Studying the Effects of Varying the Pouring Rate on the Casting Defects Using Nondestructive Testing Techniques

In this paper aluminum casting defects when the pouring rate is varying are investigated using green sand casting process by the aid of two nondestructive testing techniques. ten al casting samples have been prepared with different pouring rate for each. then they have been tested using the penetrant test (pt) and the ultrasonic test (ut) to describe the surface and subsurface defects respectively. it was found that when the pouring rate is increases surface defects are significantly increases as the penetrant testing results showed. on the other hand when the pouring rate is increases, there are much less defects appeared internally as the ultrasonic testing showed