Characterization of Mechanical Properties and Residual Stress in API 5L X80 Steel Welded Joints

Journal Article · Mon Jan 15 04:00:00 EST 2018 · Journal of Materials Engineering and Performance

DOI:https://doi.org/10.1007/S11665-017-3090-Z· OSTI ID:22860688

Fonseca, Maria Cindra ^[1]

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1. Universidade Federal Fluminense – UFF, Departamento de Engenharia Mecânica/PGMEC (Brazil)

The use of high-strength and low-alloy steels, high design factors and increasingly stringent safety requirements have increased the operating pressure levels and, consequently, the need for further studies to avoid and prevent premature pipe failure. To evaluate the possibility of improving productivity in manual arc welding of this type of steel, this work characterizes the mechanical properties and residual stresses in API 5L X80 steel welded joints using the SMAW and FCAW processes. The residual stresses were analyzed using x-ray diffraction with the sin{sup 2}ψ method at the top and root of the welded joints in the longitudinal and transverse directions of the weld bead. The mechanical properties of the welded joints by both processes were characterized in terms of tensile strength, impact toughness and Vickers microhardness in the welded and shot peening conditions. A predominantly compressive residual stress was found, and shot peening increased the tensile strength and impact toughness in both welded joints.

• OSTI ID: 22860688
• Journal Information: Journal of Materials Engineering and Performance, Journal Name: Journal of Materials Engineering and Performance Journal Issue: 1 Vol. 27; ISSN 1059-9495; ISSN JMEPEG
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ARC WELDING
IMPACT STRENGTH
LOW ALLOY STEELS
MICROHARDNESS
RESIDUAL STRESSES
SHOT PEENING
TENSILE PROPERTIES
WELDED JOINTS
X-RAY DIFFRACTION