Hydrogen embrittlement of a super duplex stainless steel in acid solution

Research output: Contribution to journalArticle

46 Citations (Scopus)

Abstract

Super duplex stainless steel (SDSS) is a good choice of material when resistance to harsh environments is needed. Despite the material’s excellent corrosion resistance and high strength, a number of in-service failures have been recorded. The root cause of these failures was environmentally induced cracking initiated at manufacturing and in-service metallurgical defects. In this study the hydrogen embrittlement of pre-strained super duplex stainless steel specimens was investigated after 48 h cathodic charging in 0.1 M H2SO4. The metallurgical changes that resulted from four levels of cold work (4, 8, 12, and 16% plastic strain) were considered and their effect on the embrittlement of the SDSS alloy was investigated. After hydrogen charging, the specimens were pulled immediately to failure and the mechanical properties evaluated. The obtaining fracture morphology was investigated using low and high magnification microscopy. Experimental results indicated that charging the super duplex stainless steel alloy with hydrogen caused varying degrees of embrittlement depending on cold work level. Increasing cold work resulted in a reduction of the elongation to failure. Microscopic investigation confirmed the significant effect of cold work on the hydrogen embrittlement susceptibility of the super duplex stainless steel alloy investigated.

Keywords: Super duplex stainless steel; Cold work; Hydrogen embrittlement

Original languageEnglish
Pages (from-to)6455-6464
Number of pages10
JournalInternational Journal of Hydrogen Energy
Volume35
Issue number12
Early online date24 Apr 2010
DOIs
Publication statusPublished - Jun 2010

Fingerprint

hydrogen embrittlement
Hydrogen embrittlement
stainless steels
Stainless steel
acids
Acids
Alloy steel
charging
embrittlement
Embrittlement
Hydrogen
hydrogen
high strength
magnification
corrosion resistance
elongation
Corrosion resistance
Elongation
Plastic deformation
Microscopic examination

Keywords

  • super duplex stainless steel
  • cold work
  • hydrogen embrittlement

Cite this

Hydrogen embrittlement of a super duplex stainless steel in acid solution. / Alhoud, Abdul Rezeg; Renton, Neill Charles; Deans, Wiliam F.

In: International Journal of Hydrogen Energy, Vol. 35, No. 12, 06.2010, p. 6455-6464.

Research output: Contribution to journalArticle

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AU - Alhoud, Abdul Rezeg

AU - Renton, Neill Charles

AU - Deans, Wiliam F

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N2 - Super duplex stainless steel (SDSS) is a good choice of material when resistance to harsh environments is needed. Despite the material’s excellent corrosion resistance and high strength, a number of in-service failures have been recorded. The root cause of these failures was environmentally induced cracking initiated at manufacturing and in-service metallurgical defects. In this study the hydrogen embrittlement of pre-strained super duplex stainless steel specimens was investigated after 48 h cathodic charging in 0.1 M H2SO4. The metallurgical changes that resulted from four levels of cold work (4, 8, 12, and 16% plastic strain) were considered and their effect on the embrittlement of the SDSS alloy was investigated. After hydrogen charging, the specimens were pulled immediately to failure and the mechanical properties evaluated. The obtaining fracture morphology was investigated using low and high magnification microscopy. Experimental results indicated that charging the super duplex stainless steel alloy with hydrogen caused varying degrees of embrittlement depending on cold work level. Increasing cold work resulted in a reduction of the elongation to failure. Microscopic investigation confirmed the significant effect of cold work on the hydrogen embrittlement susceptibility of the super duplex stainless steel alloy investigated. Keywords: Super duplex stainless steel; Cold work; Hydrogen embrittlement

AB - Super duplex stainless steel (SDSS) is a good choice of material when resistance to harsh environments is needed. Despite the material’s excellent corrosion resistance and high strength, a number of in-service failures have been recorded. The root cause of these failures was environmentally induced cracking initiated at manufacturing and in-service metallurgical defects. In this study the hydrogen embrittlement of pre-strained super duplex stainless steel specimens was investigated after 48 h cathodic charging in 0.1 M H2SO4. The metallurgical changes that resulted from four levels of cold work (4, 8, 12, and 16% plastic strain) were considered and their effect on the embrittlement of the SDSS alloy was investigated. After hydrogen charging, the specimens were pulled immediately to failure and the mechanical properties evaluated. The obtaining fracture morphology was investigated using low and high magnification microscopy. Experimental results indicated that charging the super duplex stainless steel alloy with hydrogen caused varying degrees of embrittlement depending on cold work level. Increasing cold work resulted in a reduction of the elongation to failure. Microscopic investigation confirmed the significant effect of cold work on the hydrogen embrittlement susceptibility of the super duplex stainless steel alloy investigated. Keywords: Super duplex stainless steel; Cold work; Hydrogen embrittlement

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