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Engineering metallurgy non destructive testing ppt.pptx
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- 2. • INTRODUCTION • Testingand analysis technique used by in dustry to evaluate the properties of a material, component, structure. • It is a highly valuable technique that can save both money and time in product evaluation, troubleshooting and research. • Innovations here have impacted on medical imaging, echocardiography, ultra sonography, digital radiography.
- 3. CONTENTS RADIOGRAPHY SULPHUR PRINTING MAGNETIC PARTICLETESTING 01 02 03 • PROCEDURE • APPLICATIONS • PROCEDURE • APPLICATIONS • PROCEDURE • APPLICATIONS
- 4. SULPHUR PRINTING Procedure After results Impressions Etching Developingof the paper Solution preparation 1 2 3 4 5 Clean the sample thoroughly. This is done to remove all the foreign particles and nothing reacts with the chemicals used. We need a solution of 5% sulphuric acid and bromine. This solution is used for dipping a bromide paper in it. Then this bromide paper is pressed on the metallographic specimen of steel sample After the test, we observe dark spots on the bromide paper. More the number of spots, more is the Sulphur content. After the test, we in order to see the spots ,develop the paper using photographic liquid.
- 5. APPLICATIONS This is usedfor the determination of sulphur content in the steels. We cant completely remove sulphur but can reduce the quantity Certain physical irregularities, such as cracks and porosity, by printing on photo- sensitive paper The sulphur amount can be reduced by addition of manganese.
- 6. RADIOGRAPHY Procedure After results Transmission Passing ofthe beam Study of the scattered beams Interference 1 2 3 4 5 During a radiographic procedure, an x-ray beam is passed through the body. A portion of the x- rays are absorbed or scattered by the internal structure Remaining of the remaining x-ray pattern is transmitted to a detector After the test, we observe various wavelengths of scattered light according to the defects and microstructures. The recoding of the pattern may occur on film or through electronic means. And these are later studied by scientists.
- 7. APPLICATIONS From having theability to inspect, quantify and qualify failures and defects to being able to access internal and external geometry, radio- graphy is widely used. • Aerospace – ex. Castings • Medical Devices – ex. Stints • Automotive – ex. Piston head • Military & Defence – ex. Ballistics • Manufacturing – ex. Pre-production qualification of part • Packaging – ex. Structural integrity/leak or failure analysis or pack age
- 8. MAGNETIC PARTICLE TESTING Procedure Afterresults Leakage Magnetic current passing Wet surfcacing Detection of cracks 1 2 3 4 5 First, we start by running magnetic current through the component. Any cracks or defects in the material will interrupt the flow of current and will cause magnetism to spread out from them This will create a “ flux leakage field” at the site of the damage. This provides a visible indication of theapproximate size and shape of the flaw. If there are any flaws on or near the surface, the flux leakage field will draw the particles to the damage site.
- 9. ADVANTAGES •Can detect bothsurface and near-surface indications •Can inspect irregularly-shaped parts •Pre-cleaning of the asset to be inspected is less essential than in other inspection methods, as existing contaminants should not affect flaw detection •Quick to be employed and lower cost than other NDT methods •Real-time results, as indications are visible directly on the material’s surface •Portable inspection method makes it ideal for field inspection services
- 10. APPLICATIONS Wet Fluorescent MTInspection Applications •Fatigue Cracks •Flakes •Grinding Cracks •Inclusions in aerospace blooms, billets, and bars •Laps •Quenching Cracks •Seams •Shrink Cracks •Stress Corrosion Cracking •Tears •Welding Defects
- 11. Thank you Presented by: MadhurRathi PB 24 Aishwarya Sawkar PB 26 Kush Shah PB 31