Effect of heat accumulation on the microstructure of Invar alloy manufactured by multi-layer multi-pass laser melting deposition

Liu, Ting; Gao, Zhuanni; Ling, Wanli; Wang, Yanni; Wang, Xiaoming; Zhan, Xiaoli

doi:10.1016/j.optlastec.2021.107407

Cited by 17 publications

(6 citation statements)

References 29 publications

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“…As was demonstrated by Liu et al [8], when the following bead is deposited, a part of the previous one, which is dependent on the overlap distance, is remelted. Then, a melt pool is created with the new feed material and the part of the material of the previous bead.…”

Section: Microstructural Analysismentioning

confidence: 86%

“…Also, power/laser directed energy deposition technology was utilized to manufacture Invar parts. For example, Liu et al [8] studied experimentally and via simulations the heat accumulation in this type of processes. Furthermore, Zhan et al [9] studied the effect of the heat input on the microstructure and the orientation of the grains, employing optical microscopy, finding that the orientation of the cellular crystals is highly influenced by the heat flow, and consequently by the scanning direction.…”

Section: Introductionmentioning

confidence: 99%

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Effect of the Heat Input on Wire-Arc Additive Manufacturing of Invar 36 Alloy: Microstructure and Mechanical Properties

et al. 2022

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Invar, also known as FeNi36, is a material of great interest due to its unique properties, which makes it an excellent alternative for sectors such as tooling in aeronautics and aerospace. Its manufacture by means of wire arc additive manufacturing (WAAM) technology could extend its use. This paper aims to evaluate the comparison of two of the most widespread WAAM technologies: plasma arc welding (PAW) and gas metal arc welding (GMAW). This comparison is based on the analysis of wall geometry, metallography, and mechanical properties of the material produced by both technologies. The results show a slight increase in toughness and elongation before fracture and worse tensile strength data in the case of PAW, with average values of 485 MPa for ultimate tensile strength (UTS), 31% for elongation and 475 MPa, 40% in GMAW and PAW, respectively. All results gathered from the analysis show the possibility of successful manufacturing of Invar by means of WAAM technologies. The novelties presented in this paper allow us to establish relationships between the thermal input of the process itself and the mechanical and metallographic properties of the material produced.

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Section: Microstructural Analysismentioning

confidence: 86%

Section: Introductionmentioning

confidence: 99%

Effect of the Heat Input on Wire-Arc Additive Manufacturing of Invar 36 Alloy: Microstructure and Mechanical Properties

et al. 2022

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“…The laser absorption coefficient of the material increases with the electrical resistivity of the material increasing [36]. The electrical resistivity of TiC is higher than that of Ti-6Al-4V alloy.…”

Section: Distribution Of the Undissolved Tic Particlesmentioning

confidence: 97%

“…But the liquid metal solidifies with a quite high cooling rate in the LMD process [49], so the interacting time between TiC and liquid metal is too short to ensure the complete dissolution of the TiC particles. Furthermore, it is difficult for TiC particles to be melted into the molten Ti completely because the melting point TM of TiC is high [36,49]. As a result, the undissolved TiC particles with blocky shapes retain in the Ti-6Al-4V matrix.…”

Section: Distribution Of the Undissolved Tic Particlesmentioning

confidence: 99%

“…However, insufficient work has paid attention to the changes in the microstructure of the TiC/Ti-6Al-4V composite due to the thermal gradient, overlap, and re-melting of the previous layers. It has been demonstrated that heat accumulation happens in the LMD process due to overlap and remelting of the previous layers and the thermal history changes as the number of deposited layers increases [36].…”

Section: Introductionmentioning

confidence: 99%

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Investigation of the microstructure evolution of TiC/Ti-6Al-4V composite manufactured by laser melting deposition

Nomqonde

Mashinini²,

Lekoadi³

et al. 2022

MATEC Web Conf.

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This study investigated the microstructure evolution of the TiC/Ti-6Al-4V matrix composite produced using a 1073 nm continuous wave (CW), IPG Ytterbium fibre laser. The influence of thermal gradient, overlap, and re-melting of the previous layers on the microstructure of TiC/Ti6Al4V matrix composite samples was analyzed using the scanning electron microscope (SEM). The microstructure showed that the TiC/Ti-6Al-4V composite samples are composed of undissolved TiC, in-situ TiC (eutectic TiC and primary TiC), α Ti and β Ti. While martensite microstructure was observed on the Ti-6Al-4V alloy samples. It was observed that the single-track and single-layer composite samples are consists of blocky TiC, granular eutectic TiC, chain-shaped eutectic TiC and dendritic primary TiC phases. While the cube composite sample shows granular primary TiC and dendritic primary TiC. Dendritic primary TiC is observed in all composite samples.

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Thermal-fluid dynamic behavior and its effect on particle distribution and solidification characterization during the laser melting deposition of Ti-based composites

Wang,

Li,

Yang

et al. 2024

Int J Adv Manuf Technol

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Effect of heat accumulation on the microstructure of Invar alloy manufactured by multi-layer multi-pass laser melting deposition

Cited by 17 publications

References 29 publications

Effect of the Heat Input on Wire-Arc Additive Manufacturing of Invar 36 Alloy: Microstructure and Mechanical Properties

Effect of the Heat Input on Wire-Arc Additive Manufacturing of Invar 36 Alloy: Microstructure and Mechanical Properties

Investigation of the microstructure evolution of TiC/Ti-6Al-4V composite manufactured by laser melting deposition

Thermal-fluid dynamic behavior and its effect on particle distribution and solidification characterization during the laser melting deposition of Ti-based composites

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