Abstract
In this study, we performed fracture toughness testing of ten Eurofer97 steel variants using precracked miniature multi-notch bend bar (M4CVN) specimens based on the Master Curve method in the ASTM E1921 standard. Additional Vickers microhardness and room temperature tensile testing complemented the fracture toughness testing. Compared with standard Eurofer97, the ten variants didn't show a comprehensive improvement of mechanical properties. The Master Curve method was found to yield a reasonable prediction of fracture toughness results obtained from M4CVN specimens with most valid fracture toughness data within the 2% and 98% tolerance boundaries of the Master Curve. The three-parameter Weibull distribution with Weibull exponent b = 4 also yielded excellent prediction of the relationship between fracture toughness results KJc and the cumulative probability for failure pf for one steel variant.
| Original language | English |
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| Title of host publication | Codes and Standards |
| Publisher | American Society of Mechanical Engineers (ASME) |
| ISBN (Electronic) | 9780791858929 |
| DOIs | |
| State | Published - 2019 |
| Event | ASME 2019 Pressure Vessels and Piping Conference, PVP 2019 - San Antonio, United States Duration: Jul 14 2019 → Jul 19 2019 |
Publication series
| Name | American Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP |
|---|---|
| Volume | 1 |
| ISSN (Print) | 0277-027X |
Conference
| Conference | ASME 2019 Pressure Vessels and Piping Conference, PVP 2019 |
|---|---|
| Country/Territory | United States |
| City | San Antonio |
| Period | 07/14/19 → 07/19/19 |
Funding
This study was supported by the U.S. Department of Energy, Office of Fusion Energy Sciences under contact DE-AC05-00OR22725 and Karlsruhe Institute of Technology under contract NFE-16-06240 with ORNL managed by UT Battelle, LLC. Materials development, production and preparation in this work, supported by the European Commission under the contract of Associations, was carried out within the framework of the European Fusion Development Agreement. The views and opinions expressed herein do not necessarily reflect those of the European Commission. We would like to acknowledge the colleagues who developed, produced, prepared, and provided the different steel grades: CEA (J. Henry), SCK-CEN (A. Puype, L. Malerba), ENEA (C. Cristalli, L. Pilloni), CSM (O. Tassa), KIT (J. Hoffmann), and OCAS (N. de Wispelaere). In addition, we would like to thank E. Manneschmidt and R. Swain from ORNL for performing part of mechanical testing. The authors are also grateful for L. Tan and W. Tang from ORNL for their technical review of this manuscript.
Keywords
- Eurofer97
- Fracture Toughness
- Fusion
- Master Curve
- Miniature multi-notch bend bar
- Small Specimen Testing Technique
- Weibull distribution