Laser Metal Deposition Additive Manufacturing of TiC Reinforced Inconel 625 Composites: Influence of the Additive TiC Particle and Its Starting Size

In this study, laser metal deposition (LMD) additive manufacturing was used to deposit the pure Inconel 625 alloy and the TiC/Inconel 625 composites with different starting sizes of TiC particles, respectively. The influence of the additive TiC particle and its original size on the constitutional phases, microstructural features, and mechanical properties of the LMD-processed parts was studied. The incorporation of TiC particles significantly changed the prominent texture of Ni–Cr matrix phase from (200) to (100). The bottom and side parts of each deposited track showed mostly the columnar dendrites, while the cellular dendrites were prevailing in the microstructure of the central zone of the deposited track. As the nano-TiC particles were added, more columnar dendrites were observed in the solidified molten pool. The incorporation of nano-TiC particles induced the formation of the significantly refined columnar dendrites with the secondary dendrite arms developed considerably well. With the micro-TiC particles added, the columnar dendrites were relatively coarsened and highly degenerated, with the secondary dendrite growth being entirely suppressed. The cellular dendrites were obviously refined by the additive TiC particles. When the nano-TiC particles were added to reinforce the Inconel 625, the significantly improved microhardness, tensile property, and wear property were obtained without sacrificing the ductility of the composites.

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Additive manufacturing of W–Fe composites using laser metal deposition: Microstructure, phase transformation, and mechanical properties

Materials Science and Engineering A ◽

10.1016/j.msea.2021.141036 ◽

2021 ◽

Vol 811 ◽

pp. 141036

Author(s):

Hui Chen ◽

Lei Ye ◽

Yong Han ◽

Chao Chen ◽

Jinglian Fan

Keyword(s):

Mechanical Properties ◽

Phase Transformation ◽

Additive Manufacturing ◽

Metal Deposition ◽

Laser Metal Deposition

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Additive Manufacturing

Additive Manufacturing Technologies From an Optimization Perspective - Advances in Logistics, Operations, and Management Science ◽

10.4018/978-1-5225-9167-2.ch008 ◽

2019 ◽

pp. 165-183 ◽

Cited By ~ 2

Author(s):

Kamardeen Olajide Abdulrahman ◽

Esther T. Akinlabi ◽

Rasheedat M. Mahamood

Keyword(s):

Mechanical Properties ◽

Additive Manufacturing ◽

Titanium Aluminide ◽

Three Dimensional ◽

Physical And Mechanical Properties ◽

Processing Parameters ◽

Metal Deposition ◽

Layer By Layer ◽

Laser Metal Deposition ◽

Additive Process

Three-dimensional printing has evolved into an advanced laser additive manufacturing (AM) process with capacity of directly producing parts through CAD model. AM technology parts are fabricated through layer by layer build-up additive process. AM technology cuts down material wastage, reduces buy-to-fly ratio, fabricates complex parts, and repairs damaged old functional components. Titanium aluminide alloys fall under the group of intermetallic compounds known for high temperature applications and display of superior physical and mechanical properties, which made them most sort after in the aeronautic, energy, and automobile industries. Laser metal deposition is an AM process used in the repair and fabrication of solid components but sometimes associated with thermal induced stresses which sometimes led to cracks in deposited parts. This chapter looks at some AM processes with more emphasis on laser metal deposition technique, effect of LMD processing parameters, and preheating of substrate on the physical, microstructural, and mechanical properties of components produced through AM process.

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On the Effect of Heat Input and Interpass Temperature on the Performance of Inconel 625 Alloy Deposited Using Wire Arc Additive Manufacturing–Cold Metal Transfer Process

Metals ◽

10.3390/met12010046 ◽

2021 ◽

Vol 12 (1) ◽

pp. 46

Author(s):

Chengxun Zhang ◽

Zhijun Qiu ◽

Hanliang Zhu ◽

Zhiyang Wang ◽

Ondrej Muránsky ◽

...

Keyword(s):

Mechanical Properties ◽

Additive Manufacturing ◽

Heat Input ◽

Inconel 625 ◽

Heat Accumulation ◽

Cold Metal Transfer ◽

Inconel 625 Alloy ◽

Cold Metal ◽

Wire Arc Additive Manufacturing ◽

Interpass Temperature

Relatively high heat input and heat accumulation are treated as critical challenges to affect the qualities and performances of components fabricated by wire arc additive manufacturing (WAAM). In this study, various heat inputs, namely 276, 552 and 828 J/mm, were performed to fabricate three thin-wall Inconel 625 structures by cold metal transfer (CMT)-based WAAM, respectively, and active interpass cooling was conducted to limit heat accumulation. The macrostructure, microstructure and mechanical properties of the produced components by CMT were investigated. It was found that the increased heat input can deteriorate surface roughness, and the size of dendrite arm spacing increases with increasing heat input, thus leading to the deterioration of mechanical properties. Lower heat input and application of active interpass cooling can be an effective method to refine microstructure and reduce anisotropy. This study enhances the understanding of interpass temperature control and the effectiveness of heat inputs for Inconel 625 alloy by WAAM. It also provides a valuable in situ process for microstructure and mechanical properties’ refinement of WAAM-fabricated alloys and the control of heat accumulation for the fabrication of large-sized structures for future practical applications.

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