Microstructural evolution and tensile property enhancement of remanufactured Ti6Al4V using hybrid manufacturing of laser directed energy deposition with laser shock peening

Lu, Haifei; Wu, Lin; Wei, Huiliang; Cai, Jie; Luo, Kaiyu; Xu, Xiang; Lu, Jinzhong

doi:10.1016/j.addma.2022.102877

Cited by 33 publications

(26 citation statements)

References 58 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Comparing Figure 10a,b, when the external load ratio is kept constant (R load = 0.1), it is obvious that the smaller the applied load is, the more obvious is the effect of the compressive residual stress caused by LSP on the overall SIF. This is because the effect of the compressive residual stress caused by LSP on the overall SIF plays a dominant role under a smaller applied load according to Equation (12). The effective stress ratios of the specimens treated by the three methods are shown in Figure 10c.…”

Section: Analysis Of the Effect Of Residual Stress On Fatigue Crack P...mentioning

confidence: 98%

“…The effect of LSP on the microstructure and mechanical properties of DED specimens was evaluated, and the fatigue strength was increased by 12.46%. Lu et al [ 12 ] induced compressive residual stresses on the surface of DED parts by LSP, resulting in the formation of high‐density dislocations in the material and refining the coarse grains into nanoscale grains to resist crack initiation and propagation. Tong et al [ 13 ] adjusted the microstructure of specimens deposited by laser‐directed energy deposition through the LSP postprocessing method.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Effects of Residual Stress Induced by Laser Shock Peening on Fatigue Crack Propagation Behavior in Directed Energy Deposition Stainless Steel

Duan,

Shang,

Luo

et al. 2023

steel research int.

View full text Add to dashboard Cite

To investigate the effect of laser shock peening (LSP) on the fatigue crack propagation behavior of 316L stainless steel fabricated by directed energy deposition (DED), three‐dimensional finite element models of DED and compact tensile specimens before and after LSP are developed. The residual stress fields induced by DED and LSP are simulated, as well as the effects of different residual stresses on the stress intensity factor and effective stress ratio based on the contour integral method is also analyzed. The microstructure of the LSP region is observed by SEM. When the crack length increases from 12 mm to 22.5 mm, the average effective stress ratio of the DED specimen is 0.133, and the average effective stress ratio of the DED specimen after LSP decreases to 0.110, which decreases by 17.3%. The fatigue lives of the DED specimen before and after LSP are 62.7% and 105.2% of that of the hot‐rolled plate. After LSP treatment, the fatigue life of the DED specimen is increased by about 1.68 times. The fracture morphology in the transient fracture zone changes from ductile and brittle mixed fracture to ductile fracture.This article is protected by copyright. All rights reserved.

show abstract

Section: Analysis Of the Effect Of Residual Stress On Fatigue Crack P...mentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

Effects of Residual Stress Induced by Laser Shock Peening on Fatigue Crack Propagation Behavior in Directed Energy Deposition Stainless Steel

Duan,

Shang,

Luo

et al. 2023

steel research int.

View full text Add to dashboard Cite

show abstract

“…Laser shock peening (LSP) has also been utilized as an auxiliary field of LAM Ti alloys [151]. Compared with in-situ rolling, LSP is characterized by a high pressure and ultrahigh strain rate (>10 6 s −1 ).…”

Section: Mechanical-field Assisted Lam Of Ti Alloysmentioning

confidence: 99%

Recent innovations in laser additive manufacturing of titanium alloys

Su,

Jiang,

Teng

et al. 2024

Int. J. Extrem. Manuf.

View full text Add to dashboard Cite

Titanium (Ti) alloys are widely used in frontier fields like aerospace and biomedical engineering. Laser additive manufacturing (LAM), as an innovative technology, is the key driver for the development of Ti alloys. Despite the significant advancements in LAM of Ti alloys, there remain challenges that need further research and development efforts. To recap the potential of LAM high-performance Ti alloy, this article systematically reviews LAM Ti alloys with up-to-date information on process, materials, and properties. Several feasible solutions to advance LAM Ti alloys were reviewed, including intelligent process parameters optimization, LAM process innovation with auxiliary fields and novel Ti alloys customization for LAM. The auxiliary energy fields (e.g., thermal, acoustic, mechanical deformation and magnetic fields) that can be applied during LAM Ti alloys affect the melt pool dynamics and solidification behaviour, altering microstructures and mechanical performances. Different kinds of novel Ti alloys customized for LAM, like peritectic α-Ti, eutectoid (α+β)-Ti, hybrid (α+β)-Ti, isomorphous β-Ti and eutectic β-Ti alloys are reviewed in detail. Furthermore, machine learning in accelerating the LAM process optimization and new materials development is also outlooked. The review summarizes the material properties and performance envelops and benchmarks the research achievements in LAM of Ti alloys. In addition, the perspectives and further trends in LAM of Ti alloys are also highlighted.

show abstract

“…Due to the increasing demand of high specific-strength alloys in aerospace, aviation and marine sectors, titanium (Ti) alloys have received a lot of attention. Among them, the Ti-6Al-4V alloy reveals good balance properties, such as high specific strength and ductility, and becomes one of the most excellent alloys [1][2][3]. Forged Ti-6Al-4V alloy has been commonly used in aerospace and other fields because of its excellent yield strength, tensile strength and ductility.…”

Section: Introductionmentioning

confidence: 99%

Dynamic recrystallization of Ti-6Al-4V alloy promoted by laser shock peening

Zhang,

Ouyang,

et al. 2023

J. Phys.: Conf. Ser.

View full text Add to dashboard Cite

In this study, the influences of different numbers of passes of laser shock peening (LSP) on the surface microstructures of Ti-6Al-4V alloy were investigated. Especially, the microstructural evolution of the As-received (AR) sample and LSP treated samples was observed by scanning electron microscope (SEM) and electron backscatter diffraction (EBSD) observations. The results showed the grain size and the distribution of α, β phase have changed after the LSP process. After 1 LSP processing, the grain size is more uniform, the β phases were transformed from scattered and laminar characteristics to linear characteristics, while the α phases were parcelled by the β phases. After 2 LSP treatment, obvious grain refinement can be observed and the influence depth is deeper compared to the 1 LSP sample. After laser shock peeing processing, the material also has obvious dynamic recrystallization (DRX). Finally, the mechanism of microstructure evolution by LSP was revealed.

show abstract

Microstructural evolution and tensile property enhancement of remanufactured Ti6Al4V using hybrid manufacturing of laser directed energy deposition with laser shock peening

Cited by 33 publications

References 58 publications

Effects of Residual Stress Induced by Laser Shock Peening on Fatigue Crack Propagation Behavior in Directed Energy Deposition Stainless Steel

Effects of Residual Stress Induced by Laser Shock Peening on Fatigue Crack Propagation Behavior in Directed Energy Deposition Stainless Steel

Recent innovations in laser additive manufacturing of titanium alloys

Dynamic recrystallization of Ti-6Al-4V alloy promoted by laser shock peening

Contact Info

Product

Resources

About