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Spatial Control of Functional Response in 4D-Printed Active Metallic Structures.

ABSTRACT: We demonstrate a method to achieve local control of 3-dimensional thermal history in a metallic alloy, which resulted in designed spatial variations in its functional response. A nickel-titanium shape memory alloy part was created with multiple shape-recovery stages activated at different temperatures using the selective laser melting technique. The multi-stage transformation originates from differences in thermal history, and thus the precipitate structure, at various locations created from controlled variations in the hatch distance within the same part. This is a first example of precision location-dependent control of thermal history in alloys beyond the surface, and utilizes additive manufacturing techniques as a tool to create materials with novel functional response that is difficult to achieve through conventional methods.

SUBMITTER: Ma J

PROVIDER: S-EPMC5399446 | biostudies-literature | 2017 Apr

REPOSITORIES: biostudies-literature

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Spatial Control of Functional Response in 4D-Printed Active Metallic Structures.

Ma Ji J Franco Brian B Tapia Gustavo G Karayagiz Kubra K Johnson Luke L Liu Jun J Arroyave Raymundo R Karaman Ibrahim I Elwany Alaa A

Scientific reports 20170421

We demonstrate a method to achieve local control of 3-dimensional thermal history in a metallic alloy, which resulted in designed spatial variations in its functional response. A nickel-titanium shape memory alloy part was created with multiple shape-recovery stages activated at different temperatures using the selective laser melting technique. The multi-stage transformation originates from differences in thermal history, and thus the precipitate structure, at various locations created from con ...[more]

PMID: 28429796

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