Journal
SCRIPTA MATERIALIA
Volume 141, Issue -, Pages 111-114Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2017.06.044
Keywords
Interstitial-free steel; Heterogeneous structure; Mechanical properties; Work hardening
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Funding
- National Natural Science Foundation of China [51541101, 51671039, 51471039]
- State Key Research and Development Program of MOST of China [2016YFB0700401, 2016YFB0700403]
- 111 Project by the Ministry of Education [B16007]
- State Administration of Foreign Experts Affairs of China
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Annealed interstitial-free steel (IF steel) and deformed IF steel sheets were stacked alternatively into multi-layers to produce laminated IF steel through thermal-mechanical processing. After proper processing, a yield strength of 500 MPa, an ultimate tensile strength of 600 MPa (comparable to cold rolled one) and a uniform elongation around 17% can be realized. Microstructural observation by electron back-scatter diffraction revealed a characteristic hierarchical layer + heterogeneous lamella structure, namely L2 structure. The reasons for the good mechanical properties were discussed. (C) 2017 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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