Journal ArticleDOI
Structural integrity and mechanical properties of the functionally graded material based on 316L/IN718 processed by DED technology
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TLDR
In this article, a detailed investigation of mechanical and structural properties of FGC consisting of stainless steel 316L and Inconel 718 processed by Blown Powder Directed Energy Deposition system was carried out.Abstract:
Additive manufacturing is a one of the most promising technology nowadays that offers the advantages not only in building products of complex shapes but also of complex materials. A complex structure is characteristic for Functionally Graded Composites, which basics, principles and applicability have been widely investigated over the last years. The present study is focused on the detailed investigation of mechanical and structural properties of FGC consisting of stainless steel 316L and Inconel 718 processed by Blown Powder Directed Energy Deposition system. Mechanical properties within single layers and over layers transitions were investigated with the use of tensile tests and fracture toughness tests. Metallographic and fractographic investigations were carried out. Metallographic investigation revealed the differences in the interfaces between single material layers, nucleation processes and subsequent growth of the grains of the used materials. It has been shown that the formation of transition region between deposited single material layers is dependent on the order of material deposition since different deposition parameters are used for certain material. Evaluation of the tensile properties showed that the mechanical properties of a single material layers are in very good agreement regardless of the deposition height. However, the types of interfaces considering to the results of fractographic observations affect the tensile performance of the Functionally Graded Composite. The fracture toughness test results demonstrate changes in the mechanism of crack propagation at the interface between materials with respect to the type of transition. Furthermore, the material layers interfaces turned out to be the weakest points of the Functionally Graded Composite.read more
Citations
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Journal ArticleDOI
A Functionally Graded Material Design from Stainless Steel to Ni-Based Superalloy by Laser Metal Deposition Coupled with Thermodynamic Prediction
Kun Li,Jian-Bin Zhan,Ming Zhe Zhang,Ruijin Ma,Qian Tang,David Z. Zhang,Lawrence E Murr,Huajun Cao +7 more
Journal ArticleDOI
A functionally graded material design from stainless steel to Ni-based superalloy by laser metal deposition coupled with thermodynamic prediction
None Simon Schlauri,Owen Hughes +1 more
TL;DR: In this paper , 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.
Journal ArticleDOI
Insight into the interfacial architecture of a hybrid additively- manufactured stainless steel/Ni-based superalloy bimetal
TL;DR: In this paper , a crack-free and lamella-like interfacial architecture in the transition region of a stainless steel/Ni-based superalloy bimetal conjugated by laser directed energy deposition was obtained.
Journal ArticleDOI
The influence of laser power on the interfaces of functionally graded materials fabricated by powder-based directed energy deposition
Journal ArticleDOI
Fracture characterisation of vertically build functionally graded 316L stainless steel with Inconel 718 deposited by directed energy deposition process
TL;DR: In this paper , the authors deal with the fabrication of a graded material based on 316L and IN718 in combination with vertically oriented interfaces between single materials zones, where critical defects were observed in the microstructure as a result of solidification cracking.
References
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Journal ArticleDOI
Additive manufacturing of metallic components – Process, structure and properties
Tarasankar Debroy,Huiliang Wei,J.S. Zuback,T. Mukherjee,John W. Elmer,John O. Milewski,Allison M. Beese,Alexander E. Wilson-Heid,Amitava De,Wei Zhang +9 more
TL;DR: A review of the emerging research on additive manufacturing of metallic materials is provided in this article, which provides a comprehensive overview of the physical processes and the underlying science of metallurgical structure and properties of the deposited parts.
Book
The science and engineering of materials
TL;DR: This paper provided an understanding of the relationship between structure, processing, and properties of materials, and provided a general overview, focusing on mechanical behavior, or focusing on physical properties, by selecting the appropriate topics from this wealth of material.
Journal ArticleDOI
Functionally graded material of 304L stainless steel and inconel 625 fabricated by directed energy deposition: Characterization and thermodynamic modeling
Beth E. Carroll,Richard Otis,John Paul Borgonia,J. O. Suh,R. Peter Dillon,Andrew A. Shapiro,Douglas C. Hofmann,Zi Kui Liu,Allison M. Beese +8 more
TL;DR: In this paper, a component built from 304L stainless steel incrementally graded to Inconel 625 was characterized by microscopy, chemistry, phase composition, and microhardness as a function of position.
Journal ArticleDOI
Functionally graded Inconel 718 processed by additive manufacturing: Crystallographic texture, anisotropy of microstructure and mechanical properties
TL;DR: In this article, it is shown that transitions in microstructure, texture, and properties in fabricated Inconel 718 functionally graded components can be obtained at relatively small or large length scales, depending upon the functional gradient desired in a particular application.
Journal ArticleDOI
Study on microstructure and mechanical properties of laser rapid forming Inconel 718
TL;DR: Inconel™ 718 (IN718) has been deposited using laser rapid forming (LRF) from the gas atomized (GA) and plasma rotation electrode preparation (PREP) powders, and the mechanical properties of LRF IN718 were evaluated and compared in between as-deposited and heat-treated state as discussed by the authors.