Residual stress measurements using neutron diffraction

Woo, Wanchuck; Kim, Dong-Kyu; An, Gyu-Baek

doi:2015.33.1.30

J Weld Join > Volume 33(1); 2015 > Article

Special Issue

Journal of Welding and Joining 2015;33(1):30-34.
DOI: https://doi.org/10.5781/JWJ.2015.33.1.30 Published online February 28, 2015.

Residual stress measurements using neutron diffraction

Wanchuck Woo^*, Dong-Kyu Kim^*, Gyu-Baek An^**

Correspondence: Wanchuck Woo,
Email: chuckwoo@kaeri.re.kr

Abstract

Residual stresses are inherently introduced into the engineering components during manufacturing includingrolling, forging, bending and welding processes. Excessive residual stresses are known to be detrimental to the proper integrity and performance of components. Neutron diffraction has become a well-established technique for the determination of residual stresses in welds. The deep penetration capability of neutrons into most metallic materials makes neutron diffraction a powerful tool for the residual stress measurements through the thickness of the weld specimen. Furthermore, the unique volume-averaged bulk characteristic of the scattering beam and mapping capability in three dimensions is suitable for the engineering purpose. In this presentation, the neutron diffraction measurements of the residual stresses will be introduced and measurement results will highlighted in thick weld plates.

Key Words: Residual stress, Neutron diffraction, Welds