Inspection Engineernde
Inspection EngineerForum Replies Created
Tensile Testing: This test involves pulling a fiber to its breaking point to determine its tensile strength and elongation at break. The fiber is secured between two grips and subjected to a controlled pulling force until it breaks. Tensile testing is used to determine the fiber’s strength and its ability to withstand strain.
Abrasion Testing: This test involves rubbing a fiber against a rough surface to determine its abrasion resistance. The fiber is rubbed against a specified surface with a specified weight and force, and the amount of fiber loss is measured. Abrasion testing is used to determine the durability of a fiber.
Flexural Testing: This test involves bending a fiber to determine its flexural strength and modulus of elasticity. The fiber is supported at two points and subjected to a bending force until it breaks. Flexural testing is used to determine the fiber’s stiffness and flexibility.
Impact Testing: This test involves dropping a weight onto a fiber to determine its impact strength. The fiber is clamped to a support and a weight is dropped onto it from a specified height. The amount of energy absorbed by the fiber is measured. Impact testing is used to determine the fiber’s ability to withstand sudden shocks.
Compression Testing: This test involves compressing a fiber to determine its compressive strength and modulus of elasticity. The fiber is placed between two plates and subjected to a compressive force until it buckles. Compression testing is used to determine the fiber’s ability to withstand compressive forces.
I am no expert in MFL but I can provide this link that might explain some things:
https://ndtinspect.com/groups/magnetic-flux-leakage/documents/
Its Floormap3Di Training Presentation Notes. You can download and have a read.
Loking at Sectorial, it does look like it follows side wall fusion face but A scan signal from it represents crack like defect therefore, I would go with cracking.
A head shot would be current flow and the alternative current flow through a central conductor wouldn’t detect transverse defects.
You need induced magnetism/magnetic flow with current flowing in a circular direction to induce longitudinal magnetism.
You need to do the calculations but I suspect the current required for a coil or encircling cables would be impractical.
A small yoke on a a rod or buggy could apply local magnetisation but you also need to apply fluorescent particles and have a camera. These aren’t technically difficult but not a simple task either and probably fairly slow.1. PAUT hard wedge is not suit for casting inspection due to the coupling, especially for concave or limited structure.
2. if necessary, ATFM technique is OK and is better for wave surface, or hydroform probe may solve your problem.Maybe you can look into Olympus A24 series phased array probes…
