Edinburgh Research Explorer
Mechanical properties of lean duplex stainless steel at post-fire
condition
Citation for published version:
Huang, Y & Young, B 2018, 'Mechanical properties of lean duplex stainless steel at post-fire condition',
Thin-Walled Structures, vol. 130, pp. 564-576. https://doi.org/10.1016/j.tws.2018.06.018
Digital Object Identifier (DOI):
10.1016/j.tws.2018.06.018
Link:
Link to publication record in Edinburgh Research Explorer
Document Version:
Peer reviewed version
Published In:
Thin-Walled Structures
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Download date: 10. Aug. 2022
Manuscript Details
Manuscript number TWST_2017_587_R1
Title Mechanical properties of lean duplex stainless steel at post-fire condition
Article type Research Paper
Abstract
This paper reports an experimental investigation of the mechanical properties of cold-formed lean duplex stainless
steel after exposure to high temperatures up to 1000°C. The test specimens were extracted from rectangular and
square hollow sections that were cold-rolled from flat plates of lean duplex stainless steel. The mechanical properties,
Young’s modulus, yield strength, ultimate strength, Ramberg-osgood parameter and strain at ultimate strength of lean
duplex stainless steel, are reported. The residual mechanical properties of steel materials are compared with the
predicted values calculated by the existing equations. It is shown that the existing equations cannot provide accurate
predictions for the post-fire mechanical properties of lean duplex stainless steel materials. Thus, a unified equation is
proposed to predict residual mechanical properties for lean duplex stainless steel specimens in post-fire conditions. A
constitutive model is also proposed to predict the stress-strain relationship of the test specimens after exposure to high
temperatures up to 1000°C. A reliability analysis was conducted for the proposed equation. The proposed equation
compared favourably with the experimental results, and was found to be reliable for predicting lean duplex stainless
steel mechanical properties after exposure to high temperatures.
Keywords Lean duplex; stainless steel; mechanical properties; post-fire; stress-strain
curve.
Manuscript region of origin Europe
Corresponding Author Yuner Huang
Order of Authors Yuner Huang, Ben Young
Suggested reviewers Shan-Shan Huang, OU ZHAO, Sheida Afshan
Submission Files Included in this PDF
File Name [File Type]
cover letter-lean duplex post-fire_revision.docx [Cover Letter]
Written explanation and changes (post-fire lean duplex in TWS)-BY.docx [Response to Reviewers]
Post-
fire paper lean duplex_Revised Manuscript with changes marked.docx [Revised Manuscript with Changes Marked]
Highlights - lean duplex post-fire.docx [Highlights]
Post-fire paper lean duplex_revise for reviewer%27s comments-BY.docx [Manuscript File]
To view all the submission files, including those not included in the PDF, click on the manuscript title on your EVISE
Homepage, then click 'Download zip file'.
SCHOOL of ENGINEERING
Dr Yuner Huang
INSTITUTE for INFRASTRUCTURE and
ENVIRONMENT
The University of Edinburgh
William Rankine Building
Thomas Bayes Road
Edinburgh EH9 3FG
Scotland, UK
Tel: +44 (0)131 650 5736
Email: yuner.huang@ed.ac.uk
25 October 2017
Dear Professor Silvestre,
I wish to submit a revised paper entitled “Mechanical Properties of Lean Duplex Stainless
Steel at Post-fire Condition” to be considered for publication in Thin-Walled Structures. All
the reviewers’ comments have been considered and addressed.
This paper presents a comprehensive experimental and theoretical study on lean duplex
stainless steel material after exposed to high temperatures. The test specimens were extracted
from cold-formed lean duplex stainless steel rectangular hollow sections (RHS). Lean duplex
stainless steel is a relatively new material to be used as structural elements in construction
industry. But it has gained increasing attention, as it has a high strength-to-cost ratio compared
with other stainless steel material and better fire resistant properties compared with carbon
steel. The investigation on their post-fire mechanical properties provides evidence in repair and
reinforcement of stainless steel structures after fire hazards, and thus reduce economic losses
of fire and improve sustainability of the built environment. We believe that this manuscript is
appropriate for publication by Thin-Walled Structures, because it investigates mechanical
properties of cold-formed thin-walled hollow sections after exposed to high temperatures. I
believe it will be of great interest of the readers of Thin-Walled Structures.
Written explanation and changes (TWST_2017_587)
Journal: Thin-Walled Structures
Title of Paper: Mechanical properties of lean duplex stainless steel at post-fire condition
Authors: Yuner Huang and Ben Young
Ms. Ref. No.: TWST_2017_587
The authors appreciate the reviewers’ useful comments. The reviewers’ comments have been
considered seriously and addressed accordingly below:
Reviewer #1
This paper describes an experimental study on the residual mechanical properties of lean
duplex stainless steels following exposure to fire conditions. It includes the details of test
specimens, test procedures and test results, followed by comparisons with available
predictive equations for the residual mechanical properties. Finally it proposes new predictive
equations. As stated by the authors post-fire mechanical properties are not available for lean
duplex stainless steels, and thus this experimental study and its results are quite useful. This
reviewer recommends acceptance of this paper for publication in TWS. However, it needs
major revision before it can be accepted.
Authors’ reply: Thank you very much for the recommendation for publication in Thin-
Walled Structures. Major revisions have been made according to the reviewer’s comments.
1. This paper has so many English mistakes throughout the paper. Authors must revise the
paper by correcting all the English mistakes. Examples of mistakes are: hollow sections that
cold-formed, equation compare well, eminent need, there is no available research, are remain
unknown, steel at post-fire condition, after exposed to fire, increased in a constant rate, were
took out, mainly base steel, past tense versus present tense, plural versus singular. These
mistakes should not have been in the paper submitted to a Q1 journal
