Effect of material anisotropy on ultra-precision machining of Ti-6Al-4V alloy fabricated by selective laser melting

Ni, Chenbing; Zhu, Lida; Zheng, Zhongpeng; Zhang, Jiayi; Yang, Yun; Yang, Jin; Bai, Yuchao; Weng, Can; Lu, Wen Feng; Wang, Hao

doi:10.1016/j.jallcom.2020.156457

Cited by 56 publications

(13 citation statements)

References 24 publications

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“…The anisotropy of additive manufacturing samples, not only for WAAM and the specific case for Inconel 718 alloy, was proved as being a major influence in the post-processing procedure, for not only cutting forces and surface quality [ 31 ] for different build and cut directions but also tool wear [ 32 ].…”

Section: Resultsmentioning

confidence: 99%

Study on the Effects of Different Cutting Angles on the End-Milling of Wire and Arc Additive Manufacturing Inconel 718 Workpieces

2022

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This research presents an analysis of the effects of different cutting angles on the side milling of Inconel 718 products manufactured with the Wire and Arc Additive Manufacturing (WAAM) technique. Considering that this manufacturing technology can build near-net shape products, its surface quality is deemed unqualified as a final product, requiring a post-processing step. In this paper, three different angles—0°, 35°, and 90—are compared, looking for possible differences regarding its machinability. As the alloy in question is a material known for being difficult to machine, and the samples were produced with the additive manufacturing technique that created peculiar characteristics, it was deemed necessary to analyze different aspects of the machining process: the surface quality, tool wear, and cutting forces for all three cases, and to rank the angles regarding these results. With analog experiments with the same alloy but cold-rolled, it was possible to infer that not only is the 0-degree angle is the best option for milling, but the anisotropy of the WAAM samples could be the major source of the differences in the milling results.

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Section: Resultsmentioning

confidence: 99%

Study on the Effects of Different Cutting Angles on the End-Milling of Wire and Arc Additive Manufacturing Inconel 718 Workpieces

2022

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“…The directional microstructure of selective laser melted parts results in anisotropic material properties as reported by Chen et al (2017), Ni et al (2020) and Fang et al (2021). In the present work, the anisotropic issue of Ti6Al4V parts produced by SLM is addressed through unconventional approaches, which include internal friction and electrical resistivity measurements.…”

Section: Introductionmentioning

confidence: 90%

Study of anisotropy through microscopy, internal friction and electrical resistivity measurements of Ti-6Al-4V samples fabricated by selective laser melting

Nespoli

Bennato

Villa

et al. 2022

RPJ

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Purpose This paper aims to investigate the microstructural anisotropy of Ti-6Al-4V samples fabricated by selective laser melting. Design/methodology/approach Specimens are fabricated through a Renishaw AM400 selective laser melting machine. Three microstructures (as-built, 850°C annealed and 1,050°C annealed) and two building orientations, parallel (PA) and perpendicular (PE) to the building platform, are considered. Starting from in-depth microscopic observations and comprehensive electron backscattered diffraction imaging, the study addresses non-conventional techniques such as internal friction and electrical resistivity measurements to assess the anisotropy of the fabricated parts. Findings Microscope observations highlight a fine texture with columnar grains parallel to the building direction in the as-built and 850°C annealed samples. Besides, coarse grains characterized the 1,050°C annealed specimens. Internal friction measurements pointed out the presence of internal stress while storage modulus analyses appear sensitive to texture. Electrical resistivity is resulted to be dependent on grain orientation. Originality/value The work uses some novel characterization techniques to study the anisotropy and internal stresses of Ti-6Al-4V samples processed by selective laser melting. Mechanical spectroscopy results suitable in this kind of study, as it mimics the operating conditions of the material.

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“…Besides, it is found that the milling procedure hardly changes the microhardness of the DED samples. To generate a superior surface finish and study the machinability of AM parts, Ni et al [132,133] utilized ultra-precision machining (UPM) to cut SLM-ed Ti-6Al-4V alloy. They found that the material anisotropy is notable in UPM regarding the achieved surface roughness and cutting forces.…”

Section: Machining and Abrasive Finishingmentioning

confidence: 99%

A Review of Post-Processing Technologies in Additive Manufacturing

Peng

Kong

Fuh

et al. 2021

JMMP

Self Cite

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Additive manufacturing (AM) technology has rapidly evolved with research advances related to AM processes, materials, and designs. The advantages of AM over conventional techniques include an augmented capability to produce parts with complex geometries, operational flexibility, and reduced production time. However, AM processes also face critical issues, such as poor surface quality and inadequate mechanical properties. Therefore, several post-processing technologies are applied to improve the surface quality of the additively manufactured parts. This work aims to document post-processing technologies and their applications concerning different AM processes. Various types of post-process treatments are reviewed and their integrations with AM process are discussed.

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Effect of material anisotropy on ultra-precision machining of Ti-6Al-4V alloy fabricated by selective laser melting

Cited by 56 publications

References 24 publications

Study on the Effects of Different Cutting Angles on the End-Milling of Wire and Arc Additive Manufacturing Inconel 718 Workpieces

Study on the Effects of Different Cutting Angles on the End-Milling of Wire and Arc Additive Manufacturing Inconel 718 Workpieces

Study of anisotropy through microscopy, internal friction and electrical resistivity measurements of Ti-6Al-4V samples fabricated by selective laser melting

A Review of Post-Processing Technologies in Additive Manufacturing

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