About this Abstract |
Meeting |
Superalloys 2024
|
Symposium
|
Superalloys 2024
|
Presentation Title |
E-13: Stress Relaxation Testing as a High-throughput Method for Assessing Creep Strength in Laser Powder Bed Fusion Processed Ni-based Superalloys |
Author(s) |
Daniel McConville, Ben Rafferty, Jeremy Iten, Kevin Eckes, Stan Baldwin, Amy Clarke, Jonah Klemm-Toole |
On-Site Speaker (Planned) |
Daniel McConville |
Abstract Scope |
Ni-based superalloys processed by laser beam powder bed fusion (PBF-LB) additive manufacturing (AM) are ideal for high temperature structural applications in the aerospace and power generation industries due to the increased component complexity afforded by AM. However, conventional creep testing limits the rate at which new materials can be produced with AM. To help accelerate the acceptance of AM Ni-based alloys for high temperature applications, methods for high-throughput creep evaluation are needed. The stress relaxation test has potential to hasten the development and validation of PBF-LB Ni-based structural alloys by assessing a wide range of creep rates relevant to service conditions with a single test. In this work, alloy Ni230, a gas atomized powder derivative of Haynes 230, and variant thereof containing added TiC are assessed. Each material was subjected to a limited subset of conventional creep tests accompanied by stress relaxation tests. Following the calculation methodology described herein, stress relaxation tests predict creep rates and rupture times that align well with conventional creep test results. Stress relaxation tests also reveal features of microstructural characteristics and evolution which are not readily apparent with other experiments. Several advantages and challenges with stress relaxation testing are discussed. |
Proceedings Inclusion? |
Definite: At-meeting proceedings |