,Dynamic Behaviors of Hydrogen in Martensitic T91 Steel Evaluated by Using the Internal Friction Met

• 作 者: HU Jing WANG Xian-Ping ZHUANG Zhong ZHANG Tao FANG Qian-Feng LIU Chang-Song
• 机 构: Key Laboratory Materials Physics,Institute of Solid Physics,Chinese Academy of Sciences,Hefei 230031
• 出 处: 中国物理快报（英文版）
• 发表日期: 2013年4期

Ferritic/martensitic (FM) steels with 9-12wt％ Cr have been recognized as the primary candidate of structural materials for fusion reactors,advanced fission reactors,and sub-critical accelerator driven systems (ADS).Among all of the FM steels,martensitic T91 (modified 9Cr-lMo) steel has attracted wide attention because of its beneficial properties,such as low corrosion,good thermal conductivity and high resistance to irradiation-induced swelling.Till now,T91 steel has been investigated intensively in various experimental conditions,including liquid metal,[1] supercritical water[2] and neutron irradiation,[3] to obtain a systematical database for engineering applications.Hydrogen is one of the key factors that severely affect the properties of nuclear materials for engineering applications.During the service period in a nuclear environment,hydrogen could be introduced inevitably into structural materials through different ways,including direct penetration from plasma and coolant or production by transmutation reactions.[4] Because hydrogen can induce inteal voids,cracks,precipitations,and interact with other defects,introduction of hydrogen will therefore result in serious degradation of mechanical properties of materials,such as embrittlement and hardening.It is therefore important to understand the dynamic behaviors of hydrogen in nuclear materials.