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Meeting MS&T21: Materials Science & Technology
Symposium Late News Poster Session
Presentation Title Texture Evolution during the High Temperature Heat Treatment of Additively Manufactured IN718
Author(s) Selda Nayir, Bertrand Max, Simon Perusin, Todd A. Palmer
On-Site Speaker (Planned) Selda Nayir
Abstract Scope Nickel base alloys fabricated using powder bed fusion additive manufacturing processes typically display highly oriented grains primarily directed in the dominant orientation of heat flow during processing. These highly oriented grains can produce strong anisotropy in the final components. Age-hardenable nickel alloys undergo a series of high-temperature post-process heat treatments in order to obtain their strength. Through a series of high-temperature heat treatments at temperatures between 1050˚C and 1200˚C, the evolution of the as-deposited grain structure across different orientations with respect to the build direction was evaluated. Surface textures along the build direction rotated from a prominent [001] to [011] direction while the texture perpendicular to build direction remained unchanged along the [011] with increasing temperatures and times. At the same time, the grain sizes and morphologies changed along this same direction transitioned from elongated to equiaxed grains, matching those observed on the plane normal to this orientation.

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Texture Evolution during the High Temperature Heat Treatment of Additively Manufactured IN718

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