To Perform dye Penetration Test By Chetan H.N (01315607922).pptx

dpe

1. To perform dye/liquid penetration test for given sample with visible and fluorescent dye Submitted To Ms. Ekta Dwivedi Submitted by Chetan H.N (01315607922) L.E

2. OBJECTIVE It is widely used to detect surface discontinuities like cracks, fractures, porosity, grinding defects, incomplete fusion, leaks and flaws in joints. This test serve as an aid in finding irregularities in aluminium , cast iron, brass steel and stainless steel, copper, Mg etc. So, the dye penetration test is suitable for both ferrous and non ferrous materials.

3. MATERIALS VISIBLE DYE SOLUTION FLUORESCENT DYE SOLUTION CLEAN CLOTH/ PAPER TOWELS

4. APPARATUS Surface Cleanser Developer Penetrant

5. NEED OF TEST Surface Crack Detection: Dye penetration tests are effective in locating surface cracks, fractures, and other discontinuities that may be present on the surface of a material. Versatility: Dye penetration testing can be applied to various materials, including metals, plastics, ceramics, and composites. Cost-Effective: Compared to some other NDT methods, dye penetration testing is relatively cost-effective. It doesn't require complex equipment or highly specialized training for the personnel conducting the test.

6. 4. Sensitivity: Dye penetrant tests can detect very small surface cracks or defects that may not be visible to the naked eye. This high sensitivity is crucial for identifying potential issues early on, preventing the progression of defects that could lead to failure during service. 5. Easy Application: The application of dye penetrant is straightforward. The process involves cleaning the surface, applying the penetrant, allowing it to dwell, removing excess penetrant, applying a developer, and then inspecting the surface for indications. The simplicity of the procedure contributes to its widespread use.

7. ADVANTAGES OF DYE PENETRATION TEST Globally-accepted method of non-destructive testing Fast, efficient, portable and inexpensive method for testing large areas and large volumes of parts Able to inspect parts with complex shapes Various types of materials can be inspected such as metallic and nonmetallic, magnetic and nonmagnetic, and conductive and non-conductive materials may be inspected.

8. DISADVANTAGES OF DYE PENETRATION TEST Only able to detect flaws that are open to the surface Cannot examine porous surfaces. Only able to examine clean and smooth surfaces (dirt, grease, paint, metal smearing or rust need to be removed) Requires direct access to the surfaces to be examined

9. PROCEDURE 1) CLEAN THE SURFACE First, Clean the surface so that the surface is open and any defects it contains will be exposed, instead of remaining hidden underneath dirt or other foreign elements.   2)   APPLY THE DYE PENETRANT  I t’s typically sprayed or wiped onto the surface with a brush. After applying the penetrant, inspectors wait for a “dwell period” of five to twenty minutes to allow it to dry.

10. 3. REMOVE EXTRA PENETRANT AND APPLY REMOVER Remove any excess penetrant with a dry rag. After cleaning off extra penetrant, apply a remover to the surface and rub it dry with a fresh clean, dry rag. 4. APPLY DEVELOPER After cleaning and removing the dye penetrant, apply a white developer to the surface. The developer will draw the penetrant from the flaws or cracks on the surface of the material and make them visible. 5. INSPECTION At this point, cracks and other types of defects will be visible either to the naked eye or using white or ultraviolet light, depending on the type of penetrant that was used.

11. The difference between visible dye penetrant and fluorescent dye penetrant: For visible dye penetrants, regular lighting conditions will allow defects to be visible. For fluorescent penetrants, U.V. lights at low ambient lighting will allow defects to be visible.

12. 6. CLEAN THE SURFACE So that it can return to its original state.

13. INTERPRETATION OF RESULT

14. Size and Shape of Indications: The size and shape of the indications provide information about the nature and severity of the defects. Color Intensity: The color intensity of the indications can indicate the depth of the defect. Pattern and Distribution: The pattern and distribution of indications can help identify the potential cause of defects. For example, clustered indications may indicate a manufacturing process issue, while a linear pattern may suggest a crack or discontinuity.