Numerical analysis of laser welding with consideration analytical methods of determining phase transformations and mechanical properties of welded joint

Abstract

The numerical analysis of laser welding process with consideration analytical methods determining phase transformations and mechanical properties of welded joints are presents in this paper. The analytical CCT diagram and final structural composition of S355 steel are presented. The empirical relations presents in paper are determined by chemical compositions investigated steel and cooling rate between temperatures 800-500°C (t8/5). Phase composition and mechanical properties each of structures of steel in weld and heat affected zone (HAZ) are determined on the basis of analytical methods. Laser welded flat is used in numerical simulations in ABAQUS. Mathematical modes of volumetric welding source are used in the calculations. Temperature fields, shape and size of melting zone for selected points in the cross-section of the joint are determined on the basis of thermal cycles obtained numerical.

Effect of Local Laser Treatment on the Strengthening of Thin-Walled Structures Fabricated from Non-Alloy Steel

“…These diagrams characterise the decomposition of austenite at various cooling rates. The data from these diagrams can provide more precise information on the temperature intervals for phase transformations during continuous cooling and the resulting structural components that are formed from such transformations [ 37 , 38 ]. In complex systems, computational techniques such as CALPHAD (Computer Coupling of Phase Diagrams and Thermochemistry) are utilised to model the behaviour of multicomponent phases.…”

Influence of the face surface shape of the piston on the limit value of compaction stress in the process of dry ice agglomeration

“…During the review of the available literature, it was noticed that published results of FEM analysis of various processes are often verified or performed on the basis of empirical research [25][26][27]. In this paper has decided to use a similar approach to numerical analysis.…”