Selective laser melting-wire arc additive manufacturing hybrid fabrication of Ti-6Al-4V alloy: Microstructure and mechanical properties

Shi, Xuezhi; Ma, Shuo; Liu, Changmeng; Wu, Qingyun; Lu, Jiping; Liu, Yude; Shi, Wentian

doi:10.1016/j.msea.2016.12.065

Cited by 121 publications

(50 citation statements)

References 39 publications

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“…According to the different heat sources, the current existence of the AM method consists of laser melting deposition [6,7], wire arc additive manufacturing [8,9], electron beam additive manufacturing [10]. Many researches have been done on the stainless steel using the AM method.…”

Section: Introductionmentioning

confidence: 99%

Microstructure and mechanical properties of 304L steel fabricated by arc additive manufacturing

Liu

et al. 2017

MATEC Web Conf.

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Abstract. For 304L large structural parts used in nuclear power, it is hard and costly to fabricate and machine traditionally. Wire arc additive manufacturing (WAAM) has low cost and high material utilization, which provides an efficient way to fabricate the large structural parts. So in this study, WAAM is used to fabricate the parts of 304L stainless steel. Through the tensile test and metallographic analysis, the mechanical properties and microstructure of the 304L stainless steel fabricated by WAAM were explored. The results indicate that with the layers depositing, the cooling rate becomes slower, the dendrites become thicker and the morphology becomes more stable. Due to the existence of dendrites, the grain boundary strengthening effect is different between the transverse direction and longitudinal direction, and resulting in anisotropy of mechanical properties. However, the mechanical properties of the parts correspond to the forged piece, which lays the foundation for future applications.

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Section: Introductionmentioning

confidence: 99%

Microstructure and mechanical properties of 304L steel fabricated by arc additive manufacturing

Liu

et al. 2017

MATEC Web Conf.

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“…It can be concluded that the inclination and diameter have no significant impacts on the mechanical properties of the rod element. The mechanical property of Ti-6Al-4V is directly determined by their microstructure [30][31][32]. There are three important factors affect the mechanical property including the size of β grains, the β grain orientation and the lamellar α microstructure.…”

Section: Eitce 2017mentioning

confidence: 99%

“…There are three important factors affect the mechanical property including the size of β grains, the β grain orientation and the lamellar α microstructure. In the sample manufactured by SLM, the anisotropy of mechanical properties primarily depends on the deference of the β grain orientation [31]. For the small rod unit of lattice structure, the molten pool is very tiny, and the cooling rate is high.…”

Section: Eitce 2017mentioning

confidence: 99%

Investigation on Mechanical Properties’ Anisotropy of Rod Units in Lattice Structures Fabricated by Selective Laser Melting

Jing

Yong

et al. 2017

MATEC Web Conf.

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Abstract. Lattice structure with high strength and low mass using selective laser melting (SLM) has been a hot topic. However, there are some problems in the fabrication of lattice structure by SLM. Rod unit is the basic component of lattice structure and its performance affects the whole structure. It is necessary to investigate the influence of selective laser melting on rod unit's mechanical properties. A series of rod units with different inclination angle and diameter were fabricated by SLM in this research. And the mechanical properties of these units were measured by tensile test. The results show that the rod units with different diameters and inclination angles have good mechanical properties and show no difference. It is a good news for lattice structure designing for there is no necessary to consider the mechanical properties' anisotropy of rod units.

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“…Compared with powder, using wire as the feedstock form has the great advantages of high efficiency, low cost and simple handling and storage storage operation during the manufacturing process [9,10]. Therefore, it has received more attentions in recent research activities [11][12][13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

“…storage operation during the manufacturing process [9,10]. Therefore, it has received more attentions in recent research activities [11][12][13][14][15][16]. LAM with wire feeding can be divided into vertical wire feeding and paraxial wire feeding [9,17].…”

Section: Introductionmentioning

confidence: 99%

Microstructure and Mechanical Properties of Ti-6Al-4V Fabricated by Vertical Wire Feeding with Axisymmetric Multi-Laser Source

Gong

Zhang

et al. 2017

Applied Sciences

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Vertical wire feeding with an axisymmetric multi-laser source (feeding the wire vertically into the molten pool) has exhibited great advantages over LAM (laser additive manufacturing) with paraxial wire feeding, which has an anisotropic forming problem in different scanning directions. This paper investigates the forming ability of vertical wire feeding with an axisymmetric multi-laser source, and the microstructure and mechanical properties of the fabricated components. It has been found that vertical wire feeding with an axisymmetric multi-laser source has a strong forming ability with no anisotropic forming problem when fabricating the complex parts in a three-axis machine tool. Most of the grains in the samples are equiaxed grains, and a small amount of short columnar grains exist which are parallel to each other. The microstructure of the fabricated samples exhibits a fine basket-weave structure and martensite due to the fast cooling rate which was caused by the small size of the molten pool and the additional heat dissipation from the feeding wire. The static tensile test shows that the average ultimate tensile strength is 1140 MPa in the scanning direction and 1115 MPa in the building direction, and the average elongation is about 6% in both directions.

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Selective laser melting-wire arc additive manufacturing hybrid fabrication of Ti-6Al-4V alloy: Microstructure and mechanical properties

Cited by 121 publications

References 39 publications

Microstructure and mechanical properties of 304L steel fabricated by arc additive manufacturing

Microstructure and mechanical properties of 304L steel fabricated by arc additive manufacturing

Investigation on Mechanical Properties’ Anisotropy of Rod Units in Lattice Structures Fabricated by Selective Laser Melting

Microstructure and Mechanical Properties of Ti-6Al-4V Fabricated by Vertical Wire Feeding with Axisymmetric Multi-Laser Source

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