RT Journal Article
SR Electronic
T1 Ultrastrong low-carbon nanosteel produced by heterostructure and interstitial mediated warm rolling
JF Science Advances
JO Sci Adv
FD American Association for the Advancement of Science
SP eaba8169
DO 10.1126/sciadv.aba8169
VO 6
IS 39
A1 Gao, Bo
A1 Lai, Qingquan
A1 Cao, Yang
A1 Hu, Rong
A1 Xiao, Lirong
A1 Pan, Zhiyi
A1 Liang, Ningning
A1 Li, Yusheng
A1 Sha, Gang
A1 Liu, Manping
A1 Zhou, Hao
A1 Wu, Xiaolei
A1 Zhu, Yuntian
YR 2020
UL http://advances.sciencemag.org/content/6/39/eaba8169.abstract
AB Ultrastrong materials can notably help with improving the energy efficiency of transportation vehicles by reducing their weight. Grain refinement by severe plastic deformation is, so far, the most effective approach to produce bulk strong nanostructured metals, but its scaling up for industrial production has been a challenge. Here, we report an ultrastrong (2.15 GPa) low-carbon nanosteel processed by heterostructure and interstitial mediated warm rolling. The nanosteel consists of thin (~17.8 nm) lamellae, which was enabled by two unreported mechanisms: (i) improving deformation compatibility of dual-phase heterostructure by adjusting warm rolling temperature and (ii) segregating carbon atoms to lamellar boundaries to stabilize the nanolamellae. Defying our intuition, warm rolling produced finer lamellae than cold rolling, which demonstrates the potential and importance of tuning deformation compatibility of interstitial containing heterostructure for nanocrystallization. This previously unreported approach is applicable to most low-carbon, low-alloy steels for producing ultrahigh strength materials in industrial scale.