| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Accelerated Testing to Understand the Long Term Performance of High Temperature Materials
|
| Presentation Title |
Stress Relaxation as a High Throughput and Accelerated Test to Evaluate Creep Strength in Additively Manufactured Ni-alloys |
| Author(s) |
Jonah Klemm-Toole, Dan McConville, Amy Clarke, Ben Rafferty, Kevin Eckes, Jeremy Iten |
| On-Site Speaker (Planned) |
Jonah Klemm-Toole |
| Abstract Scope |
Additively manufactured Ni-based alloys are attractive for several high temperature applications where creep is a dominant degradation mechanism. Constant load creep tests provide valuable information regarding strain rates and rupture life, but additional tests must be conducted for each stress and/or temperature of interest. Stress relaxation testing can provide creep strain rates for a wide range of stresses at a given temperature with a single sample in a matter of days. In this talk, stress relaxation testing is applied to laser powder bed fusion processed Alloy 230 to assess creep rates at 760 °C over a range of stresses relevant to creep lifetimes exceeding 100,000 hours. Creep rate estimates from stress relaxation testing are compared to constant load creep test results on the same materials, and challenges in data analysis and interpretation are presented. The outlook for stress relaxation testing as a method for rapid creep property assessment are discussed. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Mechanical Properties, High-Temperature Materials |