Characterization of Metallic Materials Through Elastic Properties

The paper presents various studies carried out in the authors' laboratory for multi-scale microstructural characterization in different metallic structural materials such as nickel base alloys, zirconium alloys and titanium alloys through elastic properties. The elastic properties are evaluated at macroscale using ultrasonic velocity measurements and at micro/nano scale using atomic force acoustic microscopy. A thickness independent ultrasonic measurement based nondestructive methodology implemented for in-situ assessment of degradation of alloy 625 ammonia cracker tubes in heavy water plants is also discussed.