The Microstructural Revolution of Ti-6Al-4V Specimens Fabricated by Selective Laser Sintering of Pre-alloyed Powders

Nguyen, Thuyet Minh; Nguyen, Viet Hoang; Kim, Jin-Chun

doi:10.15625/2525-2518/57/3a/13941

Cited by 3 publications

(1 citation statement)

References 14 publications

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“…Recently, some Vietnamese research teams have paid their attention on metallic AM technologies. Nguyen et al [12] studied the microstructure and other properties of Ti6Al4V samples produced by selective laser sintering (SLS) technology. Le et al [13] used an industrial GMAW robot to build successfully thinwalled 308L steel components according to the WAAM process.…”

Section: Introductionmentioning

confidence: 99%

Effects of Welding Current on the Shape and Microstructure Formation of Thin-Walled Low-Carbon Parts Built by Wire Arc Additive Manufacturing

Le¹,

Hoang²,

Tran³

et al. 2020

JST

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Wire arc additive manufacturing (WAAM) is nowadays gaining much attention from both the academic and industrial sectors for the manufacture of medium and large dimension metal parts because of its high deposition rate and low costs of equipment investment. In the literature, WAAM has been extensively investigated in terms of the shape and dimension accuracy of built parts. However, limited research has focused on the effects of welding parameters on the microstructural characteristics of parts manufactured by this process. In this paper, the effects of welding current in the WAAM process on the shape and the microstructure formation of built thin-walled low-carbon steel components were studied. For this purpose, the thin-walled low-carbon steel samples were built layer-by-layer on the substrates by using an industrial gas metal arc welding robot with different levels of welding current. The shape, microstructures and mechanical properties of built samples were then analyzed. The obtained results show that the welding current plays an important role in the shape stability, but does not significantly influence on the microstructure formation of built thin-walled samples. The increase of the welding current only leads to coarser grain size and resulting in decreasing the hardness of built materials in each zone of the built sample. The mechanical properties (hardness and tensile properties) of the WAAM-built thin-walled low-carbon steel parts are also comparable to those of wrought low-carbon steel, and to be adequate with real applications.

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Section: Introductionmentioning

confidence: 99%

Effects of Welding Current on the Shape and Microstructure Formation of Thin-Walled Low-Carbon Parts Built by Wire Arc Additive Manufacturing

Le¹,

Hoang²,

Tran³

et al. 2020

JST

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A comprehensive study on fused filament fabrication of Ti-6Al-4V structures

Zhang

Bai

Riede

et al. 2020

Additive Manufacturing

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Properties of the interface between the as-built Ti–6Al–4V sample and the Ti substrate in selective laser sintering

Nguyen

Việt

et al. 2020

Int. J. Mod. Phys. B

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In this paper, selective laser sintering (SLS) was applied to join two materials by printing Ti–6Al–4V powder on a Ti substrate without any support parts. The characteristics of the interface between the as-built Ti–6Al–4V sample and the substrate were investigated. The analysis indicates that a heat-affected zone (HAZ) and the fish-scale type were formed at the joining area. The combination of smaller grains, acicular [Formula: see text] martensite, and lamellar [Formula: see text] structures was observed inside the interface zone. The hardness value at the interface area was measured by about 320 HV which is higher than 280 HV of the substrate and smaller than 369 HV of the as-built sample. The results predict that the SLS process is a promising method for manufacturing of hybrid materials.

show abstract

The Microstructural Revolution of Ti-6Al-4V Specimens Fabricated by Selective Laser Sintering of Pre-alloyed Powders

Cited by 3 publications

References 14 publications

Effects of Welding Current on the Shape and Microstructure Formation of Thin-Walled Low-Carbon Parts Built by Wire Arc Additive Manufacturing

Effects of Welding Current on the Shape and Microstructure Formation of Thin-Walled Low-Carbon Parts Built by Wire Arc Additive Manufacturing

A comprehensive study on fused filament fabrication of Ti-6Al-4V structures

Properties of the interface between the as-built Ti–6Al–4V sample and the Ti substrate in selective laser sintering

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