Microstructure Evolution of an Al-Si Alloy During Shear-vibration Coupling Sub-rapid Solidification and the Effects of Processing Parameters

Zhang, Zongxu; Chen, Tijun; Xue, Hansong; Bi, Guangli; Ma, Ying; Guan, Ren Guo

doi:10.1007/s40962-022-00809-6

Cited by 6 publications

(1 citation statement)

References 46 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Particularly, RSP-based metal additive manufacturing (AM) techniques, such as uniform droplet spraying (UDS) [1][2][3][4], laser powder bed fusion [5][6][7], and direct energy deposition [8][9][10], have attracted significant attention in recent years due to their exceptional design flexibility and rapid prototyping capability. The microstructure and properties of AM-fabricated metallic parts are closely connected to the equilibrium thermodynamics of solidification and/or non-equilibrium kinetics in RSP [11,12]. Therefore, the understanding of the process-microstructure-property relationship in these RSP-based AM processes is essential for the purpose of off-line material design, real-time process control, and property optimization.…”

Section: Introductionmentioning

confidence: 99%

Uniform Droplet Spraying of Magnesium Alloys: Modeling of Apollonian Fractal Structures on Micrograph Sections

Liao

Kostoglou

Rebholz

et al. 2023

JMMP

View full text Add to dashboard Cite

A variety of advanced manufacturing processes have been developed based on the concept of rapid solidification processing (RSP), such as uniform droplet spraying (UDS) for the additive manufacturing of metals and alloys. This article introduces a morphological simulation of fractal dendric structures deposited by UDS of magnesium (Mg) alloys on two-dimensional (2D) planar sections. The fractal structure evolution is modeled as Apollonian packs of generalized ellipsoidal domains growing out of nuclei and dendrite arm fragments. The model employs descriptions of the dynamic thermal field based on superposed Green’s/Rosenthal functions with source images for initial/boundary effects, along with alloy phase diagrams and the classical solidification theory for nucleation and fragmentation rates. The initiation of grains is followed by their free and constrained growth by adjacent domains, represented via potential fields of level-set methods, for the effective mapping of the solidified topology and its metrics (grain size and fractal dimension of densely packed domains). The model is validated by comparing modeling results against micrographs of three UDS-deposited Mg–Zn–Y alloys. The further evolution of this real-time computational model and its application as a process observer for feedback control in 3D printing, as well as for off-line material design and optimization, is discussed.

show abstract

Section: Introductionmentioning

confidence: 99%

Uniform Droplet Spraying of Magnesium Alloys: Modeling of Apollonian Fractal Structures on Micrograph Sections

Liao

Kostoglou

Rebholz

et al. 2023

JMMP

View full text Add to dashboard Cite

show abstract

Microstructure Evolution During Rheoprocessing of A356 Al Alloy Using Cooling Slope

Das

2022

Inter Metalcast

View full text Add to dashboard Cite

Primary Phase Morphology of Cooling Slope-Processed A356 Al Alloy and Its Effect on Rheological Properties

Das

2022

Inter Metalcast

View full text Add to dashboard Cite

Microstructure Evolution of an Al-Si Alloy During Shear-vibration Coupling Sub-rapid Solidification and the Effects of Processing Parameters

Cited by 6 publications

References 46 publications

Uniform Droplet Spraying of Magnesium Alloys: Modeling of Apollonian Fractal Structures on Micrograph Sections

Uniform Droplet Spraying of Magnesium Alloys: Modeling of Apollonian Fractal Structures on Micrograph Sections

Microstructure Evolution During Rheoprocessing of A356 Al Alloy Using Cooling Slope

Primary Phase Morphology of Cooling Slope-Processed A356 Al Alloy and Its Effect on Rheological Properties

Contact Info

Product

Resources

About