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03051nam a2200481Ia 4500 |
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10.1016-j.matdes.2022.110612 |
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220510s2022 CNT 000 0 und d |
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|a 02641275 (ISSN)
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|a A functionally graded material design from stainless steel to Ni-based superalloy by laser metal deposition coupled with thermodynamic prediction
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| 260 |
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|b Elsevier Ltd
|c 2022
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| 856 |
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|z View Fulltext in Publisher
|u https://doi.org/10.1016/j.matdes.2022.110612
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|a Extreme performance requirements are demanding materials with functional microstructure and properties. Additive manufacturing (AM) is an efficient method to fabricate functionally graded materials (FGMs) with gradually variable composition and structures as a function of position. In this work, a powder-based laser directed energy deposition (LDED) process was carried out to develop a series of compositionally graded joints from 316 stainless steel to Inconel 718 alloy. The microstructure, composition, precipitation transformation and mechanical properties were investigated as a function of position in FGMs via experimental characterization and computational analysis. The 75 wt% IN718 component with fine and equiaxial grains is directly obtained from the laser deposition. The diffusion and segregation of Ni, Nb and Ti elements underly the transformation mechanism between Laves, NbNi3/δ, γ'' and γ'' phases during aging, which has a high consistency with the computational prediction. The precipitation transformation has a close relationship with the final mechanical properties of the FGM. The computational-experimental approach is a promising method to tune the microstructure-property relationship of dissimilar metal joints. The gradient precipitation that can be flexibly tuned by LDED process provides a high throughput design to develop new functional materials with local tailoring of properties. © 2022 The Authors
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|a Deposition
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|a Deposition process
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|a Directed energy
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|a Energy depositions
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|a Functional materials
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|a Functionally graded materials
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|a Functionally graded materials
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|a High throughput design
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|a High throughput design
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|a High-throughput
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|a Laser directed energy deposition
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|a Laser directed energy deposition
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|a Materials design
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|a Microstructure
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|a Microstructure-property relationship
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|a Microstructure-property relationships
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|a Ni-based superalloys
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|a Nickel alloys
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|a Precipitation (chemical)
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|a Precipitation behavior
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|a Precipitation behaviour
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|a Superalloys
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|a Cao, H.
|e author
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|a Li, K.
|e author
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|a Ma, R.
|e author
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|a Murr, L.E.
|e author
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|a Tang, Q.
|e author
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|a Zhan, J.
|e author
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|a Zhang, D.Z.
|e author
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|a Zhang, M.
|e author
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| 773 |
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|t Materials and Design
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