| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1575097 | Materials Science and Engineering: A | 2014 | 8 Pages |
Abstract
The microstructure and mechanical properties of a Fe-15Mn-1.5Al-0.6C TWIP steel with and without rare earth (RE) addition were investigated. The RE-alloyed steel showed both improved tensile strength and total elongation (TEL). Optical microscopy and electron back-scattered diffraction (EBSD) characterizations showed that the RE-alloyed steel possessed a more homogeneous microstructure and a larger fraction of high-angle grain boundaries, which increased the TEL. Meanwhile, EBSD and transmission electron microscope (TEM) analyses indicated that the RE-alloyed steel exhibited more uniform distributed annealing twins and secondary annealing twins with a thickness of 10-20Â nm appeared in some grains, which resulted in the higher tensile strength.
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Authors
Yangyang Zhao, Junfeng Wang, Shu Zhou, Xiaodong Wang,