The Woodruff School

SUMMARY

In Additive Manufacturing of Inconel 718 most focus has been on the primary solidification occurring in the build. The next critical processing step for age-hardened alloys is the post-build heat treatment. Since diffusivity depends on the spatial distribution of the elements, the solution treatment and age parameters established for conventionally manufactured Alloy 718 components will likely not be optimal for additive-manufactured components. This study specifically focuses on developing methods to rapidly establish the post-build heat treatment for Alloy 718 fabricated by electron beam melting (EBM) using a design of experiments approach.

SUBJECT:	M.S. Thesis Presentation

BY:	Benjamin Seitz

TIME:	Monday, August 8, 2016, 10:00 a.m.

PLACE:	Love Building, 210

TITLE:	�Methodology for Efficiently Establishing Processing-Structure-Property Relationships for Additive-Manufactured Age-Hardened Alloys�

COMMITTEE:	Dr. Richard W. Neu, Chair (ME) Dr. David L. McDowell (ME) Dr. Siegfried Schmauder (University of Stuttgart) Dr. Oliver Sawodny (University of Stuttgart)

SUMMARY In Additive Manufacturing of Inconel 718 most focus has been on the primary solidification occurring in the build. The next critical processing step for age-hardened alloys is the post-build heat treatment. Since diffusivity depends on the spatial distribution of the elements, the solution treatment and age parameters established for conventionally manufactured Alloy 718 components will likely not be optimal for additive-manufactured components. This study specifically focuses on developing methods to rapidly establish the post-build heat treatment for Alloy 718 fabricated by electron beam melting (EBM) using a design of experiments approach.