Microstructure and fatigue behaviour of spin-arc welded AISI C1018 low carbon steel

Abstract

This work investigates the fatigue performance of 10 mm AISI C1018 low carbon steel plates welded with ER70S-6 using a gas metal arc welding-based spin-arc welding process. Welded joint microstructure is characterized by bainite, acicular ferrite, and allotriomorphic ferrite along with pearlite in the ferritic matrix. The tensile strength of the weld metal was comparable with base metal and meets the mechanical property requirements in accordance with the ASTM A311/A311M-04 (2020) standard. The fatigue strengths of base metal and weld metal are 121 and 126 MPa, respectively, after sustaining 106 cycles. During cyclic loading, fracture surfaces were distinctly noticed as the crack initiation, crack propagation, and final rupture regions. The decrease in alternating stress increased the fatigue cycles to final rupture, and the nature of fatigue fracture was ductile with dimples and voids.

Relación entre el crecimiento y la temperatura en la punta de la grieta por fatiga en acero AISI 1018

“…El material utilizado en este estudio es un acero AISI 1018. Este tipo de acero es muy usado en construcción de puentes, tuberías y edificios [22]. El acero es de tipo estructural y de bajo contenido de carbono.…”

Investigations on microstructural and mechanical properties of BSK 46 steel weldments

“…Conventional welding techniques such as shielded metal arc welding, gas tungsten arc welding, gas metal arc welding (GMAW) and submerged arc welding are widely used for joining the BSK 46 steels. [9][10][11][12][13][14][15][16][17][18] GMAW is preferred over the other arc welding processes because of its cost-effectiveness, higher filling rate, relatively easy to operate and higher productivity. [19][20][21][22][23][24] In GMAW, the arc generated between the workpiece and wire electrode melts the workpiece and produces a permanent joint.…”