Effect of Si Addition on the Microstructures and Mechanical Properties of TiAl Intermetallics

Zhu, Jian Feng; Yang, Wen Wen; Li, Shao Dan

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Paper Titles

A Method of Improving Limiting Drawing Ratio：Differential Temperature Deep Drawing Based on Superplasticity, p.392
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Method Study of Improving Surface Corrosion Resistance of 6063 Aluminum Alloy, p.404
Diallyl Orthophthalate(DAOP) Resin as a Reactive Plasticizer for Optimizing Glass-fiber/PVC Interface and Reactive Kinetics, p.408
Effect of Si Addition on the Microstructures and Mechanical Properties of TiAl Intermetallics, p.413
Study of Friction Stir Spot Welding of Steel/ Magnesium, p.417
Buckling Behavior of FGM Elastic Arches Subjected to Uniformly Distributed Radial Follow Load, p.422
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Study of Lost Foam Casting of Reaper Underpan, p.433

Home > Advanced Materials Research > Advanced Materials > Effect of Si Addition on the Microstructures and...

Paper Title:

Effect of Si Addition on the Microstructures and Mechanical Properties of TiAl Intermetallics

Periodical	Advanced Materials Research (Volumes 239 - 242)
Main Theme	Advanced Materials
Edited by	Zhong Cao, Xueqiang Cao, Lixian Sun, Yinghe He
Pages	413-416
DOI	10.4028/www.scientific.net/AMR.239-242.413
Citation	Jian Feng Zhu et al., 2011, Advanced Materials Research, 239-242, 413
Online since	May, 2011
Authors	Jian Feng Zhu, Wen Wen Yang, Shao Dan Li
Keywords	Composite, Microstructure, Ti₅Si₃, TiAl
Price	US$ 28,-

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Abstract

TiAl/Ti₅Si₃ in situ composites were successfully fabricated by reactive hot-press method from powder mixtures of Ti, Al and Si. The influence of the Si addition on the microstructures and mechanical properties of TiAl/Ti₅Si₃ composites was investigated in detail. The results show that an appropriate amount of addition of Si refined the matrix structure obviously due to the in situ formed Ti₅Si₃, and as a result, the flexural strength and fracture toughness of the composites are modified. When the Si content is 1.82 wt %, the flexural strength and the fracture toughness reach the maximum value of 685.67 MPa and 9.02 MPa·m^1/2, respectively. The enhancing mechanism was also discussed.