期刊
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
卷 496, 期 1-2, 页码 383-388出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.msea.2008.06.017
关键词
IF steel; Cold rolling; Reduction; Tensile; Strength; Ductility
类别
资金
- National Natural Science Foundation of China [50725102]
- Key Project of the National Ministry of Education of China [47202010]
- Program for Changjiang Scholars and Innovative Research Team in University [IRT0731]
An interstitial-free (IF) steel sheet with a cold-rolling reduction of 75% shows a high tensile strength (710 MPa) while preserving a considerable plastic strain (13%). Both flow stress and tensile stress monotonically increased with an increasing rolling reduction. Interestingly, the uniform plastic strain also increased from 3.6 to 9.2% with increasing the cold-rolling reduction from 13 to 75%. However, a fall in ductility in the specimens with rolling reductions between 13 and 47% was found, which is attributed to the onset of localized shearing resulting in a decrease of elongation-to-failure. The ductility recovery with increasing the rolling reduction up to 75% is related with the decreasing both in lamellar spacings and cellblocks sizes. (C) 2008 Elsevier B.V. All rights reserved.
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