High-strength copper-based alloy with excellent resistance to hydrogen embrittlement

Junichiro Yamabe, Daiki Takagoshi, Hisao Matsunaga, Saburo Matsuoka, Takahiro Ishikawa, Takenori Ichigi

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

High-pressure components are generally designed with safety factors based on the tensile strength (TS) of the material; accordingly, materials with higher TS permit designed components with thinner walls, which reduce the weight and cost of the parts. However, many high-strength metals are severely degraded by hydrogen. To this point, efforts to develop a high-strength metal with a TS far beyond 1000 MPa and excellent resistance to hydrogen embrittlement (HE) have failed. This study introduces a high-strength metal with an excellent HE resistance, composed of a precipitation-hardened copper-beryllium alloy with the TS of 1400 MPa. Slow strain rate tensile (SSRT) tests of both smooth and notched specimens were performed in 115-MPa hydrogen gas at room temperature (RT). The alloy had a relative reduction in area RRA ≈ 1 and a relative notch tensile strength RNTS ≈ 1, without degradation in either characteristic.

Original languageEnglish
Pages (from-to)15089-15094
Number of pages6
JournalInternational Journal of Hydrogen Energy
Volume41
Issue number33
DOIs
Publication statusPublished - Sep 7 2016

All Science Journal Classification (ASJC) codes

  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Condensed Matter Physics
  • Energy Engineering and Power Technology

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