Fatigue Threshold and Microstructure Characteristic of TC4 Titanium Alloy Processed by Laser Shock DOI Creative Commons

Shanshun Zha,

Hengyun Zhang, Jiong Yang

и другие.

Metals, Год журнала: 2025, Номер 15(4), С. 453 - 453

Опубликована: Апрель 17, 2025

Laser shock peening (LSP) is an effective method to improve the fatigue property of metallic materials, and a thorough understanding its strengthening mechanism crucial for technology application. In this study, LSP tests TC4 titanium alloy have been carried out. Combined with structural characterization crystal plasticity finite element (CPFE) simulation, relationship stress distribution, microstructure evolution performance caused by revealed. The results indicate that material’s life initially increases subsequently declines rising pulse energy. At optimal energy condition, laser-shocked specimen demonstrates 126% increase in relative untreated specimen, which accompanied higher residual compressive along depth. Meanwhile, grains become more refined uniform size change gradient, β phase content drops from 4.1% 2.2%. Notably, regions <1-21-0> orientation can be selectively achieved. With favorable slip direction orthogonal applied loading axis, generation propagation dislocations are effectively constrained, thereby significantly enhancing performance. distribution models different grain sizes contents further analyzed CPFE method, showing good consistency experimental results. Theoretically, excessively high causes transient temperature (1769 °C) surpass melting point (1660 °C), affect recrystallization structure distribution.

Язык: Английский

Fatigue Threshold and Microstructure Characteristic of TC4 Titanium Alloy Processed by Laser Shock DOI Creative Commons

Shanshun Zha,

Hengyun Zhang, Jiong Yang

и другие.

Metals, Год журнала: 2025, Номер 15(4), С. 453 - 453

Опубликована: Апрель 17, 2025

Laser shock peening (LSP) is an effective method to improve the fatigue property of metallic materials, and a thorough understanding its strengthening mechanism crucial for technology application. In this study, LSP tests TC4 titanium alloy have been carried out. Combined with structural characterization crystal plasticity finite element (CPFE) simulation, relationship stress distribution, microstructure evolution performance caused by revealed. The results indicate that material’s life initially increases subsequently declines rising pulse energy. At optimal energy condition, laser-shocked specimen demonstrates 126% increase in relative untreated specimen, which accompanied higher residual compressive along depth. Meanwhile, grains become more refined uniform size change gradient, β phase content drops from 4.1% 2.2%. Notably, regions <1-21-0> orientation can be selectively achieved. With favorable slip direction orthogonal applied loading axis, generation propagation dislocations are effectively constrained, thereby significantly enhancing performance. distribution models different grain sizes contents further analyzed CPFE method, showing good consistency experimental results. Theoretically, excessively high causes transient temperature (1769 °C) surpass melting point (1660 °C), affect recrystallization structure distribution.

Язык: Английский

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