Dec 20, 2017 · Friction welding is more economical and time-consuming, which requires a low input of energy and high production rate with less material wastage in joining dissimilar metals or alloys. During friction welding of steels, the weld interface produces heat with temperature range of 900 to 1300°C. 3. Geometry and material constraint effects on fracture Apr 13, 2016 · Because of the complexity of geometry and material constraint effects on the crack tip stress fields and fracture resistance behavior of welded joints, the trend is towards the application of damage mechanics models for computing the fracture resistance curve (Zerbst et al. 2014). It is well known that the ductile crack initiation and growth in metals and welded joints are the result of
Welded steel structures are subjected to cyclic loading conditions from high-cycle fatigue (HCF) to low-cycle fatigue (LCF), or even to extremely low-cycle fatigue (ELCF), whereas uniaxial loading results in monotonic fracture (MF). Metallurgical and Stress State Factors Which Affect the
- AbstractBackground and IntroductionEffect of Chemical Composition on Microstructure and PropertiesImplications of Controlled Composition on PerformanceConclusionsDeclarationEPRI-supported research has identified critical material information regarding the factors affecting the performance of creep strength-enhanced ferritic steels, in general, and Grade 91 steel, in particular. EPRI recommendations emphasize that a five-point, integrated strategy should be used for the effective life management of components fabricated from tempered martensitic steels. This integration promotes a balanced use of resources which, when properly focused, reduces uncertainty regarding creep and fraFatigue Resistance and Failure Behavior of Penetration and Apr 13, 2021 · The fracture location is the result of competition between the local stress and fatigue resistance in welded joints, and the fatigue strength of welded joints depends on the fatigue resistance of their fracture regions [17,18,19,20]. The fatigue fracture of the penetration and non-penetration joints was initiated at the welding fusion boundary on the lap interface of the lower lap plate, which indicated that the fusion boundary of the two laser welded
Numerical Investigation on Fracture Initiation Properties Mar 31, 2020 · Fracture toughness property is of significant importance when evaluating structural safety. The current research of fracture toughness mainly focused on crack in homogeneous material and experimental results. When the crack is located in a welded joint with high-gradient microstructure and mechanical property distribution, it becomes difficult to evaluate the fracture toughness behavior
Jun 24, 2017 · 800 MPa strength cold rolled annealed DP steels was welded by different heat inputs (666 J/mm) using 6 kW fiber laser, to study the microstructure and fracture behavior of laser welded joints with sub-micron scale soften zone. The microstructure and fracture morphology of welded joints were observed by scanning electron microscope (SEM) and optical microscope (OM).