Design and development of SS316L-IN718 functionally graded materials via laser powder bed fusion

Ghanavati, Reza; Lannunziata, Erika; Norouzi, Ehsan; Bagherifard, Sara; Iuliano, Luca; Saboori, Abdollah

doi:10.1016/j.matlet.2023.134793

Cited by 14 publications

(7 citation statements)

References 11 publications

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“…A strong <001> texture aligned with the building direction is observed across all specimens due to the predominant heat dissipation occurring through conduction to the substrate [ 20 ]. In addition, the EBSD results reveal a consistent epitaxial grain growth at the bi-metallic interface across varying compositional regions, owing to the shared crystal structure (FCC) and chemical composition of SS 316L and Inconel 625 alloy [ 29 ]. Within the 100 wt.% SS 316L region, the granular grains can be observed at the grain boundaries, representing ferrite phases.…”

Section: Resultsmentioning

confidence: 99%

Study on Optimization Strategy for the Composition Transition Gradient in SS 316L/Inconel 625 Functionally Graded Materials

Zhu,

Yu,

Yao

et al. 2024

Materials

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Wire arc additive manufacturing (WAAM) technology enables the fabrication of functionally graded materials (FGMs) by adjusting the wire feed speed of different welding wires in a layer-by-layer manner. This study aimed to produce SS 316L/Inconel 625 FGMs with varying transition compositions using dual-wire arc additive manufacturing (D-WAAM). An optimization strategy for transition gradients was implemented to exclude component regions that are prone to defect formation (notably cracking), as well as to retain other component regions, thereby enhancing the overall mechanical properties of FGMs. The study revealed grain boundary cracking and demonstrated the lowest microhardness and tensile properties within a 20 wt.% Inconel 625 transition gradient zone, which negatively impacts the overall mechanical properties of FGMs. Then, as the content of Inconel 625 in the first transition region increased, cracks disappeared, microhardness increased and better tensile properties were obtained. The most optimal mechanical properties were enriched at 50 wt.% Inconel 625 content. In conclusion, the compositional gradient optimization strategy proves efficacious in eliminating component regions with poor mechanical properties and microdefects, ensuring excellent overall mechanical characteristics of FGMs.

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Section: Resultsmentioning

confidence: 99%

Study on Optimization Strategy for the Composition Transition Gradient in SS 316L/Inconel 625 Functionally Graded Materials

Zhu,

Yu,

Yao

et al. 2024

Materials

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“…Hence, special measures are necessary for the design step, which will be discussed further. Table 2 summarizes the compatibility of different base alloys comparatively from three aspects of "intermetallic formation and solubility limitations," the "mismatch of thermal property," and "other metallurgical effects," based on the literature [71][72][73]. In an electrophotographic-based dual powders dispenser (Figure 19c), the powder particles are accurately placed on a cylindrical mesh via a micro-airflow, and the deposition process is carried out using a (laser) heat source by blowing them off the mesh onto the platform.…”

Section: Am Framework For Fgm Structuresmentioning

confidence: 99%

Section: Am Framework For Fgm Structuresmentioning

confidence: 99%

Untapped Opportunities in Additive Manufacturing with Metals: From New and Graded Materials to Post-Processing

Mosallanejad,

Ghanavati,

Behjat

et al. 2024

Metals

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Metal additive manufacturing (AM) is an innovative manufacturing method with numerous metallurgical benefits, including fine and hierarchical microstructures and enhanced mechanical properties, thanks to the utilization of a local heat source and the rapid solidification nature of the process. High levels of productivity, together with the ability to produce complex geometries and large components, have added to the versatile applicability of metal AM with applications already implemented in various sectors such as medicine, transportation, and aerospace. To further enhance the potential benefits of AM in the context of small- to medium-scale bulk production, metallurgical complexities should be determined and investigated. Hence, this review paper focuses on three significant metallurgical aspects of metal AM processes: in situ alloying, functionally graded materials, and surface treatments for AM parts. The current text is expected to offer insights for future research works on metal AM to expand its potential applications in various advanced manufacturing sectors.

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“…In the L-PBF method, to obtain integrated parts, a laser is used as a heat source to melt a thin metal powder layer spread by a recoating roller onto a building platform [9,10]. It is well documented that microstructure type and properties of as-built L-PBF parts mainly depend on the thermal history involved in the process due to rapid solidification (10 5 -10 7 K/s) [11,12]. This exotic thermal history can be attributed to process parameters such as laser power, laser scanning speed, hatching distance, scan strategy, building platform temperature, and layer thickness [13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Microstructure-induced anisotropic tribological properties of Sc-Zr modified Al–Mg alloy (Scalmalloy®) produced via laser powder bed fusion process

Abdi,

Salehi,

Fatemi

et al. 2023

Int J Adv Manuf Technol

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In this study, the correlation between the microstructure and tribological performance of Sc and Zr-modified Al–Mg alloy (Scalmalloy®) samples produced via laser powder bed fusion process was evaluated via a dry sliding Pin-on-Disc wear test under different planes, directions, and various normal applied loads. The results revealed a remarkable dependency of wear properties on the as-built microstructure so that different behaviors were observed along the scanning and building planes. The microstructural examination indicated the presence of bi-modal grains and finely shaped equiaxed grains observed in the building and scanning planes, respectively. Increasing the applied loads from 20 to 40 N led to a significant increase in the coefficient of friction (COF) while increasing the load from 40 to 60 N, slightly decreasing the COF for the studied samples. No dependency was found between the COF and the corresponding microstructure at the highest applied load. The anisotropic wear resistance and COF values were predominant at the lowest applied load. Due to tailored as-built microstructural features and different microhardness values, lower wear rates were noticed along the scanning plane for all applied loads. Under the 20 N applied load, however, the worn surface of the scanning plane showed a clearer and smoother surface compared to the building plane surfaces. Ultra-fine equiaxed grains along the scanning plane and columnar grains along the building plane were determined as the main factors creating anisotropic tribological behavior. The outcomes of this study can pave the way toward producing more wear-resistant surfaces and developing components for critical wear applications in as-built conditions with no need for expensive and time-consuming surface treatments.

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Design and development of SS316L-IN718 functionally graded materials via laser powder bed fusion

Cited by 14 publications

References 11 publications

Study on Optimization Strategy for the Composition Transition Gradient in SS 316L/Inconel 625 Functionally Graded Materials

Study on Optimization Strategy for the Composition Transition Gradient in SS 316L/Inconel 625 Functionally Graded Materials

Untapped Opportunities in Additive Manufacturing with Metals: From New and Graded Materials to Post-Processing

Microstructure-induced anisotropic tribological properties of Sc-Zr modified Al–Mg alloy (Scalmalloy®) produced via laser powder bed fusion process

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