Effects of Heat Input Conditions on the Local Thermophysical Properties of Super Duplex Stainless Steels

José Adilson de Castro; Gláucio Soares da Fonseca; D.S.S. Almeida; L.C.R. Lopes; Carlos Roberto Xavier; Elizabeth Mendes de Oliveira

doi:10.4028/www.scientific.net/MSF.930.317

Paper Titles

Micromechanical Modeling of Dual-Phase DP600 Steel Sheet Plastic Behavior Based on a Representative Volume Element Defined from the Real Microstructure
p.293

Modeling and Simulation of Nucleation and Growth Transformations with Nucleation on Interfaces of Kelvin Polihedra Network
p.299

Evolution of Individual Grains in 3d Microstructure Generated by Computational Simulation of Transformations Involving Two Phases
p.305

Micromechanical Modeling of DP600 and DP800 Steels Plastic Behavior Based on the Mori-Tanaka Homogenization Method
p.311

Effects of Heat Input Conditions on the Local Thermophysical Properties of Super Duplex Stainless Steels
p.317

Study of Wear on Nicraly Coating Sprayed by HVOF on 316 Steel and Laser CO₂ Remelting Process
p.322

Effect of Niobium and Heat Treatment on the Microstructure and Mechanical Properties of SAE 8620 Steel
p.327

Effect of Controlled Cooling after Hot Rolling on the Mechanical Properties of a Low Carbon Niobium Microalloyed Steel Wire Rod
p.333

Effects of Different Annealing Times on Microstructure and Tensile Properties of Joints Welded 5052 Aluminum Alloy in Marine Industry
p.339

HomeMaterials Science ForumMaterials Science Forum Vol. 930Effects of Heat Input Conditions on the Local...

Effects of Heat Input Conditions on the Local Thermophysical Properties of Super Duplex Stainless Steels

Abstract:

The thermal properties of the super duplex stainless steels are strongly affected by the thermal history when welding procedure are applied leading to substantial changes on the mechanical properties of the welding region. The controlled dual phase microstructure (ferrite and austenite) guarantee excellent mechanical properties such as mechanical strength and corrosion resistance, in addition to small thermal expansion coefficient and high thermal conductivity. In this research a model able to predict the thermal history of the welding pieces coupled with local mechanical properties developed during welding procedure is developed. The model was verified by measured temperature profile and used to predict local properties such as grain size evolution, hardness and mechanical strength. An inverse method was implemented to obtain the parameters fitting for the grain growth evolution, hardness and yielding strength compatible with the final microstructure and grain size measured using SEM images and stereological techniques.