Naturally high fatigue performance of a 3D printing titanium alloy across all stress ratios

Zhan Qu; Zhenjun Zhang; Rui Liu

doi:10.1126/sciadv.ady0937

journal article Aug 22, 2025

Naturally high fatigue performance of a 3D printing titanium alloy across all stress ratios

Zhan Qu

Zhenjun Zhang

Rui Liu

Science Advances Vol. 11 No. 34 · American Association for the Advancement of Science (AAAS)

View at Publisher Save 10.1126/sciadv.ady0937

Abstract

Three-dimensional printing of structural materials, namely, additive manufacturing (AM), has notable advantages in fabricating structurally complex engineering components. These complex components usually endure comprehensive fatigue examination due to their complex stress distribution with varying stress ratios during service. Therefore, it is important to ensure the fatigue reliability of additive manufactured materials across all stress ratios. We found that the AM microstructure itself in a Ti-6Al-4V alloy successfully synthesizes the tripartite advantages of fine prior β grain boundaries, void-free, and fine α grains, which are respectively sensitive to the low, medium, and high stress ratio regions. Under this synergistic effect, the fatigue performance of the natural AM microstructure across all stress ratios not only outperforms all additive manufactured and forged Ti-6Al-4V alloys, but also surpasses other metallic materials. Our finding highlights the potential advantage of additive manufacturing technology in producing complex components with high fatigue resistance, substantially expanding its application scope.

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Metrics

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Citations

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References

Details

Published: Aug 22, 2025
Vol/Issue: 11(34)

Authors

Z

Zhan Qu

Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, PR China.; School of Materials Science and Engineering, University of Science and Technology of China, Shenyang 110016, PR China.

Z

Zhenjun Zhang

Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, PR China.; School of Materials Science and Engineering, University of Science and Technology of China, Shenyang 110016, PR China.

R

Rui Liu

Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, PR China.; School of Materials Science and Engineering, University of Science and Technology of China, Shenyang 110016, PR China.

Cite This Article

Zhan Qu, Zhenjun Zhang, Rui Liu (2025). Naturally high fatigue performance of a 3D printing titanium alloy across all stress ratios. Science Advances, 11(34). https://doi.org/10.1126/sciadv.ady0937

Naturally high fatigue performance of a 3D printing titanium alloy across all stress ratios

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