Alloy ASTM A710 (HSLA-80) is a co-precipitation hardened steel with a desirable combination of mechanical properties and weldability, making it an excellent candidate for use in structural applications such as bridges, shipbuilding, and pipelines. There have been extensive studies of the strengthening mechanisms, effect of heat treatment and continuous cooling, and kinetics of the precipitation...

The effect of heat treatment at 850 o Con the microstructure and mechanical properties of SAE 1025 carbon steel has been studied. Annealing, normalizing and age-hardening heat-treatments at 850 o C were used for the experimental work. Hardness tests, tensile tests and metallography were carried out on the heat-treated and control samples. The results were further analyzed using the one-way ANOV...

the current study assesses the root causes of hydrogen blisters on low strength carbon steel equipment. for this purpose, some experiments including hardness test, non-destructive test (ndt), metallography, and fractograpghy are conducted. the microstructure of two blisters is assessed by means of optical microscopy and scanning electron microscopy (sem). the microstructural studies show that t...

ASTM A53 steel is medium carbon with 0.3% content and often used for pipe manufacturing. The purpose of this study was to determine the effect post heating temperature variation on bending metallography test weld joint using GMAW process. electrode ER-70S-6. Post variations are 250oC, 300oC 350oC. result showed that welding 350oC postheating produce smallest open defect value. microstructure pe...

AISI 4340 steel is one of the super strong steels that can be selected for different applications. By designing the proper cycles of heat treatment, the optimum microstructure and properties of this steel can be achieved. In this study, different heat treatment cycles were introduced to achieve the optimum microstructure and improve the mechanical and magnetic properties of AISI 4340 steel. The...

*Member of ASM International arburizing has been a popular method for obtaining a unique balance of properties in steels for many years. Steels with low carbon contents are characterized by good toughness and good ductility, but low strength and low wear resistance. By locally increasing the carbon content at the surface, followed by heat treatment to produce a very high hardness in this layer ...

The detection of inhomogeneities such as shrinkage pores, gas pores or cracks in light metals or plastics by means of microfocus x-rays computed tomography (μXCT) has become a common non-destructive testing method in recent years. The evaluation of CT-data of Fe-based materials is more difficult, since they are usually noisy, of poor contrast and the interpretation is affected by measurement ar...