Solidification and microstructure evolution in additively manufactured H13 steel via directed energy deposition: Integrated experimental and computational approach

Joshi, Sameehan S.; Sharma, Shashank; Mazumder, Sangram; Pantawane, Mangesh V.; Dahotre, Narendra B.

doi:10.1016/j.jmapro.2021.06.009

Cited by 31 publications

(10 citation statements)

References 41 publications

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“…Figure 2 b illustrates the schematic representation of the longitudinal cross-section of the computational domain. A quiet element activation/deactivation strategy was employed to incorporate the multi-layer deposition 50 , 51 . For any given point during deposition, the material preceding the moving tool area corresponds to deposited material.…”

Section: Methodsmentioning

confidence: 99%

A multi modal approach to microstructure evolution and mechanical response of additive friction stir deposited AZ31B Mg alloy

Joshi

Sharma

Radhakrishnan

et al. 2022

Sci Rep

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Current work explored solid-state additive manufacturing of AZ31B-Mg alloy using additive friction stir deposition. Samples with relative densities ≥ 99.4% were additively produced. Spatial and temporal evolution of temperature during additive friction stir deposition was predicted using multi-layer computational process model. Microstructural evolution in the additively fabricated samples was examined using electron back scatter diffraction and high-resolution transmission electron microscopy. Mechanical properties of the additive samples were evaluated by non-destructive effective bulk modulus elastography and destructive uni-axial tensile testing. Additively produced samples experienced evolution of predominantly basal texture on the top surface and a marginal increase in the grain size compared to feed stock. Transmission electron microscopy shed light on fine scale precipitation of Mg$$_{17}$$ 17 Al$$_{12}$$ 12 within feed stock and additive samples. The fraction of Mg$$_{17}$$ 17 Al$$_{12}$$ 12 reduced in the additively produced samples compared to feed stock. The bulk dynamic modulus of the additive samples was slightly lower than the feed stock. There was a $$\sim\,$$ ∼ 30 MPa reduction in 0.2% proof stress and a 10–30 MPa reduction in ultimate tensile strength for the additively produced samples compared to feed stock. The elongation of the additive samples was 4–10% lower than feed stock. Such a property response for additive friction stir deposited AZ31B-Mg alloy was realized through distinct thermokinetics driven multi-scale microstructure evolution.

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Section: Methodsmentioning

confidence: 99%

A multi modal approach to microstructure evolution and mechanical response of additive friction stir deposited AZ31B Mg alloy

Joshi

Sharma

Radhakrishnan

et al. 2022

Sci Rep

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“…The material experiences fast heating followed by melting and sever quenching resulting from the surface radiative heat losses and rapid heat extraction from the bulk of the material due to conduction. Melting generates surface oscillations in the liquid layer as a result of melt pool convection, capillary, and thermo-capillary effects [53,54]. These oscillations are rapidly solidified resulting in generation of surface roughness/texture.…”

Section: Surface Melting/texturingmentioning

confidence: 99%

“…The main beam based methods include laser powder bed fusion where the layer of powder is spread on to a build platform and laser is scanned at the selective location based on the input design file [75] (Fig. 14a); and laser directed energy deposition where the powder is dispensed in the path of laser beam with the aid of an inert gas and the beam is rastered to deposit a layer [54] (Fig. 14b).…”

Section: Beam Based Additive Manufacturingmentioning

confidence: 99%

Tailored Surfaces on Biomedical Magnesium Alloys via Novel Beam and Friction Based Manufacturing Processes: A Review

Joshi

Dahotre

2022

Biomedical Materials & Devices

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Magnesium based alloys are attractive materials for biomedical applications as a result of their similar properties to the human bone and vital nature of the Mg ions during various functions of the human body. However, these materials suffer from poor corrosion resistance in chloride containing physiological environments. As a result, surface modification of biomedical alloys is needed to not only enhance the corrosion resistance but also biointegration characteristics. The current review article mainly focuses on beam and friction stir based techniques for surface processing of biomedical Mg alloys and composites. Each technique is further divided into sub-methods. Under the beam based processing, surface melting and bioceramic coating synthesis are discussed in detail. In the case of friction based methods, friction stir processing for grain refinement and techniques of surface modification to produce surface bioceramic composites are discussed. Furthermore, latest developments in the area of beam as well as friction stir additive manufacturing of biomedical Mg alloys and composites are elucidated. Lastly, possible directions for future progress and scaling up the lab level developments to actual applications in these materials processing areas for biomedical Mg alloys are provided.

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“…[11][12][13] Among various AM techniques, laserbased directed energy deposition (L-DED) is a unique and widely used fusion process capable of fabricating 3D3D, near-net-shaped free-standing metallic components and coating/cladding an existing metallic component. [14][15][16][17] With this technique, CoCrMo alloys can be easily fabricated owing to its superior weldability and precursor (powder/wire) availability. [18][19][20] Previously, L-DED deposition of fully dense and metallurgically sound CoCrMo with properties comparable with those fabricated using conventional processes like casting has been reported.…”

Section: Introductionmentioning

confidence: 99%

Thermokinetically Driven Microstructural Evolution in Laser‐Based Directed Energy‐Deposited CoCrMo Biomedical Alloy

et al. 2022

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The present work investigated additive manufacturing of CoCrMo alloy via laser‐based directed energy deposition process. A range of five different laser powers are used for the fabrication of fully dense and metallurgically sound CoCrMo samples. The solidification parameters including temperature gradient, growth rate, and the cooling rate are computationally predicted in each case, using a multitrack multilayer model. The variation in these computationally predicted solidification parameters with the different laser powers used in fabrication is linked to the evolution of microstructural features within the laser additively deposited CoCrMo samples. Evolution of ε‐hexagonally close‐packed (HCP) martensites from γ‐face‐centered cubic (FCC) phase, along with variation in thickness of these martensitic laths with respect to the varying solidification parameters associated with the laser additive deposition, is identified and investigated. The multitrack, multilayer thermokinetic model not only provides the spatial and temporal signatures of laser‐based directed energy deposited process, but uniquely considers the influence of pre‐ and postheating on microstructural evolution with their correlation with experimental observations.

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Solidification and microstructure evolution in additively manufactured H13 steel via directed energy deposition: Integrated experimental and computational approach

Cited by 31 publications

References 41 publications

A multi modal approach to microstructure evolution and mechanical response of additive friction stir deposited AZ31B Mg alloy

A multi modal approach to microstructure evolution and mechanical response of additive friction stir deposited AZ31B Mg alloy

Tailored Surfaces on Biomedical Magnesium Alloys via Novel Beam and Friction Based Manufacturing Processes: A Review

Thermokinetically Driven Microstructural Evolution in Laser‐Based Directed Energy‐Deposited CoCrMo Biomedical Alloy

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