L52340 Small-Scale Tensile Charpy V-Notch and Fracture Toughness Tests

This is the fourth of seven reports dealing with small-scale mechanical testing; an outline of the reporting flow is given in the Introduction to the Summary of Mechanical Properties report 277- T-08. This report presents the results of tensile tests and conventional toughness tests, both notch toughness (Charpy) and fracture toughness (through-thickness-notched specimens), and discusses correlation with microstructure.

In this study, the mechanical properties achieved in single- and dual-torch GMAW-P X100 pipe welds were characterized with conventional small-scale testing methods. The main objectives were to further develop an all-weld-metal tensile testing protocol and to assess toughness to provide baseline data for understanding the factors that control both weld metal (WM) and heat affected zone (HAZ) microstructure and properties in pipeline girth welds.