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Effect of Zr Addition on the Mechanical Properties and Superplasticity of a Forged SP700 Titanium Alloy

by 1,*, 1,2,* and 1
1
School of Materials, Northwestern Polytechnical University, Xi’an 710072, China
2
Northwest Institute for Nonferrous Metal Research, Xi’an 710016, China
*
Authors to whom correspondence should be addressed.
Academic Editor: Adam Grajcar
Materials 2021, 14(4), 906; https://doi.org/10.3390/ma14040906
Received: 10 January 2021 / Revised: 31 January 2021 / Accepted: 8 February 2021 / Published: 14 February 2021
The present study focuses on the effect of 1% Zr addition on the microstructure, tensile properties and superplasticity of a forged SP700 alloy. The results demonstrated that Zr has a significant effect on inhibiting the microstructural segregation and increasing the volume fraction of β-phase in the forged SP700 alloy. After annealing at 820 °C for 1 h and aging at 500 °C for 6 h, the SP700 alloy with 1% Zr showed a completely globular and fine microstructure. The yield strength, ultimate tensile strength and tensile elongation of the alloy with optimized microstructure were 1185 MPa, 1296 MPa and 10%, respectively. The superplastic deformation was performed at 750 °C with an elongation of 1248%. The improvement of tensile properties and superplasticity of the forged SP700 alloy by Zr addition was mainly attributed to the uniform and fine globular microstructures. View Full-Text
Keywords: SP700 alloy; Zr; microstructure; tensile properties; superplasticity SP700 alloy; Zr; microstructure; tensile properties; superplasticity
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MDPI and ACS Style

Han, D.; Zhao, Y.; Zeng, W. Effect of Zr Addition on the Mechanical Properties and Superplasticity of a Forged SP700 Titanium Alloy. Materials 2021, 14, 906. https://doi.org/10.3390/ma14040906

AMA Style

Han D, Zhao Y, Zeng W. Effect of Zr Addition on the Mechanical Properties and Superplasticity of a Forged SP700 Titanium Alloy. Materials. 2021; 14(4):906. https://doi.org/10.3390/ma14040906

Chicago/Turabian Style

Han, Dong, Yongqing Zhao, and Weidong Zeng. 2021. "Effect of Zr Addition on the Mechanical Properties and Superplasticity of a Forged SP700 Titanium Alloy" Materials 14, no. 4: 906. https://doi.org/10.3390/ma14040906

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