氫原子微印技術應用在2205雙相不銹鋼氫脆之研究

The Study of Hydrogen Embrittlement of 2205 Duplex Stainless Steel by Hydrogen Microprint Technique

本實驗主要利用電化學氫滲透量測、氫原子微印技術及慢速率拉伸試驗，針對2205雙相不銹鋼的氫脆性與氫原子擴散方式的關係進行探討。根據氫原子微印實驗之結果，發現氫原子在2205雙相不銹鋼內部擴散的方式主要為晶格擴散，且在肥粒鐵相中之氫滲透速率和擴散率高於沃斯田鐵相。由預充氫試片金屬斷面的觀察，在肥粒鐵相和沃斯田鐵相中皆有脆性破斷的現象，且發現2205雙相不銹鋼破裂的形式為穿晶破裂。

Hydrogen embrittlement of 2205 duplex stainless steel has been evaluated using electrochemical permeation measurement, hydrogen microprint technique and slow strain rate tensile test in this study. Hydrogen transport in 2205 duplex stainless steel is mainly lattice diffusion in ferritic phase and was confirmed by hydrogen microprint technique. The fractography of precharged specimen shows brittle fracture in both the ferritic and austenitic phases.