Heat treatment temperature-induced microstructure, microhardness and wear resistance of Inconel 718 produced by selective laser melting additive manufacturing

Karabulut, Yusuf; Taşçıoğlu, Emre; Kaynak, Yusuf

doi:10.1016/j.ijleo.2019.163907

Cited by 56 publications

(18 citation statements)

References 18 publications

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“…On the other hand, the maximum average microhardness (322 HV) was observed at 0.38 mm support gap, 1.02 mm support spacing and 1.27 mm support thickness. The microhardness measurement results are consistent with the results in literature [50].…”

Section: Microhardness Resultssupporting

confidence: 91%

The effect of contactless support parameters on the mechanical properties of laser powder bed fusion produced overhang parts

Gülcan

Günaydın²,

Çelik³

et al. 2022

Int J Adv Manuf Technol

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Support structures are used in especially overhang areas in laser metal additive manufacturing to prevent parts from distortion due to high thermal gradients. Since the support structures are not a part of the nal component, extra time and material are needed for manufacturing. Moreover, they need to be removed after the build is completed. In addition to waste of time and material, distortion and/or surface roughness issues at supported surfaces may be observed during support removal. As a solution, contactless supports with no direct contact between the support and the part are studied in the present work. Contactless support gap, thickness of each contactless support pieces and the spacing between two contactless support pieces were used as design variables and dimensional variations, distortions, microhardness through thickness, microstructural changes of bottom surfaces, and surface roughness of overhang features were selected as performance outputs. A full set of design of experiments were manufactured by laser powder bed fusion process using Inconel 718 material. It was observed that all three geometrical parameters had direct in uence on the performance outputs.

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Section: Microhardness Resultssupporting

confidence: 91%

The effect of contactless support parameters on the mechanical properties of laser powder bed fusion produced overhang parts

Gülcan

Günaydın²,

Çelik³

et al. 2022

Int J Adv Manuf Technol

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“…This microstructure makes AMed parts have double the hardness compared to wrought steel [132], reducing both abrasive wear and adhesive wear. In the case when AMed stainless steel has a similar hardness to wrought stainless steel, its microstructure also makes it more wear-resistant [135]. The segregation of chromium carbide, while bad for corrosion resistance, greatly improves its wear resistance.…”

Section: 3mentioning

confidence: 99%

A Review on Corrosion and Wear of Additively Manufactured Alloys

Renner

Jha

Chen

et al. 2021

Journal of Tribology

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Products made from additive manufacturing processes have attracted great attention in engineering, health care, and society at large. However, there is little knowledge about the failure of additively manufactured alloys, in particular, corrosion and wear seen in most engineering applications. The haphazard and inefficient usage of such alloys raised concerns about safety, compatibility, reliability, cost, and consumer satisfaction. To address those concerns, we studied the mechanisms of the most common failure modes, corrosion and wear, of alloys fabricated through additive manufacturing based on published literature. It was found that the processing conditions have profound influence on microstructure and thus corrosion and wear resistance of alloys. Because of the layered structure, the initiation and growth of both corrosion and wear exhibited anisotropic behavior. The insights from this review could be used as a reference of the state-of-the art and to help in the development of future additively manufactured alloys with improved corrosion and wear properties.

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“…However, the change of microhardness will affect the processing performance of materials, and the surface microhardness directly determines the wear resistance and fatigue performance of the machined surface. Yusuf Karabulut et al [25]roposed microhardness and wear resistance is remarkably induced from the final state of microstructure. The phase state was affected by heat treatment temperature, that led to miscrohardness increased.…”

Section: Introductionmentioning

confidence: 99%

Mechanism of gradient strengthening layer formation based on microstructure and microhardness of Inconel 718 grinding surface

Dong

Zhang

et al. 2022

Int J Adv Manuf Technol

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Gradient strengthening layer will emerge on the grinding surface of Inconel 718 due to the difference of microstructure. The surface microstructure and microhardness are not independent of each other, and the microhardness is the embodiment of the microstructure evolution in the strength aspect. In this paper, the microstructure observation, microhardness experiments and strengthening theory were combined to analyze. The experimental results show that the grinding surface consists of grain refinement layer and high-density dislocation layer. The grain refinement layer is constituted of equiaxed nano-grains and elongated grains, in which grain boundary strengthening occurred leading to an increase in microhardness. Dislocation strengthening occurred in the high-density dislocation layer, in which the increment of dislocation density is approximately 3.54 × 10 9 mm -2 compared with inner matrix. Microhardness of high-density dislocation region reaches the maximum (438.6 ± 11.1 HV0.01) because of the dislocation strengthening. The variation of microhardness is discussed from two strengthening mechanisms of grain boundary strengthening and dislocation strengthening, and the strengthening mechanism in the different regions of grinding surface is revealed. The calculated microhardness increments through these mechanisms in the refined-grain region and the high-density dislocation region are basically consistent with the measured values.

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Heat treatment temperature-induced microstructure, microhardness and wear resistance of Inconel 718 produced by selective laser melting additive manufacturing

Cited by 56 publications

References 18 publications

The effect of contactless support parameters on the mechanical properties of laser powder bed fusion produced overhang parts

The effect of contactless support parameters on the mechanical properties of laser powder bed fusion produced overhang parts

A Review on Corrosion and Wear of Additively Manufactured Alloys

Mechanism of gradient strengthening layer formation based on microstructure and microhardness of Inconel 718 grinding surface

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