About this Abstract |
Meeting |
MS&T22: Materials Science & Technology
|
Symposium
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Additive Manufacturing of Metals: Microstructure, Properties and Alloy Development
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Presentation Title |
Effect of Hot Isostatic Pressing on Mechanical Properties of Additively Manufactured Ni-based Superalloy Rene65 |
Author(s) |
Colleen Hilla, Andrew Wessman, Michael Eff, Ron Aman, Michael Mills, Wei Zhang |
On-Site Speaker (Planned) |
Colleen Hilla |
Abstract Scope |
Additive manufacturing is widely used in aerospace applications as it allows for cost-effective production of complex geometries and low volume parts. These demanding applications require the printed alloys to possess superior high temperature strength and creep behavior. This study evaluates the effect of hot isostatic pressing (HIP) on the mechanical properties of additively manufactured Rene65, a high γ’ strengthened Ni-based superalloy. As-built, solution heat treated (SHT) and wrought samples were tested for comparison. For SHT and HIP, subsolvus and supersolvus conditions were analyzed. A unique HIP treatment was performed at low (subsolvus) temperature compensated with high pressure. Moreover, rapid controlled cooling was utilized to control precipitation. Compression and tension creep and elevated and room temperature tensile strengths were analyzed. Microstructures were characterized through electron backscattered diffraction and scanning electron microscopy. Improved mechanical properties were seen after HIP and multiple heat treatments of additively manufactured material, superior to wrought Rene65. |