Accumulation of stress in constrained assemblies: novel Satoh test configuration

Shirzadi, A. A. and Bhadeshia, H. K. D. H. (2010). Accumulation of stress in constrained assemblies: novel Satoh test configuration. Science and Technology of Welding & Joining, 15(6) pp. 497–499.




A common test used to study the response of a transforming material to external constraint is due to Satoh and involves the cooling of a rigidly constrained tensile specimen while monitoring the stress that accumulates. Such tests are currently common in the invention of welding alloys which on phase transformation lead to a reduction in residual stresses in the final assembly. The test suffers from the fact that the whole of the tensile specimen is not maintained at a uniform temperature, making it difficult to interpret the data. To eliminate this problem, the authors report here a novel Satoh test in which the material investigated is a part of a composite sample. It is demonstrated that this helps avoid some of the complications of the conventional tests and gives results which are consistent with independent tests.

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