2020 №11 (03) DOI of Article
2020 №11 (05)

The Paton Welding Journal 2020 #11
TPWJ, 2020, #11, 18-24 pages

Inside welds: advanced characterization of residual stresses by neutron diffraction

M. Rogante
Rogante Engineering Office Contrada San Michele n. 61, 62012 Civitanova Marche, Italy. E-mail: main@roganteengineering.it

Welding processes involve often very high temperature gradients, which can induce elevated residual stresses (RS). It is essential, therefore, to know these RS, especially by determining them experimentally e.g. before and after thermal treatments. Neutron beam techniques contribute in general to the solution of important questions and problems related to the methodological restrictions of the analysis systems normally used: complementary to these investigation methods, they provide concrete and fundamental help to optimize the finished industrial product and increase its performance. Neutron diffraction, in particular, is a powerful tool to assess in a non destructive and non invasive way the RS status in materials and components of technological interest. In this paper, the basic theoretical aspects and some examples are reported, regarding the possible determination of RS by using neutron diffraction in different kinds of welded structures. 39 Ref., 7 Figures.
Keywords: residual stress, neutron diffraction, welded joints, advanced characterization

Received 05.11.2020


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