Evolution of creep behavior of CLAM steel after thermal aging at 550 °C
Source abstract
Abstract
Abstract As the primary candidate structural materials for fusion energy systems, reduced activation ferritic/martensitic (RAFM) steel must to withstand high temperature for a long periods of time. The microstructure of RAFM steel would change due to thermal aging in service, and that would resulting in the change of creep behavior. The aim of this paper is to investigate change of creep behavior of CLAM steel after thermal aging at 550 °C for 2000 h and 4000 h. The results showed that the creep property degenerated obviously after thermal aging. After aging for 4000 h, the creep-rupture time of CLAM sample decreased from 202 h to 111 h and the minimum creep rate increased from 3.61 × 10−4 s−1 to 6.84 × 10−4 s−1, compared to un-aged sample. The reason for creep property degeneration was inferred to be that the solute atom in CLAM matrix decreased during the process of second phase precipitated and coarsened after thermal aging. The analysis indicated that the maximum operating temperature and rupture life of CLAM sample was decreased by the effect of thermal aging.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Fusion materials and technologies · Nuclear Materials and Properties · Advanced materials and composites
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (30)
Show source-provided references
1. Laves phase evolution in a modified P911 heat resistant steel during creep at 923 K10.1016/j.msea.2011.10.064 ↗
2. Recent progress of R&D activities on reduced activation ferritic/martensitic steels10.1016/j.jnucmat.2012.12.039 ↗
3. Development status of CLAM steel for fusion application10.1016/j.jnucmat.2014.08.055 ↗
4. Design status and development strategy of China liquid lithium-lead blankets and related material technology10.1016/j.jnucmat.2007.04.031 ↗
5. Identification of safety gaps for fusion demonstration reactors10.1038/nenergy.2016.154 ↗
6. Conceptual design of the China fusion power plant FDS-II10.1016/j.fusengdes.2008.06.048 ↗
7. A fusion-driven subcritical system concept based on viable technologies10.1088/0029-5515/51/10/103036 ↗
8. Development strategy and conceptual design of China lead-based research reactor10.1016/j.anucene.2015.08.015 ↗
9. Status and improvement of CLAM for nuclear application10.1088/1741-4326/aa763f ↗
10. Microstructure and its influence on mechanical properties of CLAM steel10.1016/j.fusengdes.2012.06.008 ↗
11. Influence of non-metal inclusions on mechanical properties of CLAM steel10.1016/j.fusengdes.2008.12.037 ↗
12. Long-term properties of reduced activation ferritic/martensitic steels for fusion reactor blanket system10.1016/j.fusengdes.2011.06.005 ↗
13. Comparison of microstructural properties and Charpy impact behaviour between different plates of the Eurofer97 steel and effect of isothermal ageing10.1016/j.jnucmat.2011.06.018 ↗
14. Effect of thermal aging on microstructure and mechanical properties of China low-activation martensitic steel at 550 °C10.1016/j.net.2015.11.004 ↗
15. Effect of thermal ageing on the impact fracture behavior of Eurofer’97 steel10.1016/j.jnucmat.2008.12.319 ↗
16. Creep strength of reduced activation ferritic/martensitic steel Eurofer’9710.1016/j.fusengdes.2005.06.085 ↗
17. Effect of thermal ageing on tensile and creep properties of JLF-1 and CLAM steels10.1016/j.jnucmat.2008.12.149 ↗
18. Creep rates and strengthening mechanisms in tungsten-strengthened 9Cr steel10.1016/S0921-5093(00)02002-5 ↗
19. The effect of hot bending and thermal ageing on creep and microstructure evolution in thick-walled P92 steel pipe10.1016/j.msea.2015.07.072 ↗
20. Correlation between structural changes of M23C6 carbide and mechanical behaviour of P91 steel after thermal aging10.1016/j.msea.2017.04.103 ↗
21. Thermal creep behaviour of the EUROFER 97 RAFM steel and two European ODS EUROFER 97 steels10.1016/j.fusengdes.2005.06.311 ↗
22. Long-term thermal stability of reduced activation ferritic/martensitic steels as structure materials of fusion blanket10.1585/pfr.5.S1036 ↗
23. Microstructure evolution in 9Cr martensitic steel during long-term creep at 650°C10.1016/S1006-706X(12)60113-7 ↗
24. Effect of MX type particles on creep strength of ferritic steel10.1016/S0022-3115(03)00281-2 ↗
25. Creep deformation and rupture behavior of CLAM steel at 823 K and 873 K10.1016/j.jnucmat.2014.08.041 ↗
26. The evolution of dislocation density during heat treatment and creep of tempered martensite ferritic steels10.1016/S1359-6454(03)00324-0 ↗
27. On the contribution of carbides and micrograin boundaries to creep strength of tempered martensite ferritic steels10.1016/j.actamat.2006.08.046 ↗
28. Abe · 2008
29. On the effect of long-term creep on the microstructure of a 12% chromium tempered martensite ferritic steel10.1016/j.actamat.2009.07.010 ↗
30. Mechanical behavior of crystalline solids at elevated temperature