Hydrogen induced yield strength reduction and hydrogen induced delayed plasticity

✍ Scribed by Wu-Yang Chu; Shi-Qun Li; Shur-Yahn Ju

• Book ID: 103067751
• Publisher: Elsevier Science
• Year: 1982
• Tongue: English
• Weight: 133 KB
• Volume: 16
• Category: Article
• ISSN: 0013-7944
• DOI: 10.1016/0013-7944(82)90091-1

✦ Synopsis

ment of hydrogen delayed plasticity. It is concluded therefore that hydrogen induced delayed plasticity is the necessary and sufficient condition of the hydrogen induced delayed cracking for Mode I crack.

In all the environments used, the K rscT (or Krx) is increased and da/dt is decreased with the decrease in .l_. ... strength of the steel. The X,scc is increased and daidr decreased with the anodic polarization in water or the addition of the inhibitor (0.1 NKaCr&).

On the other hand. the Krscc is decreased and dnldt increased with cathodic polarization in water. The K,scc is the lowest and the da/d! the highest for stress corrosion in saturated aqueous solution of H2S or electrolytic charging during loading. It is also shown by metallographic shadowing observations that another mechanism of hydrogen induced cracking, i.e. hydrogen pressure mechanism is operative during severely el~ctrolytical charging.