Ujian Tanpa Musnah adalah satu teknik ujian di mana ujian dilakukan ke atas bahan tersebut tanpa merosakkan atau memusnahkan bahan tersebut.
Ujian tanpa musnah selalunya dilakukan ke atas bahan untuk mencari keretakan, keliangan pada tuangan keluli, kimpalan, bahagian yang ditempa dan juga dalam komponen elektronik yang mungkin mengakibatkan kesan buruk terhadap komponen tersebut.
Terdapat berbagai jenis ujian tanpa musnah boleh dilakukan seperti secara visual, penggunaan alat optik. Secara mekanikal, ultrasonik, magnetik, elektronik resapan warna dan juga x-ray.
CONTOH:
UJIAN PENEMBUSAN CECAIR ( DYE PENETRANT )
DEFINITION : is a widely applied and low-cost inspection method used to locate surface-breaking defects in all non-porous materials (metals, plastics, or ceramics). The penetrant may be applied to all non-ferrous materials and ferrous materials, but for inspection of ferrous components magnetic-particle inspectionis also preferred for its subsurface detection capability. LPI is used to detect casting, forging and welding surface defects such as cracks,suface porosities, and leaks in new products, and fatigue cracks on in-service components.
BAHAN-BAHAN
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| (REMOVER, PENETRANT AND DEVELOPER) |
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1. Section of material with a surface-breaking crack that is not visible to the naked eye. 2. Penetrant is applied to the surface. 3. Excess penetrant is removed. 4. Developer is applied, rendering the crack visible. |
apa benda ni ?
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