Embrittlement of steels by hydrogen sulfide. [4340 steel]

Journal Article · Thu Jan 01 04:00:00 EST 1981 · Scr. Metall.; (United States)

DOI:https://doi.org/10.1016/0036-9748(81)90323-9· OSTI ID:6667886

Sieradzki, K

Results of fracture toughness testing of specimens of 4340 steel as a function of H/sub 2/S gas pressure are presented. Observations indicated a delayed crack tip plasticity effect caused by the H/sub 2/S gas. Evidence is presented that indicated that the cracking initiated at the fatigue precrack proceeded in the form of a tunnel crack configuration and that the crack tunneling left strips of material along each edge approx. 10/sup -4/ m in width which finally underwent a tearing or collapse. This strip collapse appeared to result in plastic zone growth under static load in H/sub 2/S. (BLM)

• Research Organization: Ames Lab., IA
• OSTI ID: 6667886
• Journal Information: Scr. Metall.; (United States), Journal Name: Scr. Metall.; (United States) Vol. 15:2; ISSN SCRMB
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360103 -- Metals & Alloys-- Mechanical Properties
360105* -- Metals & Alloys-- Corrosion & Erosion
ALLOYS
CHALCOGENIDES
CORROSIVE EFFECTS
DATA
EMBRITTLEMENT
EXPERIMENTAL DATA
HYDROGEN COMPOUNDS
HYDROGEN SULFIDES
INFORMATION
IRON ALLOYS
IRON BASE ALLOYS
NUMERICAL DATA
STEELS
SULFIDES
SULFUR COMPOUNDS