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Volume 12
Issue 23
10.3390/ma12233950
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Communication

Adaptive Volume Control in Titanium Alloy for High Temperature Performance

by
Pei Li
1,
Xun Sun
2,3,
Tianlong Zhang
2,
Hualei Zhang
2,
Dong Wang
2,*,
Qiaoyan Sun
1,*,
Lin Xiao
1 and
Jun Sun
1
1
State Key Laboratory for Mechanical Behavior of Materials, Xi’an Jiaotong University, Xi’an 710049, China
2
Center of Microstructure Science, Frontier Institute of Science and Technology, Xi’an Jiaotong University, Xi’an 710049, China
3
Applied Materials Physics, Department of Materials Science and Engineering, Royal Institute of Technology, SE-10044 Stockholm, Sweden
*
Authors to whom correspondence should be addressed.
Materials 2019, 12(23), 3950; https://doi.org/10.3390/ma12233950
Submission received: 21 October 2019 / Revised: 25 November 2019 / Accepted: 26 November 2019 / Published: 28 November 2019
(This article belongs to the Section Smart Materials)
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Abstract

With the increase of time, the shrinkage of materials at fixed temperature could enhance the failure of fasteners. We report a potential way to alter the volume/length of alloy automatically through isothermal aging due to pseudospinodal decomposition mechanism. The volume of Ti-10V-2Fe-3Al alloy first shrunk and then expanded during isothermal aging at 550 °C. It can fit tightly and make up for volume loss. Transmission electron microscopy observation exhibits no obvious coarsening of intragranular α phase with the increasing time. However, composition evolution with time shows a gradual change through energy dispersive spectrometer analysis. The result shows that β stabilizers, V and Fe, are prone to diffuse to the β matrix, while α stabilizers, Al, prefer to segregate to the α phase. First principle calculations suggest that the structure transition for β to α cause the first decrease of volume, and the diffusion of V, Fe and Al is the origin of the later abnormal increase of volume.
Keywords: Ti-1023 alloy; adaptive volume; isothermal; high temperature performance Ti-1023 alloy; adaptive volume; isothermal; high temperature performance
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MDPI and ACS Style

Li, P.; Sun, X.; Zhang, T.; Zhang, H.; Wang, D.; Sun, Q.; Xiao, L.; Sun, J. Adaptive Volume Control in Titanium Alloy for High Temperature Performance. Materials 2019, 12, 3950. https://doi.org/10.3390/ma12233950

AMA Style

Li P, Sun X, Zhang T, Zhang H, Wang D, Sun Q, Xiao L, Sun J. Adaptive Volume Control in Titanium Alloy for High Temperature Performance. Materials. 2019; 12(23):3950. https://doi.org/10.3390/ma12233950

Chicago/Turabian Style

Li, Pei, Xun Sun, Tianlong Zhang, Hualei Zhang, Dong Wang, Qiaoyan Sun, Lin Xiao, and Jun Sun. 2019. "Adaptive Volume Control in Titanium Alloy for High Temperature Performance" Materials 12, no. 23: 3950. https://doi.org/10.3390/ma12233950

APA Style

Li, P., Sun, X., Zhang, T., Zhang, H., Wang, D., Sun, Q., Xiao, L., & Sun, J. (2019). Adaptive Volume Control in Titanium Alloy for High Temperature Performance. Materials, 12(23), 3950. https://doi.org/10.3390/ma12233950

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