Bimetal printing of high entropy alloy/metallic glass by laser powder bed fusion additive manufacturing

Wang, Hao; Chen, Junquan; Luo, Hailu; Wang, Di; Song, Chengli; Yao, Xiyu; Chen, Peng; Yan, Ming

doi:10.1016/j.intermet.2021.107430

Cited by 12 publications

(1 citation statement)

References 34 publications

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“…Design plays a critical role in maximizing corrosion resistance. The LPBF process allows engineers to design complex geometries with internal channels and lattice structures that facilitate fluid flow and reduce stagnant zones where corrosion can initiate [ 22 , 23 ]. Moreover, functionally graded materials (FGMs) can be designed, where the composition gradually changes from one metal to another, resulting in a smooth transition of properties and enhanced corrosion resistance.…”

Section: Introductionmentioning

confidence: 99%

Interface Hardness Analysis of between IN625 and CoCrMo Manufactured by Pulsed Wave Laser Powder Bed Fusion

Hoo,

Xiao,

Yao

et al. 2024

Micromachines

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The nuclear and petrochemical industries often require multi-metal parts that are corrosion-resistant, heat-resistant, and possess high strength to enhance equipment safety and reduce downtime. Additive manufacturing technology enables the rapid and flexible processing of multi-metal parts to meet these stringent demands. This study is aimed at investigating the interface hardness between CoCrMo/IN625 to determine optimal processing parameters that can be utilized in manufacturing reliable and durable multi-metal parts. The result indicates that when the volumetric energy density, Ev, is at or below 20 J/mm3, microfluidic forces are unable to sufficiently diffuse between the two metals, leading to insufficient diffusion, and the high hardness CoCrMo acts as a support, resulting in a significantly higher interface hardness. As Ev increases, intense recoil pressure within the microfluidic forces disrupts the melt pool, allowing for full diffusion between the two metals. The fully diffused high-hardness CoCrMo has been diluted by the low-hardness IN625, thus reducing the interface hardness. Considering the interface hardness, strength, and printing efficiency (time and energy consumption), we recommend a range of 35 J/mm3 < Ev ≤ 75 J/mm3. In this range, the average values for interface hardness and tensile strength of the samples are approximately 382 HV and 903 MPa, respectively.

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Section: Introductionmentioning

confidence: 99%