Results for metals knowledge: 458

An example of the design of a new steel type is steel with intermetallic phases. This steel contains needle-like martensite laths, smaller than 1?m, which provide high yield strength and good toughness ...

Crack arrest in Q+T steels has been caused by large energy required for the fracturing of carbides. Since carbides have large Young鈥檚 modulus, the energy spent for their fracture is very large. This ...

The first and the oldest type of steel used as structural steels are plain carbon steels. The increase in strength was based on increase in carbon content. Carbon in Fe is a solid solution, with limited ...

Traditional design implements the safety factor (SF) as a safety measure of a structure. The allowed stresses are calculated from the Yield Stress (YS) or Ultimate Tensile Stress (UTS) and SF ratio. This ...

Studies of the basic structural changes that occur when a metal is subjected to cyclic stress have found it convenient to divide the fatigue process into the following stages ...

The aircraft industry has leaded the effort to understand and predict fatigue crack growth. They have developed the safe-life or fail-safe design approach. In this method, a component is designed in a ...

Correlations were found between the fractography of stress corrosion cracked (SCC) surfaces and the macrostructure of shielded metal arc weldments of a NiCrMo steel. The fractography of the stress ...

The observation of second-phase particles such as strengthening precipitates and nonmetallic inclusions on the fracture surface of steel specimens clearly indicates their importance in the overall ...

When studying a failure, great care must be used to avoid destroying important evidence. Detailed studies often require careful documentation of the service history (time, temperature, loadings and ...

Many elements of fracture have been used to describe and categorize the types of fractures encountered in the laboratory and in service. These elements include loading conditions, rate of crack ...