Measurement of Residual Stresses in the Cold-Rolled Fe-Ni-Mn/Invar Thermo-Bimetallic Plate

Abstract:

The paper presents a method for measuring residual stresses in normal thermo-bimetal Fe-Ni-Mn/Invar strips with a thickness of 0.76 mm. For this purpose, a setup was designed which permits to remove layers from a strip substrate by electrochemical etching. Residual stresses in the directions that are longitudinal and transversal to rolling are determined by the curvature method based on the layer growing/removing techniques. As a reference, residual stresses were also determined by hole-drilling technique. Tensile and compressive residual stresses arose both in active and in passive layers and were considerably higher when determined by the hole-drilling technique.

• Periodical: Materials Science Forum (Volumes 768-769)
• Pages: 101-106
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.768-769.101
• Online since: September 2013
• Authors: Harri Lille, Jakub Kõo, Jaak Valgur, Alexander Ryabchikov, Renno Reitsnik, Renno Veinthal
• Keywords: Curvature Method, Incremental Hole Drilling Technique, Layer Removing, Residual Stress, Thermo-Bimetal

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