Assessment by destructive and non-destructive approach to characterize 90/10 cupronickel weldments

Abstract Weld defects are analyzed by standard non-destructive method (acoustic emission testing, infrared testing, ultrasonic testing, radiographic testing) which are in 2-D. With the assistance of X-ray Computed Tomography (XCT), it is viable to examine different class of flaws in 3-D. XCT is a potent tool for 3D representation and measurement of defects in the weldments. XCT facilitate to conceptualize micro pores and their position in 3-D spaces in the fusion zone. In the present investigation, 90/10 cupronickel micro-plasma arc welded butt joints are assessed by uniaxial tensile testing (Destructive Testing) and X-ray Computed Tomography (XCT) analysis (Non-Destructive Testing). Results of XCT analysis is compared with tensile testing results for joints prepared at low value (40.44 J/mm) and high value (104.76 J/mm) of heat input; further results are correlated with the Scanning Electron Microscope (SEM) images obtained from fractography analysis. Appropriate evidence indicates that joints prepared with lower value of heat input yielded lower number of pores, high joint strength and high ductility as compared to joints prepared with higher value of heat input.