Influence of parameters on the microstructure of a duplex stainless steel joint welded by a GMAW welding process

作     者：Sandra Chacón-Fernández Antonio Portolés García Gerardo Romaní Labanda Sandra Chacón-Fernández;Antonio Portolés García;Gerardo Romaní Labanda

作者机构：Universidad Politécnica de Madrid Escuela Técnica Superior de Ingenieros Industriales UPM 

出 版 物：《Progress in Natural Science:Materials International》 (自然科学进展·国际材料(英文))

年 卷 期：2022年第32卷第4期

页      面：415-423页

核心收录：

学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0802[工学-机械工程] 080201[工学-机械制造及其自动化] 

主　　题：Welding Heat input GMAW Duplex stainless steels (DSS) Finite element model (FEM) 

摘      要：Duplex stainless steels(DSSs) are widely used in industry for their desirable properties. Any fusion welding technique modifies the microstructure and, consequently, the properties of the material. This paper presents a parametric study of the variables that determine the energy contribution(current, voltage and welding speed) and the structural modifications produced during gas metal arc welding. The analysis comprises metallographic study,phase balance, dimensioning of the weld beads and tensile and hardness tests. The influence of the variables studied on the thermal cycles obtained(temperatures reached and cooling rate) was determined by using a finite element model. The results showed that, in addition to the indicated parameters, the parameter power transfer per volume(W/m3) and the geometry in the bead must be controlled due to their influence on the heat flow distribution and phase balance.