1. Long-term stability of precipitated phases in CLAM steel during thermal aging.
- Author
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Wang, Wei, Xu, Gang, and Song, Liangliang
- Subjects
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OSTWALD ripening , *STEEL , *STEEL walls , *CLAMS , *DETERIORATION of materials , *FUSION reactors , *CONSTRUCTION materials , *THERMAL stability - Abstract
China Low Activation Martensitic (CLAM) steel as one of 9%Cr ferritic-martensitic steels was designed as the structural materials for fusion reactors and lead-based Reactor in China. The long-term thermal stability of precipitated phases in CLAM steel at 550 °C was systematically studied in this paper, including coarsening kinetics, number density and shape stability. Based on large data statistics, the coarsening kinetics of M 23 C 6 carbide, MX carbonitride and Laves phase were analyzed to develop a coarsening model of each precipitated phase, respectively. The results showed that the coarsening rate of Laves phase was about 100 times than that of M 23 C 6 carbide after aging for 20,000 h at 550 °C. The number density of precipitated phases increased firstly and then decreased with increasing of aging time due to a dynamic equilibrium process of the precipitation and dissolution of precipitated phase. The results will help to deep understand degradation mechanisms after thermal aging. [ABSTRACT FROM AUTHOR]
- Published
- 2019
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