The processing of advanced multiphase high strength steels often includes isothermal treatments around the martensite start temperature (Ms) for achieving a refined microstructure comprising bainite-austenite and/or bainite-martensite-austenite phase constituents. objective this research work was to investigate structure-property relationship medium carbon, high-silicon DIN 1.5025 steel (Fe-0.5...

The comparative study of submerged arc welding (SAW) and laser hybrid (LHW) was carried out for a 690 MPa high strength steel with thickness 20 mm. Microstructure ductile–brittle transition temperature (DBTT) evolution in welded zone were elucidated from the aspect crystallographic structure, particularly, digitization visualization 24 variants. impact toughness each micro LHW joint is better t...

Abstract The microstructure evolution and impact toughness of the coarse grain heat-affected zone (CGHAZ) TiNbV microalloyed steels were investigated by using a thermal simulation test. samples treated with various simulated welding cycles. phase constituents sizes analyzed electron backscatter diffraction analysis. CGHAZ consisted ferrite, acicular pearlite, bainite. have higher under lower he...

: Consistent with the wishes of the Conference Organisers, the basic theory of the bainite reaction including the crystallographic, thermodynamic and kinetic framework is described, together with the development of fine bainite and its properties.

the influence of aluminium on the microstructure of austempered ductile cast iron (adi) has been studied. anumber of irons of different compositions have been made by green sand casting and gravity die casting ofappropriate design to provide the experimental materials. austenitising was carried out at different temperaturesand holding times for a variety of experimental irons to achieve suffici...

The aim of the present research is to simulate the heat treatment process of the autogenous grinding (AG) shell liner of Cr-Mo steel in different quenching media (still air, air blowing, oil and water) using ABAQUS software, in order to calculate the cooling curves. In this regard, the microstructure and hardness for each arbitrary point within the mill liner's bulk could be predicted based on ...

With the rapid development of low-carbon high strength steel, higher requirements are put forward for matching welding consumables. The deposited metals with 0.62–2.32% Cu addition was prepared by tungsten inert gas via metal cored wire. effect element on microstructure and mechanical properties were investigated. multiphase consists bainite, martensite, residual austenite, martensite-austenite...

A coarse grained constituent recently discovered in high strength steel weld metals – Coalesced Bainite – was investigated with a serial section procedure for three-dimensional (3D) analysis using Focused Ion Beam (FIB) milling. Image planes of a coalesced bainite grain, 0.4 μm apart were acquired using the FIB. The data collected was then used to create a 3D model of the coalesced bainite grai...