Study on the strength and toughness mechanism of multilayered gradient ultrafine-grained titanium

Liu Jiawen; Fang Hongmei; Cao Lili; Zhang Ya; Yang Dengke

doi:10.7513/j.issn.1004-7638.2023.03.014

Volume 44 Issue 3

Jun. 2023

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Liu Jiawen, Fang Hongmei, Cao Lili, Zhang Ya, Yang Dengke. Study on the strength and toughness mechanism of multilayered gradient ultrafine-grained titanium[J]. IRON STEEL VANADIUM TITANIUM, 2023, 44(3): 93-99. doi: 10.7513/j.issn.1004-7638.2023.03.014

Citation:

Liu Jiawen, Fang Hongmei, Cao Lili, Zhang Ya, Yang Dengke. Study on the strength and toughness mechanism of multilayered gradient ultrafine-grained titanium[J]. IRON STEEL VANADIUM TITANIUM, 2023, 44(3): 93-99. doi: 10.7513/j.issn.1004-7638.2023.03.014

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Study on the strength and toughness mechanism of multilayered gradient ultrafine-grained titanium

doi: 10.7513/j.issn.1004-7638.2023.03.014

1.
School of Mechanical and Energy Engineering, Zhejiang University of Science and Technology, Hangzhou 310023, Zhejiang, China
2.
College of Engineering, Zhejiang Normal University, Jinhua 321004, Zhejiang, China

Received Date: 2022-11-03
Publish Date: 2023-06-30

Abstract

Abstract

In view of the poor toughness and work hardening performance of ultra-fine grained (UFG) metals at room temperature, we designed and prepared the micro multilayer hierarchical structure (MHS) of metal materials using low-temperature rolling and surface mechanical attrition treatment (SMAT) processes, which improved the mechanical properties and work hardening ability of UFG Ti. The microstructure observation and mechanical properties testing, combined with fracture surface analysis, show that the multilayer gradient microstructure can improve the work hardening ability of ultrafine-grained metal, achieving a more moderate stress distribution and an improved resistance of the workpiece to failure cracks. A fracture mechanics model is proposed to explain the crack arrest effect of the MHS.
- ultrafine-grained materials,
- Ti,
- toughening,
- multilayered structure,
- gradient structure

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References(26)

References

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