| About this Abstract |
| Meeting |
2023 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2023)
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| Symposium
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2023 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2023)
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| Presentation Title |
Metal Additive Manufacturing of Rollers for Railroad Bearings: Rolling Contact Fatigue Performance |
| Author(s) |
Joseph A. Turner, Luz D. Sotelo, Allen J. Fuller, Cody S. Pratt, Boone J. Gray, Nathanial J. Matz, Guru Madireddy, Rakeshkumar Karunakaran, Michael P. Sealy, Timothy M. Liebe |
| On-Site Speaker (Planned) |
Joseph A. Turner |
| Abstract Scope |
We report on progress with respect to rolling contact fatigue (RCF) performance of railroad bearing rollers manufactured from 8620HC steel powder with laser powder bed fusion (LPBF). The print parameters were first studied using several measurements: material density, optical microscopy, ultrasound, and residual stress. Then a set of tapered cylindrical rollers was manufactured and integrated within a railroad tapered roller bearing. The bearings were subjected to accelerated fatigue and a simulated service life test with RCF typical of in-service bearings (~250,000 equivalent miles). After these tests, the AM rollers were removed, inspected, and compared with conventionally manufactured rollers subjected to the same loading conditions. The performance of the AM rollers was judged to be in-line with rollers manufactured using traditional methods. These results provide a clear foundation for additional AM roller designs that can exploit the unique capabilities of AM for challenging applications associated with fracture and fatigue performance. |
| Proceedings Inclusion? |
Definite: Post-meeting proceedings |