Influence of Water, Squalane, and Methanol on the Mechanical Strength of a Bearing-Type Steel
Research and development rept.
DAVID W TAYLOR NAVAL SHIP RESEARCH AND DEVELOPMENT CENTER ANNAPOLIS MD
Pagination or Media Count:
The influence of water on the mechanical strength of a bearing-type steel was investigated by subjecting thin sheet specimens to uniaxial tensile stress in the presence of various environments. A small chamber kept liquid or gaseous environments in contact with the specimen while it was subjected to tensile stress at cross-head speeds ranging from 0.01 to 0.00005 centimeter per minute. Results showed that the presence of water in the environment, either as a liquid, a gas, or dissolved in a hydrocarbon liquid, significantly reduces the fracture strain of the steel. There exists a trend toward greater embrittlement at lower strain rates, some specimens breaking in the elastic region. The presence of dissolved oxygen in water appears to reduce somewhat the embrittlement at lower strain rates. Dehydrated hydrocarbon liquid causes a lesser but still measurable reduction in fracture strain. Methanol appears to be as aggressive an environment as water. The results are related to other investigations concerned with the influence of moisture on brittle fracture of steel.
- Properties of Metals and Alloys