About this Abstract |
Meeting |
Additive Manufacturing Benchmarks 2022 (AM-Bench 2022)
|
Symposium
|
Additive Manufacturing Benchmarks 2022 (AM-Bench 2022)
|
Presentation Title |
Role of Composition in High Temperature Heat-treatment Response of Additively Manufactured 17-4 PH Stainless Steel |
Author(s) |
Derek J. Shaffer, Todd Palmer |
On-Site Speaker (Planned) |
Todd Palmer |
Abstract Scope |
Precipitation hardening (PH) stainless steels processed using additive manufacturing (AM) display variations in heat treatment responses and mechanical properties. These variations have been primarily attributed to changes in interstitial element compositions within the allowable ranges. With AM processing of these alloys, composition variations of both interstitial and primary alloying elements combined with microstructures that differ from wrought, impact the thermodynamic stability of important phases such as copper, austenite, delta-ferrite, nitrides, and oxides. This work aims to connect compositional changes in interstitial alloying elements like nitrogen and oxygen as well as other primary elements in AM PH stainless steels to microstructures after hot isostatic pressing (HIP) and solution heat-treatments. A predictable, high temperature heat-treatment response can be established by investigating key aspects of solutionizing and HIP such as the thermodynamic stability of delta-ferrite and copper as well as the influence high temperature phases like nitrides and oxides. |
Proceedings Inclusion? |
Undecided |