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Experimental in-situ verification of the unloading mechanics of dual phase steels

journal contribution
posted on 2019-07-08, 00:00 authored by Andreas Kupke, L Madej, Peter HodgsonPeter Hodgson, Matthias WeissMatthias Weiss
© 2019 Elsevier B.V. The paper presents the first experimental verification of dislocation repulsion during springback of Dual Phase (DP) steel, a mechanism which is suggested to cause non-linear unloading due to micro-plastic strain generation. In-situ loading-unloading tests are conducted within a Scanning Electron Microscope (SEM). It is shown that strain partitioning between ferrite grains as well as within a single ferrite grain occurs. It was observed that dislocations pile up during loading and repel or bow out during unloading. Only dislocations that were mobile during the initial deformation were able to move during unloading.

History

Journal

Materials science and engineering: a

Volume

760

Pagination

134 - 140

Publisher

Elsevier

Location

Amsterdam, The Netherlands

ISSN

0921-5093

Language

eng

Publication classification

C1 Refereed article in a scholarly journal

Copyright notice

2019, Elsevier B.V.