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Characterization and properties of intermetallic Al3Ti alloy synthesized by reactive foil sintering in vacuum

Published online by Cambridge University Press:  09 September 2016

Ningxia Wei ,
Xiaoxiao Han ,
Xueyi Zhang ,
Yang Cao ,
Chunhuan Guo ,
Zichuan Lu  and
Fengchun Jiang
Ningxia Wei
Affiliation:
Key Laboratory of Superlight Materials & Surface Technology, Ministry of Education, Harbin Engineering University, Harbin 150001, China
Xiaoxiao Han
Affiliation:
College of Aerospace and Civil Engineering, Harbin Engineering University, Harbin 150001, China
Xueyi Zhang
Affiliation:
College of Aerospace and Civil Engineering, Harbin Engineering University, Harbin 150001, China
Yang Cao
Affiliation:
Mechanical and Electrical Engineering Institute, Zhengzhou University of Light Industry, Zhengzhou 450002, China
Chunhuan Guo
Affiliation:
Key Laboratory of Superlight Materials & Surface Technology, Ministry of Education, Harbin Engineering University, Harbin 150001, China
Zichuan Lu
Affiliation:
Key Laboratory of Superlight Materials & Surface Technology, Ministry of Education, Harbin Engineering University, Harbin 150001, China
Fengchun Jiang*
Affiliation:
Key Laboratory of Superlight Materials & Surface Technology, Ministry of Education, Harbin Engineering University, Harbin 150001, China
*
a) Address all correspondence to this author. e-mail: [email protected]
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Abstract

A dense monolithic intermetallic Al3Ti alloy was successfully synthesized via reactive sintering in vacuum using TC4 alloy and pure aluminum foils with appropriate initial thickness. Energy dispersive spectroscopy (EDS), x-ray diffractometry (XRD), and scanning electron microscopy (SEM) were used to characterize the phase and microstructure of Al3Ti alloy. Ultrasonic measurement was performed to evaluate the physical property of Al3Ti alloy. Different thermal analysis, thermogravimetry (TG) and differential scanning calorimetry (DSC) were used to assess the thermal property of Al3Ti alloy. The compressive tests were carried out on a universal load frame to determine the mechanical properties, including the compressive strength and failure strain of the fabricated intermetallic Al3Ti alloy. The current results indicated that the density of Al3Ti alloy is slightly higher than the theoretical density, the average Young's modulus is lower than the theoretical value. A trace of aluminum in Al3Ti alloy was detected, which is distinctly affected on the density, Young's modulus and mechanical properties of this titanium aluminide alloy. The stress–strain curves of Al3Ti alloy shows a linear elastic behavior without any plastic deformation, and the fracture features are the mixed fracture of transgranular and intergranular. Some other fundamental physical and mechanical properties of the Al3Ti alloy were also obtained in the present study.

Keywords

titanium aluminide alloy Al3Tifoil reactive sinteringthermal analysisproperties
Type
Articles
Information
Journal of Materials Research , Volume 31 , Issue 17 , 14 September 2016 , pp. 2706 - 2713
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Copyright
Copyright © Materials Research Society 2016 

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