 2005; 40: 521-7.

DOI: 10.1016/j.materresbull.2004.11.002

[13] Nieh TG, Hsiung LM, Wadsworh J, Intermetallics 7 (1999) 163-170.