Indian Journal of Science and Technology

Abstract

Background/Object: Non-destructive Testing (NDT) methods are valuable tools in quality assurance of weldments in engineering and technology. The objective of this paper is to evaluate the structural health monitoring of the weldments through NDT methods. Methods/Analysis: The samples taken for these studies are extensively used in Aerospace and industrial applications. The dimensions of fabricated samples of stainless steel and mild steel is 300 mm x 180 mm x 10 mm, D3 tool steel is 180 mm x 150 mm x 25 mm, Aluminum is 150 mm x 120 mm x 10 mm and Titanium is 160 mm x 60 mm x 2 mm. These samples are subjected to Gas Tungsten Arc welding (GTAW) during welding artificial defects are incorporation by altering the weld parameters. The profile of weld defects is studied by using basic Non-Destructive Testing techniques. Findings: Defects which are open to surface and subsurface defects up to 6mm depth are detected by Visual Inspection (VI), Liquid Penetrant Test (LP) and Magnetic Particle Inspection (MPI) techniques. Ultrasonic – B scan NDT technique is adapted for study of thickness profile of weld region of weldments found distinct result in aluminum weldments. Orientation and Internal of defects of the weldments were detected by Gamma ray Radiography and Ultrasonic Testing methods found forging material inclusion in SS material, Aluminum weldments. Application/Improvements: These evaluation studies through Nondestructive Testing techniques are much useful for structural health monitoring of the weldments.

Keywords: Characterization, Evaluation, Non Destructive Testing, Weldments, Defects