Effects of micrometer-sized TiB2 on crack mitigation, mechanical and electrochemical performance of a Ni-based alloy fabricated by selective laser melting

Yang, Shengzhao; Han, Quanquan; Yin, Yingyue; Gao, Jian; Zhang, Zhenhua; Gu, Yalong; Low, Kenny

doi:10.1016/j.optlastec.2021.107240

Cited by 36 publications

(4 citation statements)

References 41 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Generally, partially melted powder particles may increase the melting pool's dynamic viscosity coefficient during the rapid melting process. Higher viscosity makes it arduous for the viscous molten liquid to fill voids caused by escaping gases, resulting in open-pore development (Yang et al , 2021). The presence of moisture on the surface of powder particles may also cause pores.…”

Section: Resultsmentioning

confidence: 99%

The influence of laser power and scanning speed on the microstructure and surface morphology of Cu2O parts in SLM

Ullah

Rehman

Salamcı

et al. 2022

RPJ

View full text Add to dashboard Cite

Purpose This paper aims to reduce part defects and improve ceramic additive manufacturing (AM). Selective laser melting (SLM) experiments were carried out to explore the effect of laser power and scanning speed on the microstructure, melting behaviour and surface roughness of cuprous oxide (Cu2O) ceramic. Design/methodology/approach The experiments were designed based on varying laser power and scanning speed. The laser power was changed between 50 W and 140 W, and the scanning speed was changed between 170 mm/s and 210 mm/s. Other parameters, such as scanning strategy, layer thickness and hatch spacing, remain constant. Findings Laser power and scan speed are the two important laser parameters of great significance in the SLM technique that directly affect the molten state of ceramic powders. The findings reveal that Cu2O part defects are widely controlled by gradually increasing the laser power to 110 W and reducing the scanning speed to 170 mm/s. Furthermore, excessive laser power (>120 W) caused surface roughness, cavities and porous microstructure due to the extremely high energy input of the laser beam. Originality/value The SLM technique was used to produce Cu2O ceramic specimens. SLM of oxide ceramic became feasible using a slurry-based approach. The causes of several part defects such as spattering effect, crack initiation and propagation, the formation of porous microstructure, surface roughness and asymmetrical grain growth during the SLM of cuprous oxide (Cu2O) are thoroughly investigated.

show abstract

Section: Resultsmentioning

confidence: 99%

The influence of laser power and scanning speed on the microstructure and surface morphology of Cu2O parts in SLM

Ullah

Rehman

Salamcı

et al. 2022

RPJ

View full text Add to dashboard Cite

show abstract

“…Distinct variations in grain size and grain boundary distribution may have existed in different regions, causing different ductile and brittle properties in local areas, which, in turn, resulted in a mixed mode of ductile and brittle fracture. As a result, the SLM process frequently exhibited mixed fracture modes in selective laser melting [57,58].…”

Section: Tensile Propertiesmentioning

confidence: 99%

Influence of Scanning Strategy and Post-Treatment on Cracks and Mechanical Properties of Selective-Laser-Melted K438 Superalloy

Zhang,

Yan,

Xia

et al. 2024

Coatings

View full text Add to dashboard Cite

The feasibility of manufacturing high-performance components with complex structures is limited due to cracks in some superalloys fabricated by selective laser melting (SLM). By controlling the main process parameters such as scanning strategy, the adverse effects of cracks can be effectively reduced. In this paper, the effects of two different SLM scanning strategies with island and ‘back-and-forth’ and post-heat treatment on the cracks and mechanical properties of selective-laser-melted (SLMed) K438 alloy were investigated. The results show that the SLM method of the ‘back-and-forth’ scanning strategy had better lap and interlayer rotation angles and a more uniform distribution of laser energy compared with the island scanning strategy. The residual stress accumulation was reduced and crack formation was inhibited under this scanning strategy owing to the cooling and shrinkage process. In addition, the dislocation motion was hindered by the formation of uniformly dispersed MC carbides and γ’ phases during the SLM K438 alloy process, which resulted in the density of the as-built SLMed K438 alloy being up to 99.34%, the hardness up to 9.6 Gpa, and the tensile strength up to 1309 MPa. After post-heat treatment, the fine secondary γ’ phases were precipitated and dispersed uniformly in the Ni matrix, which effectively improved the Young’s modulus and tensile strength of the alloy by dispersing the stress-concentrated area.

show abstract

“…Selective laser melting has been widely adopted for the fabrication of aerospace components using nickel-based superalloys, steels, and titanium-based alloy materials [ 95 , 96 ]. This technique turns prototypes into functional hardware fabricated from the same material as production components.…”

Section: Reported Am Processes Utilized For Fabrication Of Titanium-b...mentioning

confidence: 99%

Additive manufacturing of titanium-based alloys- A review of methods, properties, challenges, and prospects

Tshephe

Akinwamide

Olevsky

et al. 2022

Heliyon

125

View full text Add to dashboard Cite

Effects of micrometer-sized TiB2 on crack mitigation, mechanical and electrochemical performance of a Ni-based alloy fabricated by selective laser melting

Cited by 36 publications

References 41 publications

The influence of laser power and scanning speed on the microstructure and surface morphology of Cu2O parts in SLM

The influence of laser power and scanning speed on the microstructure and surface morphology of Cu2O parts in SLM

Influence of Scanning Strategy and Post-Treatment on Cracks and Mechanical Properties of Selective-Laser-Melted K438 Superalloy

Additive manufacturing of titanium-based alloys- A review of methods, properties, challenges, and prospects

Contact Info

Product

Resources

About