The effect of prestrain and bake hardening on the low-cycle fatigue properties of TRIP steel

Robertson, L.T, Hilditch, T.B and Hodgson, P.D 2008, The effect of prestrain and bake hardening on the low-cycle fatigue properties of TRIP steel, International journal of fatigue, vol. 30, no. 4, pp. 587-594, doi: 10.1016/j.ijfatigue.2007.06.002.

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Title The effect of prestrain and bake hardening on the low-cycle fatigue properties of TRIP steel
Author(s) Robertson, L.T
Hilditch, T.BORCID iD for Hilditch, T.B orcid.org/0000-0003-0300-5774
Hodgson, P.D
Journal name International journal of fatigue
Volume number 30
Issue number 4
Start page 587
End page 594
Total pages 8
Publisher Elsevier Ltd
Place of publication Oxford, England
Publication date 2008-04
ISSN 0142-1123
1879-3452
Keyword(s) Low-cycle fatigue
TRIP
Prestrain
Cyclic softening
Strain-life
Summary The scope of this study was to examine the effects of plane strain prestrain, induced via cold-rolling, and subsequent automotive paint bake hardening cycle on both tensile and fatigue properties of a hot rolled TRIP780 multiphase steel. Strain-life data has been generated for as-received (0% prestrain), 10% and 20% prestrained samples, in both baked and unbaked conditions. Cold rolling  increased the number of strain reversals to failure at high cyclic strain amplitudes with no effect at low strain amplitudes. Bake hardening increased the number of reversals to failure at high cyclic strain amplitudes. The prestrained material exhibited partial cyclic softening, with some residual strength increase. The residual strength increase was attributed to the austenite to martensite transformation that occurred during the prestraining process.
Language eng
DOI 10.1016/j.ijfatigue.2007.06.002
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
Copyright notice ©2007, Elsevier
Persistent URL http://hdl.handle.net/10536/DRO/DU:30017707

Document type: Journal Article
Collections: Centre for Material and Fibre Innovation
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