A functionally graded material design from stainless steel to Ni-based superalloy by laser metal deposition coupled with thermodynamic prediction

Kun Li; Jianbin Zhan; Ming Zhang; Ruijin Ma; Qian Tang; David Z. Zhang; Lawrence E. Murr; Huajun Cao

Materials & Design (May 2022)

A functionally graded material design from stainless steel to Ni-based superalloy by laser metal deposition coupled with thermodynamic prediction

Kun Li,
Jianbin Zhan,
Ming Zhang,
Ruijin Ma,
Qian Tang,
David Z. Zhang,
Lawrence E. Murr,
Huajun Cao

Affiliations

Kun Li: State Key Laboratory of Mechanical Transmission, Chongqing University, Chongqing 400044, China; Chongqing Key Laboratory of Metal Additive Manufacturing (3D Printing), Chongqing University, Chongqing 400044, China; College of Mechanical and Vehicle Engineering, Chongqing University, Chongqing 400044, China; Corresponding authors.
Jianbin Zhan: Chongqing Key Laboratory of Metal Additive Manufacturing (3D Printing), Chongqing University, Chongqing 400044, China; College of Mechanical and Vehicle Engineering, Chongqing University, Chongqing 400044, China
Ming Zhang: Chongqing Key Laboratory of Metal Additive Manufacturing (3D Printing), Chongqing University, Chongqing 400044, China; College of Mechanical and Vehicle Engineering, Chongqing University, Chongqing 400044, China
Ruijin Ma: Chongqing Key Laboratory of Metal Additive Manufacturing (3D Printing), Chongqing University, Chongqing 400044, China; College of Mechanical and Vehicle Engineering, Chongqing University, Chongqing 400044, China
Qian Tang: State Key Laboratory of Mechanical Transmission, Chongqing University, Chongqing 400044, China; Chongqing Key Laboratory of Metal Additive Manufacturing (3D Printing), Chongqing University, Chongqing 400044, China; College of Mechanical and Vehicle Engineering, Chongqing University, Chongqing 400044, China
David Z. Zhang: State Key Laboratory of Mechanical Transmission, Chongqing University, Chongqing 400044, China; Chongqing Key Laboratory of Metal Additive Manufacturing (3D Printing), Chongqing University, Chongqing 400044, China; College of Engineering, Mathematics and Physical Sciences, University of Exeter, North Park Road, Exeter EX4 4QF, UK
Lawrence E. Murr: W.M. Keck Center for 3D Innovation, University of Texas at El Paso, El Paso, TX 79968, USA; Department of Metallurgical, Materials and Biomedical Engineering, The University of Texas at El Paso, El Paso, TX 79968, USA; Corresponding authors.
Huajun Cao: State Key Laboratory of Mechanical Transmission, Chongqing University, Chongqing 400044, China; College of Mechanical and Vehicle Engineering, Chongqing University, Chongqing 400044, China

Journal volume & issue: Vol. 217
p. 110612

Abstract

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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.

Published in Materials & Design

ISSN: 0264-1275 (Print); 1873-4197 (Online)
Publisher: Elsevier
Country of publisher: United Kingdom
LCC subjects: Technology: Electrical engineering. Electronics. Nuclear engineering: Materials of engineering and construction. Mechanics of materials
Website: https://www.journals.elsevier.com/materials-and-design

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