Various heat treatments are applied to improve the mechanical properties of steels depending on intended use. In this study, variation fatigue strength H13 hot work tool steel with treatment in a GS 550 bath was investigated. It investigated by applying four different as first preheating, second hardening and hardening. Each batch samples subjected rotating bending test at room temperature afte...

A simple constitutive model for the inelastic response of steel under monotonic and random cyclic loading conditions is developed within the framework of bounding surface plasticity. The particular feature that distinguishes this model from other similar ones is the ability of the bounding surface formulation to describe in a very simple way the initial “plateau” type of perfectly plastic respo...

Manganese is a standard alloy element in many wrought steels, offering improved strength and hardenability and, Hadfield also unique combination of strength, ductility work hardening behaviour. In sintered steels Mn has been used rarely so far because two reasons: one the high oxygen affinity which promotes pickup during heat treatment inhibits removal part through ‘internal getter’ effect. The...

An investigation into the mechanical properties of K55, N80, and P110 steels commonly used for casing drilling was carried out together with microstructural fractographic analysis. The results show that steel consisted almost fully tempered martensite exhibited a synergy combination static tensile, dynamic impact, fatigue crack propagation among three steels, possessing higher limit deeper tole...

Nowadays, industry development requires making new strengthening technologies that allow expanding the rational scope of their application. It is quite promising to use methods combined hardening changing physical and mechanical properties surface layer during successive external actions having different nature: sequential plastic deformation thermal effects. Therefore, objective conducted stud...

The effects of intercritical annealing and subcritical tempering on the mechanical properties and corrosion resistance of mild steel were studied. It was revealed that intercritical annealing followed by quenching resulted in the development of a ferritic-martensitic dual phase (DP) microstructure with high tensile strength, disappearance of the yield-point phenomenon, superior work-hardening b...

Mechanical properties of case modified steels depend decisively on the near-surface gradients residual stresses, microstructures, phases and chemical composition, which are generated by empirically well-established case-hardening techniques. Currently, however, to obtain correlation between structure–property gradients, applied hardening process parameters steels’ overall performance is a very ...

interstial free steels have good formability and also excellent deep drawability. these features make them one of the applicable materials in automotive industry. chemical composition and thermomechanical treatment used to process these steels have important role in final properties of them. in this study, the effect of chemical compositon on texture, anisotropical properties and bake hardenabi...

Quenching & Partitioning (Q&P) steels owe their good strength-ductility combinations to the martensite/austenite (α’/γ) mechanical interactions and formation of mechanically-induced martensite (α′mech) through transformation-induced plasticity (TRIP) effect. An essential role is played by carbon, whose distribution among phases can be modified Q&P route. This study presents a methodology system...