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Cyclic deformation of advanced high-strength steels : mechanical behavior and microstructural analysis

Hilditch, Timothy B., Timokhina, Ilana B., Robertson, Leigh T., Pereloma, Elena V. and Hodgson, Peter D. 2009, Cyclic deformation of advanced high-strength steels : mechanical behavior and microstructural analysis, Metallurgical and materials transactions A : physical metallurgy and materials science, vol. 40, no. 2, pp. 342-353.

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Title Cyclic deformation of advanced high-strength steels : mechanical behavior and microstructural analysis
Author(s) Hilditch, Timothy B.
Timokhina, Ilana B.
Robertson, Leigh T.
Pereloma, Elena V.
Hodgson, Peter D.
Journal name Metallurgical and materials transactions A : physical metallurgy and materials science
Volume number 40
Issue number 2
Start page 342
End page 353
Total pages 12
Publisher Springer New York LLC
Place of publication New York, N.Y.
Publication date 2009-02
ISSN 1073-5623
1543-1940
Summary The fatigue properties of multiphase steels are an important consideration in the automotive industry. The different microstructural phases present in these steels can influence the strain life and cyclic stabilized strength of the material due to the way in which these phases accommodate the applied cyclic strain. Fully reversed strain-controlled low-cycle fatigue tests have been used to determine the mechanical fatigue performance of a dual-phase (DP) 590 and transformation-induced plasticity (TRIP) 780 steel, with transmission electron microscopy (TEM) used to examine the deformed microstructures. It is shown that the higher strain life and cyclic stabilized strength of the TRIP steel can be attributed to an increased yield strength. Despite the presence of significant levels of retained austenite in the TRIP steel, both steels exhibited similar cyclic softening behavior at a range of strain amplitudes due to comparable ferrite volume fractions and yielding characteristics. Both steels formed low-energy dislocation structures in the ferrite during cyclic straining.
Language eng
Field of Research 091207 Metals and Alloy Materials
Socio Economic Objective 970109 Expanding Knowledge in Engineering
HERDC Research category C1 Refereed article in a scholarly journal
ERA Research output type C Journal article
HERDC collection year 2009
Copyright notice ©2008, The Minerals, Metals & Materials Society and ASM International
Persistent URL http://hdl.handle.net/10536/DRO/DU:30022583

Document type: Journal Article
Collection: Centre for Material and Fibre Innovation
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Citation counts: TR Web of Science Citation Count  Cited 13 times in TR Web of Science
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