Nondestructive test of powder metallurgy parts

ABSTRACT Powder metallurgy is a production method for manufacturing metal and nonmetal parts. By applying nondestructive tests to powder metallurgy parts the production process can be controlled. After detecting flawed parts, the source of the problem is investigated. In this work, production, specification, application, flaws of powder metallurgy parts were summarized. Nondestructive test methods which are applied to powder metallurgy parts for detecting faults were described. Density, porosity, hardness, tensile strength, metallurgical investigation and ultrasonic velocity tests were applied to parts and tensile test bars which were manufactured in Toz Metal Company. Graphics between ultrasonic velocity and density, porosity, hardness, tensile strength were drawn for tensile test bars which were sintered at different temperatures and shown that they can be used for quality control. Graphics between ultrasonic velocity and density, hardness were drawn for production parts and shown that they can be used for quality control. Keywords: Powder metallurgy, nondestructive tests, ultrasonic velocity measurement, density, porosity. xu