Abstract Duplex stainless steels offer a high strength alternative to steel, while providing excellent corrosion resistance, due their dual-phase microstructure. This microstructure can be significantly influenced during welding, thus the maximum recommended heat input is usually 2.5 kJ/mm. In this research, we inspected (3 kJ/mm) weldability of NSSC 2120 lean duplex which designed and develope...

Numerical simulations of sheet metal forming processes need the establishment of highly reliable results, which in turn need the accurate identification of mechanical properties. In this paper a study is presented on the choice of the characterization function of flow stress-strain curve of sheet metal materials, as well as the selection of the best yield locus, based on experimental uniaxial t...

The mechanical properties of dual Phase steels (DP steels) are strictly related to the spatial distribution and the geometry of the two phases composing the steel, ferrite and martensite. Due to the high costs to obtain images of sections of steel samples, one important industrial problem is the reduction of the number of 2D sections needed to build and simulate a geometric model which may repr...

This paper analysed the change in microstructure after laser welding DP800 and DP1000, effect of welds on low temperatures deformation, strain hardening behaviour when loaded at between ?40 °C 20 using quasi-static rates (1.7 × 10?2 s?1). The results showed that fusion zone (FZ) was fully martensitic due to rapid cooling during welding. Owing severity heat-affected zone, joint efficiencies DP80...

The volume increase and shape change during austenite to martensite transformation in dual-phase (DP) steels are largely accommodated the microstructure by deformation of surrounding ferrite matrix. Accurate estimation transformation-induced via experiments modeling is essential for predicting subsequent mechanical behavior DP steels. This study aims illustrate disadvantages simplifying anisotr...

Creep strength enhanced ferritic (CSEF) steels which contain 9 to 12%Cr have become the steels of choice in many industrial high energy systems. The typical compositions of alloy types P91, P92 and E911 are compared with 12CrMoV in Table 1. These steels are selected for use in applications where high temperature creep can occur because of a favorable balance between cost and properties [1,2]. T...