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

9 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

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hydrogen embrittlement
Hydrogen embrittlement
high strength
tensile strength
Tensile strength
Copper
copper
beryllium alloys
Beryllium alloys
Metals
metals
thin walls
Hydrogen
safety factors
copper alloys
Safety factor
Copper alloys
hydrogen
notches
tensile tests

All Science Journal Classification (ASJC) codes

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

Cite this

High-strength copper-based alloy with excellent resistance to hydrogen embrittlement. / Yamabe, Junichiro; Takagoshi, Daiki; Matsunaga, Hisao; Matsuoka, Saburo; Ishikawa, Takahiro; Ichigi, Takenori.

In: International Journal of Hydrogen Energy, Vol. 41, No. 33, 07.09.2016, p. 15089-15094.

Research output: Contribution to journalArticle

Yamabe, Junichiro ; Takagoshi, Daiki ; Matsunaga, Hisao ; Matsuoka, Saburo ; Ishikawa, Takahiro ; Ichigi, Takenori. / High-strength copper-based alloy with excellent resistance to hydrogen embrittlement. In: International Journal of Hydrogen Energy. 2016 ; Vol. 41, No. 33. pp. 15089-15094.
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