Microstructure, residual stress and tensile properties control of wire-arc additive manufactured 2319 aluminum alloy with laser shock peening

Sun, Rujian; Li, Liuhe; Zhu, Ying; Guo, Wei; Peng, Peng; Cong, Baoqiang; Sun, Jianfei; Che, Zhigang; Li, Bo; Guo, Chao; Liu, Lei

doi:10.1016/j.jallcom.2018.02.353

Cited by 270 publications

(71 citation statements)

References 45 publications

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“…The residual stress in the WAAM process was tensile stress in the non-equilibrium solidification process reported by Sun et al The lattice constant would become larger under the tensile stress. But, all XRD peak positions actually shift to the high scattering angles which indicated that the lattice constant of the Al matrix becomes smaller according to the Bragg equation [ 22 , 23 ]. Therefore, the lattice reduction was mainly caused by the incorporation of Cu solute atoms, which have a smaller radius than Al, into the Al matrix.…”

Section: Resultsmentioning

confidence: 99%

Microstructure Evolution and Mechanical Behavior of 2219 Aluminum Alloys Additively Fabricated by the Cold Metal Transfer Process

Fang

Zhang²,

Li³

et al. 2018

Materials

100

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In this research, four different welding arc modes including conventional cold metal transfer (CMT), CMT-Pulse (CMT-P), CMT-Advanced (CMT-ADV), and CMT pulse advanced (CMT-PADV) were used to deposit 2219-Al wire. The effects of different arc modes on porosity, pore size distribution, microstructure evolution, and mechanical properties were thoroughly investigated. The statistical analysis of the porosity and its size distribution indicated that the CMT-PADV process gave the smallest pore area percentage and pore aspect ratio, and had almost no larger pores. The results from optical microscopy, scanning electron microscopy, and fractographic morphology proved that uniform and fine equiaxed grains, evenly distributed Al2Cu second phase particles were formed during the CMT-PADV process. Furthermore, the X-ray diffraction test ascertained that the CMT-PADV sample had the smallest lattice parameter and the highest solute Cu content. Besides, the tensile strength could reach 283 MPa, the data scattering was the smallest, and the strength scattering of the sample in the horizontal direction was the shortest. In addition, the strength properties were nearly isotropic, with only 5 MPa difference in the vertical and horizontal directions. The above mentioned results indicated that the mechanical properties of 2219 aluminum alloy was improved using the CMT-PADV arc mode.

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Section: Resultsmentioning

confidence: 99%

Microstructure Evolution and Mechanical Behavior of 2219 Aluminum Alloys Additively Fabricated by the Cold Metal Transfer Process

Fang

Zhang²,

Li³

et al. 2018

Materials

100

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“…The results indicated that LSP could eliminate the negative effects induced via SLM and increase the tensile properties of SLM-fabricated samples. Sun et al [27] also reported that LSP treatment enhanced the tensile properties of 2319 aluminum alloy formed by wire arc AM. In the present work, CRS affected layer and grain refinement were achieved in the samples, which could be the dominant factor of tensile strength enhancement.…”

Section: Mechanical Propertiesmentioning

confidence: 95%

Effects of Laser Shock Peening on Microstructure and Properties of Ti–6Al–4V Titanium Alloy Fabricated via Selective Laser Melting

et al. 2020

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Laser shock peening (LSP) is an innovative surface treatment process with the potential to change surface microstructure and improve mechanical properties of additively manufactured (AM) parts. In this paper, the influences of LSP on the microstructure and properties of Ti–6Al–4V (Ti64) titanium alloy fabricated via selective laser melting (SLM), as an attractive AM method, were investigated. The microstructural evolution, residual stress distribution and mechanical properties of SLM-built Ti64 samples were characterized before and after LSP. Results show that the SLM sample was composed of single hcp α’ phase, which deviates from equilibrium microstructure at room temperature: α + β phases. The LSP significantly refines the grains of α’ phase and produces compressive residual stress (CRS) of maximum magnitude up to −180 MPa with a depth of 250 μm. Grain refinement of α’ phase is attributed to the complex interaction of dislocations and the intersection of deformation twinning subjected to LSP treatment. The main mechanism of strength and micro-hardness enhancement via LSP is ascribed to the effects of CRS and α’ phase grain refinement.

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“…Even though aluminium is one of the most widely used materials for WAAM and other AM techniques, there were no detailed investigations on the residual stress development available yet. Sun et al [18] deposited 2319 aluminium wire using WAAM technology, but only measured the stresses near the wall surface using hole drilling. Only Brice et al [19] used neutron diffraction to measure bulk stresses in electron beam AM using 2319 wire.…”

Section: Benefits Of Waam Are Dominantly the Cost Savings Through Redmentioning

confidence: 99%

Control of residual stress and distortion in aluminium wire + arc additive manufacture with rolling

Colegrove

Ganguly

Eimer

et al. 2018

Additive Manufacturing

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Rolling can control residual stress and distortion in aluminium Wire + Arc Additively Manufactured (WAAM) walls. It was applied both vertically to each deposited layer (inter-pass) and to the side of the wall after deposition is completed. Distortion was virtually eliminated with the vertical inter-pass method (unlike other metals) and inverted with side rolling. Neutron diffraction stress measurements show that the deposited wall contains constant tensile residual stresses along the build direction that reach the flow strength of the alloy in longitudinal direction. Vertical interpass rolling eliminates the distortion, but produces a multi-directional stress field, with hydrostatic compressive stresses approximately 2 mm below the top surface and hydrostatic tension 5-10 mm below the surface. Side rolling was even more effective in stress and distortion control and produced fairly uniform longitudinal compressive stresses along the wall height. An interesting by-product of the neutron diffraction measurements is the observation of a significantly larger FCC aluminium unit cell in the inter-pass rolled walls. This is a result of less copper in solid solution with the aluminium matrix, indicating greater precipitation which could have contributed to the material's improved strength.

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Microstructure, residual stress and tensile properties control of wire-arc additive manufactured 2319 aluminum alloy with laser shock peening

Cited by 270 publications

References 45 publications

Microstructure Evolution and Mechanical Behavior of 2219 Aluminum Alloys Additively Fabricated by the Cold Metal Transfer Process

Microstructure Evolution and Mechanical Behavior of 2219 Aluminum Alloys Additively Fabricated by the Cold Metal Transfer Process

Effects of Laser Shock Peening on Microstructure and Properties of Ti–6Al–4V Titanium Alloy Fabricated via Selective Laser Melting

Control of residual stress and distortion in aluminium wire + arc additive manufacture with rolling

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