Effect of Laser Shock Peening on Properties of Heat-Treated Ti–6Al–4V Manufactured by Laser Powder Bed Fusion

Yeo, In-Kyu; Bae, Seong-Guk; Amanov, Auezhan; Jeong, Sungho

doi:10.1007/s40684-020-00234-2

Cited by 27 publications

(4 citation statements)

References 47 publications

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“…In this case, the second harmonic of 532 nm is usually used, and no protective layer is applied [25]. However, Yeo et al applied LSP post-treatment with the second harmonic 532 nm to improve the surface properties of heat-treated Ti6A14V fabricated with LPBF [81]. The residual stress results showed that the LSP application significantly improved the material properties by producing a CRS that is 6 times higher than that of the sample HT, about 2.6 times higher than that of the sample that received surface milling treatment, and more than 10 times higher than that of the as-built sample.…”

Section: Wavelengthmentioning

confidence: 99%

“…Another material commonly used in LSP studies is titanium alloy. For ex Inkyu Yeo et al [81] performed LSP experiments on heat-treated Ti6A14V processe LPBF to improve its surface properties. Three different laser energies were used to the hardness: 1.9 GW, 5.7 GW, and 9.1 GW.…”

Section: Hardnessmentioning

confidence: 99%

“…In all these studies, LSP treatment positivel tributed to the improvement in the hardening properties of the additively manufa materials, which was possible due to the grain refinement and CRS produced by L Another material commonly used in LSP studies is titanium alloy. For example, Inkyu Yeo et al [81] performed LSP experiments on heat-treated Ti6A14V processed with LPBF to improve its surface properties. Three different laser energies were used to obtain the hardness: 1.9 GW, 5.7 GW, and 9.1 GW.…”

Section: Hardnessmentioning

confidence: 99%

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Review on Laser Shock Peening Effect on Fatigue of Powder Bed Fusion Materials

Bumba,

Morais,

Batalha

et al. 2023

Metals

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The ability to manufacture parts with complex geometry by sending a model from CAD directly to the manufacturing machine has attracted much attention in the industry, driving the development of additive manufacturing technology. However, studies have shown that components manufactured using additive manufacturing technology have several problems, namely high tensile residual stresses, cracks, and voids, which are known to have a major impact on material performance (in service). Therefore, various post-treatment methods have been developed to address these drawbacks. Among the post-treatment techniques, laser shock peening (LSP) is currently considered one of the most efficient post-treatment technologies for improving the mechanical properties of materials. In practice, LSP is responsible for eliminating unfavorable tensile residual stresses and generating compressive residual stresses (CRS), which result in higher resistance to crack initiation and propagation, thus increasing component life. However, since CRS depends on many parameters, the optimization of LSP parameters remains a challenge. In this paper, a general overview of AM and LSP technology is first provided. It then describes which parameters have a greater influence during powder bed melting and LSP processing and how they affect the microstructure and mechanical properties of the material. Experimental, numerical, and analytical optimization approaches are also presented, and their results are discussed. Finally, a performance evaluation of the LSP technique in powder bed melting of metallic materials is presented. It is expected that the analysis presented in this review will stimulate further studies on the optimization of parameters via experimental, numerical, and perhaps analytical approaches that have not been well studied so far.

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Section: Wavelengthmentioning

confidence: 99%

Section: Hardnessmentioning

confidence: 99%

Section: Hardnessmentioning

confidence: 99%

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Review on Laser Shock Peening Effect on Fatigue of Powder Bed Fusion Materials

Bumba,

Morais,

Batalha

et al. 2023

Metals

View full text Add to dashboard Cite

show abstract

“…The residual-stress distribution in the width (transverse) direction of the laser-peened surface is also often found to be non-uniform due to the plastic-wave nature of the LSP strain [24,40]. As a result of the significant residual stresses, LSP normally results in a marked enhancement in fatigue properties [7][8][9]12,19,30,33,[41][42][43][44][45], wear resistance [17,23,47], and surface hardness [6][7][8][9]11,16,17,23,31,33,38,43,[46][47][48].…”

Section: Introductionmentioning

confidence: 99%