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Non-destructive evaluation of the micro residual stresses of IIIrd order by using micro magnetic methods

: Rabung, Madalina; Altpeter, Iris; Boller, Christian; Dobmann, Gerd; Herrmann, Hans-Georg

Postprint urn:nbn:de:0011-n-2833176 (56 KByte PDF)
MD5 Fingerprint: 707f9a90b0eb4306672485e52f6b274d
Created on: 3.9.2014

NDT & E International 63 (2014), No.1, pp.7-10
ISSN: 0963-8695
Journal Article, Electronic Publication
Fraunhofer IZFP ()
micro residual stresses; Barkhausen noise

Nanoscale coherent precipitates and the corresponding micro residual stresses play a dominant role in the strengthening process of materials. At present, there exists no experimental method for measuring micro residual stresses of IIIrd kind non-destructively. In the frame of the present work, it will be shown that micro-magnetic measurement techniques based on the tensile loading dependent maximum Barkhausen noise amplitude can be used for the analysis of micro residual stresses (MRS) of IIIrd kind (coherency residual stresses).For this purpose,Fe-Cu-alloys with well-defined contents of Cu-precipitates were produced and investigated.