Low temperature superplasticity and thermal stability of a nanostructured low-carbon microalloyed steel

被引：0
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作者：
J. Hu
L.-X. Du
G.-S. Sun
H. Xie
R.D.K. Misra
机构：
[1] The State Key Laboratory of Rolling and Automation,Department of Metallurgical
[2] Northeastern University,undefined
[3] Laboratory for Excellence in Advanced Steel Research,undefined
[4] Metallurgical and Materials Engineering Program,undefined
[5] Materials and Biomedical Engineering University of Texas at El Paso,undefined
来源：
Scientific Reports | / 5卷
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摘要：
We describe here for the first time the low temperature superplasticity of nanostructured low carbon steel (microalloyed with V, N, Mn, Al, Si and Ni). Low carbon nanograined/ultrafine-grained (NG/UFG) bulk steel was processed using a combination of cold-rolling and annealing of martensite. The complex microstructure of NG/UFG ferrite and 50–80 nm cementite exhibited high thermal stability at 500 °C with low temperature elongation exceeding 100% (at less than 0.5 of the absolute melting point) as compared to the conventional fine-grained (FG) counterpart. The low temperature superplasticity is adequate to form complex components. Moreover, the low strength during hot processing is favorable for decreasing the spring back and minimize die loss.
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