Evaluation of hydrogen embrittlement in ODS-Cu, Cu–Cr–Zr, and Cu–Cr alloys using slow strain rate technique test

• DOI: 10.1016/j.nme.2024.101580
• Publication Date: 2024-01-11T09:46:07Z
• Authors: M. Hatakeyama; Y. Asai; D. Nakato; M. Nishimura; Y. Hatano; S. Sunada; K. Sato
• Keywords: Embrittlement

Precipitation-hardened Cu–Cr–Zr alloy is proposed as a heat sink material for various components of the ITER owing to its high strength, conductivity, and superior resistance against neutron irradiation. Oxide-dispersion-strengthened copper (ODS-Cu) was selected candidate material. Hydrogen embrittlement Cu–Cr–Zr, Cu–Cr, ODS-Cu (GlidCop® CuAl60) alloys evaluated using slow strain rate technique (SSRT) in 0.1 M sodium sulfate (Na2SO4) solutions under cathodic hydrogen charging or after D2 gas exposure. Thermal desorption spectroscopy (TDS) measurements were performed estimate differences hydrogen-trapping sites methods. According TDS results, quantity retained exceeded that other by an order magnitude because trapping at grain boundaries particle/matrix interface. tend trap more than Cu–Cr addition Zr. As result SSRT, no observed any alloy, regardless method. All exhibited excellent conditions adopted this study.