Titanium alloy structures for airframe application by the laser forming process

Arcella, F. G.; Abbott, David H.

doi:10.2514/6.2000-1465

Cited by 18 publications

(7 citation statements)

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“…However, in the case of LAM SM of Ti-6Al-4V, preliminary results from development activities indicated that this particular AM process yielded strength properties which were just slightly anisotropic and had variability comparable to wrought material over the range of development articles produced. 8 Hence, the urgency of developing detailed process-property relationships was somewhat diminished. In spite of this apparent robustness of the LAM SM process, internal AFRL/ML research on microstructure evolution during laser deposition of Ti-6Al-4V demonstrated that changes in process variables could impact microstructure and discontinuity evolution and, therefore, mechanical properties.…”

Section: Process -Property Relationshipsmentioning

confidence: 99%

A Perspective of The Needs and Opportunities for Coupling Materials Science and Nondestructive Evaluation for Metals-Based Additive Manufacturing

Quintana¹,

Ji²,

Collins³

2022

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This paper presents a perspective of the needs and opportunities associated with the multidisciplinary problem of nondestructive evaluation (NDE) of additive manufacturing (AM). Recognizing the multidisciplinary nature of the problem, as well as the need to bridge knowledge between the different communities, the paper is structured to provide brief backgrounds and details relevant to both communities, as well as present an assessment of the state of the art. This paper, in some respects, is meant to be a primer of the different landscapes, as well as a catalyst for making future connections. At the end, it will be clear that there is much more work to be done, but that the work that is ongoing is exciting, and the potential to exploit NDE techniques for metals-based AM is very high.

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Section: Process -Property Relationshipsmentioning

confidence: 99%

A Perspective of The Needs and Opportunities for Coupling Materials Science and Nondestructive Evaluation for Metals-Based Additive Manufacturing

Quintana¹,

Ji²,

Collins³

2022

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“…Selective laser melting (SLM) is a mature AM technology and is used for the direct fabrication of complex and functional metal components by laser melting a bed of metal powder layer by layer until a fully formed metal part is achieved. The SLM technique has been validated for a number of important metal alloys including Ti-6Al-4V [2], 316 stainless steel [3], AlMg10Si [4], and maraging steel [5,6]. Microstructure and mechanical properties of AM metals have been investigated and often compared to subtractive manufactured metals.…”

Section: Introductionmentioning

confidence: 99%

Mechanical Properties of 3D-Printed Maraging Steel Induced by Environmental Exposure

Ansell

Ricks

Park

et al. 2020

Metals

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Changes in the mechanical properties of selective laser melted maraging steel 300 induced by exposure to a simulated marine environment were investigated. Maraging steel samples were printed in three orientations: vertical (V), 45° (45), and horizontal (H) relative to the print bed. These were tested as-printed or after heat-treatment (490 °C, 600 °C, or 900 °C). One set of specimens were exposed in a salt spray chamber for 500 h and then compared to unexposed samples. Environmental attack induced changes in the microstructural features and composition were analyzed by scanning electron microscopy and energy dispersive spectroscopy respectively. Samples printed in the H and 45° directions exhibited higher tensile strength than those printed in the V direction. Corrosion induced reduction in strength and hardness was more severe in specimens heat-treated between 480 °C and 600 °C versus as-printed samples. The greatest decrease in tensile strength was observed for the 45°-printed heat-treated samples after exposure. A comparison between additive and subtractive manufactured maraging steel is presented.

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“…In these methods, parts are fabricated by dispersing powdered metal over a molten pool of metal substrate created by laser or by melting the powder bed. In early uses, these methods were used in the making of titanium alloy frame parts for aeronautic and aerospace crafts, which are very hard to make by traditional forging and casting methods [4][5][6] . So, direct printing of metal parts brings great hope in manufacturing and it suddenly comes to be a new trend for the future.…”

Section: Introductionmentioning

confidence: 99%