Mechanical Properties of Micro-Zones of X80 Pipeline Welding Joints

Abstract:

Due to the inhomogeneous mechanical properties of laser welding joints, it is necessary that the local mechanical properties of welding joints are measured for the assessment of the whole welding joints. Especially for mechanical properties test in heat affected zone of welding joints. Two methods of micro shear test and hardness test to measure mechanical properties of micro-zones were introduced. Using these two methods the mechanical properties of the micro-zones of X80 pipeline welding joint are determined and compared. The results showed that the micro shear test could be intuitively, quantitatively and continuously describe the strength and plasticity of the regional heterogeneity distribution, suitable for the assessment of the mechanical properties and fracture toughness of welding joints.

• Periodical: Materials Science Forum (Volume 898)
• Pages: 1088-1093
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.898.1088
• Online since: June 2017
• Authors: Xiao Jiang Guo*, Jian Xiao, Bi Lin Cai, Guang Bin Zhang
• Keywords: Hardness Test, Mechanical Properties of Micro-Zones, Micro Shear Test, Welding Joint

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