Tensile fracture behavior of notched 9Cr-1Mo ferritic-martensitic steel specimens in contact with liquid lead-bismuth eutectic at 350 °C
| Autor: | Pierre Marmy, Erich Stergar, Serguei Gavrilov, Xing Gong |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
010302 applied physics
Materials science Lead-bismuth eutectic Mechanical Engineering Metallurgy 02 engineering and technology 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Cracking Brittleness Mechanics of Materials Liquid metal embrittlement Martensite 0103 physical sciences Ultimate tensile strength Fracture (geology) General Materials Science Composite material 0210 nano-technology Eutectic system |
| Zdroj: | Materials Science and Engineering: A. 692:139-145 |
| ISSN: | 0921-5093 |
| DOI: | 10.1016/j.msea.2017.03.067 |
| Popis: | Cracking jumps were observed in notched T91 (9Cr-1Mo ferritic-martensitic steel) specimens tested in liquid lead-bismuth eutectic (LBE) at 350 °C under tensile loading. The cracking jumps manifested themselves as being regular steps at tensile curves, while as being fatigue striation-like markings at fracture surfaces. The markings were consisted of liquid metal embrittlement (LME) zones and ductile zones. The liquid LBE was adsorbed at crack tip and likely reduced the interatomic bonding strength, leading to cracking in a brittle way and release of elastic energy in the load line. This unique phenomenon was found to be associated with coupled effects of LME and compliance/stiffness of tensile machines. |
| Databáze: | OpenAIRE |
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