Dual-metal laser powder bed fusion of iron- and cobalt-based alloys

Chadha, Kanwal; Tian, Yuan; Pasco, Jubert; Aranas, Clodualdo

doi:10.1016/j.matchar.2021.111285

Cited by 9 publications

(11 citation statements)

References 23 publications

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“…Additive manufacturing (AM) technology revolutionized the production of parts and components by enabling the fabrication of complex shapes and geometries in a layer-by-layer manner [1]. Among various AM techniques, metal AM has gained significant traction, with extensive research available on printing iron-, aluminum-, titanium-, cobalt-and nickel-based alloys [2][3][4][5][6][7]. Laser powder bed fusion (L-PBF) has emerged as the most common technique for manufacturing solid structural shapes with acceptable surface finish and precision.…”

Section: Introductionmentioning

confidence: 99%

Themomechanical Response of an Additively Manufactured Hybrid Alloy by Means of Powder Bed Fusion

Aranas Jr.,

Nyamuchiwa,

Chadha

et al. 2023

KEM

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The laser powder bed fusion (L-PBF) technique was utilized to manufacture a hybrid M789-N709 alloy by depositing M789 steel on wrought N709 steel. The tensile strength of the M789-N709 interface generated during the process has been established to be higher than that of the base materials. In the previous work of the current authors, extensive characterization of the M789-N709 interface (before and after heat treatment) was performed by means of electron backscatter diffraction, electron probe microanalysis, transmission electron microscopy with energy dispersive spectroscopy, and atom probe tomography analyses, to understand the mechanisms associated with its superior strength. In the present work, since the application of the hybrid alloy is targeted towards an elevated temperature environment, the individual high-temperature mechanical properties of M789 and N709 steels were acquired at various temperatures and strain rates using a Gleeble 563 thermomechanical system. Then, based on the flow curves, phenomenological-, and physical-based constitutive material models were established. These constitutive models can be utilized to accurately assess the high-temperature response of the hybrid alloy system using finite element analysis programs. This work demonstrates the application of thermomechanical processing and constitutive modeling in the field of metal additive manufacturing.

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Section: Introductionmentioning

confidence: 99%

Themomechanical Response of an Additively Manufactured Hybrid Alloy by Means of Powder Bed Fusion

Aranas Jr.,

Nyamuchiwa,

Chadha

et al. 2023

KEM

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“…An ultrasonic-assisted multi-material LPBF technology was developed by the team from The University of Manchester [10]. Chadha [11] investigated an iron-cobalt alloy system fabricated via LPBF. Goh et al [12] reported the recent progress of AM of multi-layered and multi-material electronics.…”

Section: Introductionmentioning

confidence: 99%

Abnormal interfacial bonding mechanisms of multi-material additive-manufactured tungsten–stainless steel sandwich structure

Wei

et al. 2022

Int. J. Extrem. Manuf.

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Tungsten (W) and stainless steel (SS) are well known for the high melting point and good corrosion resistance respectively. Bimetallic W-SS structures would offer potential applications in extreme environments. In this study, a SS→W→SS sandwich structure is fabricated via a special laser powder bed fusion (LPBF) method based on an ultrasonic-assisted powder deposition mechanism. Material characterization of the SS→W interface and W→SS interface was conducted, including microstructure, element distribution, phase distribution, and nano-hardness. A coupled modelling method, combining computational fluid dynamics modelling with discrete element method, simulated the melt pool dynamics and solidification at the material interfaces. The study shows that the interface bonding of SS→W (SS printed on W) is the combined effect of solid-state diffusion with different elemental diffusion rates and grain boundary diffusion. The keyhole mode of the melt pool at the W→SS (W printed on SS) interface makes the pre-printed SS layers repeatedly remelted, causing the liquid W to flow into the sub-surface of the pre-printed SS through the keyhole cavities realizing the bonding of the W→SS interface. The above interfacial bonding behaviours are significantly different from the previously reported bonding mechanism based on the melt pool convection during multiple material LPBF. The abnormal material interfacial bonding behaviours are reported for the first time.

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“…[6][7][8]. Even though the strength of maraging steel is high, still it lacks corrosion resistance, which acts as a bottleneck for various applications specially under harsh environments [9][10][11][12]. To overcome this, Voestalpine group developed a modified maraging steel which is commercially known as M789.…”

Section: Introductionmentioning

confidence: 99%

Role of Heat Treatment on the Texture Evolution of M789 Steel Developed by LPBF Process

Chadha

Tian

Spray

et al. 2022

DDF

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A laser powder bed fusion (LPBF) of M789 ally steel has been carried out using an EOS M290 machine. The ideal orientations of M789 alloy were established using an electron backscatter diffraction (EBSD) technique. The analysis through ideal orientation and ODF analysis pointed out that as the heat treatment temperature is increased, the texture becomes strong. Analysis done through recrystallization map concluded that as the heat treatment temperature increases, the recrystallized grains increase which clearly explains the reason for strong texture at high temperature heat treatment. The results from this work can be used to control the texture of the M789 alloy to improve various physical and mechanical properties of the material.

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Dual-metal laser powder bed fusion of iron- and cobalt-based alloys

Cited by 9 publications

References 23 publications

Themomechanical Response of an Additively Manufactured Hybrid Alloy by Means of Powder Bed Fusion

Themomechanical Response of an Additively Manufactured Hybrid Alloy by Means of Powder Bed Fusion

Abnormal interfacial bonding mechanisms of multi-material additive-manufactured tungsten–stainless steel sandwich structure

Role of Heat Treatment on the Texture Evolution of M789 Steel Developed by LPBF Process

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