Sin² Ψ Stress Measurement Method with Maintaining Probing Depth

Article type: Research Article

Authors: Yanase, Etsuya | Zolotarev, Konstantin Vladimirovich | Nishio, Kozi | Kusumi, Yukihiro | Arai, Kazuo | Nakagawa, Shigetomo

Affiliations: New Industry Research Organization, Kobe, Japan | Akashi Technical Institute, Kawasaki Heavy Industries, Ltd, Japan

Note: [] Corresponding author.

Abstract: A new method was proposed to estimate the distribution of residual stress in a sample surface. When a sample surface has stress gradient, we cannot easily understand the stress distribution due to nonlinearity of Sin2 Ψ diagram. This non-linearity is because probing depth varies with Ψ angle. We discussed a new method to estimate Sin2 Ψ diagram with maintaining the X-ray incident angle. By using this method, we can obtain Sin2 Ψ diagram without changing the probing depth and measure the stress up to the depth in a sample. We report the results of stress measurement in ground stainless steel sample by using our method. The validity of our method is discussed.

Keywords: Stress measurement, Residual stress gradient, Sin2 Ψ method, Probing depth, Stainless steel, Synchrotron radiation

DOI: 10.1080/10238160108200152

Journal: Journal of Neutron Research, vol. 9, no. 2-4, pp. 273-279, 2001