X-ray stress constants of tungsten alloys

• Published in: International journal of refractory metals & hard materials 1995, Vol.13 (4), p.211-216
• Main Authors: Nan, J-M, He, J-W
• Format: Article
• Language: English
• ISSN: 0263-4368; 2213-3917
• DOI: 10.1016/0263-4368(95)94026-U

This paper studies the X-ray stress constants of tungsten (W) alloys determined experimentally with the X-ray diffraction method. Specimens were designed in the shape of an equi-stress cantilever beam and were machined from materials with different W contents. Their surfaces were ground with abrasive papers to simulate the processing states of real products. The stress constants for different surface states were measured using Co Kα and Fe Kα radiations on (222) and (310) diffracting planes. The effects of W contents and surface states on the stress constant are discussed. It was found that the stress constants did not change much with W content, but decreased significantly with increase of surface plastic deformation. For the purpose of estimating the stress constant, the half width values of the diffraction profiles are used as a measure of the degree of surface deformation. The relations of stress constant with half width value are built up in terms of the experimental results, thus it is possible to determine the residual stresses for different processing states in real production.