Multi-phase microstructure design of a novel high strength TRIP steel through experimental methodology Wang,C, Ding,H, Cai,M and Rolfe,B 2014, Multi-phase microstructure design of a novel high strength TRIP steel through experimental methodology, Materials science and engineering a, vol. 610, pp. 436-444, doi: 10.1016/j.msea.2014.05.063. Attached Files Name Description MIMEType Size Downloads Title Multi-phase microstructure design of a novel high strength TRIP steel through experimental methodology Author(s) Wang,C Ding,H Cai,M Rolfe,B orcid.org/0000-0001-8516-6170 Journal name Materials science and engineering a Volume number 610 Start page 436 End page 444 Publisher Elsevier BV Place of publication Amsterdam, Netherlands Publication date 2014-07-29 ISSN 0921-5093 Keyword(s) Alloying element Intercritical annealing Isothermal bainitic transformation Retained austenite TRIP effect Science & Technology Technology Nanoscience & Nanotechnology Materials Science, Multidisciplinary Metallurgy & Metallurgical Engineering Science & Technology - Other Topics Materials Science INDUCED PLASTICITY STEELS AIDED SHEET STEELS MECHANICAL-PROPERTIES PHASE-TRANSFORMATION SI NB AL DEFORMATION STABILITY Summary The multi-phase structure of a novel low-alloy transformation induced plasticity (TRIP) steel was designed through experimental analysis. The evolutions of both microstructure and mechanical properties during the two-stage heat treatment were analyzed. The phase transformations during the intercritical annealing and the isothermal bainitic transformation were investigated by means of dilatometry. It was shown that two types of C diffusion were detected during intercritical annealing and a complex microstructure was formed after heat treatment. The processing parameters were selected in such a way to obtain microstructures with systematically different volume fractions of ferrite, bainite and retained austenite. The volume fractions of ferrite and retained austenite were found to be two main factors controlling the ductility. Furthermore, a high volume fraction of C-rich retained austenite, which was stabilized at room temperature, was the origin of a TRIP effect. The resulting material demonstrates a significant improvement in the ultimate tensile strength (1077. MPa) with good uniform elongation (22.5%), as compared to conventional TRIP steels. © 2014 Elsevier B.V. Language eng DOI 10.1016/j.msea.2014.05.063 Field of Research 091207 Metals and Alloy Materials Socio Economic Objective 861103 Basic Iron and Steel Products HERDC Research category C1 Refereed article in a scholarly journal ERA Research output type C Journal article Copyright notice ©2014, Elsevier BV Persistent URL http://hdl.handle.net/10536/DRO/DU:30071529 Document type: Journal Article Collections: Faculty of Science, Engineering and Built Environment School of Engineering Institute for Frontier Materials GTP Research Related Links Link Description Connect to published version Go to link with your DU access privileges   Connect to Elements publication management system Go to link with your DU access privileges     Unless expressly stated otherwise, the copyright for items in DRO is owned by the author, with all rights reserved. Versions Version Filter Type Wed, 18 Mar 2015, 14:42:33 EST Thu, 19 Mar 2015, 04:28:32 EST Fri, 27 Mar 2015, 17:32:56 EST Sat, 28 Mar 2015, 05:09:53 EST Tue, 31 Mar 2015, 14:39:14 EST Wed, 01 Apr 2015, 14:37:43 EST Filtered Full Citation counts:   Cited 19 times in TR Web of Science Cited 25 times in Scopus Search Google Scholar Access Statistics: 590 Abstract Views, 3 File Downloads  -  Detailed Statistics Created: Fri, 27 Mar 2015, 17:32:56 EST