This study evaluates the fatigue life of S960 high-strength steel with laser-cladded layers aluminium bronze, hard chrome, cobalt alloy, and stainless steel, using three-point bending tests. Our results demonstrate that whilethese cladded offer potential for enhanced surface properties, they generally reduce material's due to alterations in heat-affected zone introduction microstructural defects at layer interfaces. The extent reduction varies type layer, highlighting importance optimizing...

Both corrosion and fatigue crack propagation are the most common phenomena degrading metal/steel structures. Therefore, an extensive study is performed on this topic. Namely, results of a numerical analysis made 2D model rectangular specimen containing pit near short edge that arbitrarily oriented towards cyclic tensile loading. Thus, I+II mixed mode conditions created behavior investigated by means concept equivalent stress intensity factor range. Discussion effect various parameters (such...

Laser cladding is a relatively new technology how to combine properties of various materials. Thus, bi-material interfaces are presented in real structures and can affect the fatigue crack propagation. A cracked bar subjected pure tensile loading numerically simulated this work order analyze effect interphase layer between cladded metal steel substrate on growth surface layer. Particularly, influence Young’s modulus stable/unstable edge propagation assessed. Moreover, number cycles necessary...

Results of experimental determination fatigue life S960 steel with surface layers aluminium bronze, hardchrome, cobalt alloy and stainless produced by laser cladding technology are presented in this paper. The is characterized S-N curves determined on specimens subjected to three-point bending discussed relation the influence heat affected zone base material defects microstructure at interface cladded layers.

Both fatigue and corrosion are two phenomena that can be very often found in metallic components. Thus, it is necessary to study their mutual effect. In this paper, a high strength steel specimen was modelled via finite element method order investigate the interaction of crack pit. Particularly, rectangular with pit nearby angled under remote tensile loading deflection angle investigated MTS SED criteria for various lengths inclination angles. The results obtained clearly show how behavior...

This article deals with identifying defects of layered high strength steel materials the help tomography measurement. Test samples were made S960 High Strength Steel to which layers either aluminium bronze, hardchrome, cobalt alloy or stainless applied by a laser cladding technology. The experimental campaign included study morphometric parameters internal in and near bi-material interface region using X-ray micro-tomography their potential influence on fatigue behavior during three-point...

There is evident huge progress in the contact-less systems for measuring deformation by means of photogrammetry especially during last ten years. From forming point view very important that many cases can improve knowledge about material behavior under plastic deformation. This paper deals with characterization and description quite special so-called TWIP (TWinning Induced Plasticity) materials these optical (in this used system ARAMIS). Beside revealing there also effort to find out...

Corrosion is nearly unavoidable phenomenon in most of the metal materials. In this paper, its effect on sharp edge crack propagation under tensile loading investigated. A rectangular plate with a perpendicular and an elliptical corrosion pit nearby modelled via finite elements fracture behavior analyzed. The multi-parameter mechanics concept applied, i.e. higher-order terms Williams expansion are calculated by means over-deterministic method utilized for tangential stress approximation...

Specimens with a bi-metallic interface are formed by laser cladding. The S960 high-strength steel is chosen as substrate material to which layer of either aluminum bronze or hard chrome applied. change fracture-mechanical properties interface, bonding area, and the heat-affected zone tested Vickers microhardness. Young's modulus particular calculated several conclusions drawn that describe behaviors in vicinity bi-material interface.

Finite element parametric analysis is performed on a cracked bi-material bar subjected to pure bending in order investigate the fatigue behaviour of short crack thin protective layer laser-cladded steel substrate. Elastic properties surface are chosen with regard real combinations materials when bronze, nickel or cobalt alloys applied as layers improve basic substrate and influence their mismatch analysed. Classical linear elastic fracture mechanics theory applied, several conclusions stated...

A bi-metal interface between S960 and either aluminium bronze or hard chrome is created using laser cladding technology. This subjected to metallographic analysis, identification of real chemical composition, detection potential stress concentrators microhardness test HV0.5. Tensile strength each type layer determined based on the measurement. Several conclusions describing changes in material properties vicinity bi-material are stated.

Abstract An influence of the bi-material interface between a steel substrate and thin protective layer applied through laser cladding was investigated. A range elastic properties thicknesses were considered to cover behaviour short crack in selected materials such as bronze, nickel or cobalt alloys. The special case terminating directly at investigated, which is connected necessity application generalized approaches linear fracture mechanics. results contribute better understanding response...