TY - JOUR
T1 - Chemical boundary engineering
T2 - A new route toward lean, ultrastrong yet ductile steels
AU - Ding, Ran
AU - Liu, Geng
AU - Wan, Xinhao
AU - Ponge, Dirk
AU - Raabe, Dierk
AU - Godfrey, Andy
AU - Furuhara, Tadashi
AU - Yang, Zhigang
AU - van der Zwaag, Sybrand
AU - More Authors, null
PY - 2020
Y1 - 2020
N2 - For decades, grain boundary engineering has proven to be one of the most effective approaches for tailoring the mechanical properties of metallic materials, although there are limits to the fineness and types of microstructures achievable, due to the rapid increase in grain size once being exposed to thermal loads (low thermal stability of crystallographic boundaries). Here, we deploy a unique chemical boundary engineering (CBE) approach, augmenting the variety in available alloy design strategies, which enables us to create a material with an ultrafine hierarchically heterogeneous microstructure even after heating to high temperatures. When applied to plain steels with carbon content of only up to 0.2 weight %, this approach yields ultimate strength levels beyond 2.0 GPa in combination with good ductility (>20%). Although demonstrated here for plain carbon steels, the CBE design approach is, in principle, applicable also to other alloys.
AB - For decades, grain boundary engineering has proven to be one of the most effective approaches for tailoring the mechanical properties of metallic materials, although there are limits to the fineness and types of microstructures achievable, due to the rapid increase in grain size once being exposed to thermal loads (low thermal stability of crystallographic boundaries). Here, we deploy a unique chemical boundary engineering (CBE) approach, augmenting the variety in available alloy design strategies, which enables us to create a material with an ultrafine hierarchically heterogeneous microstructure even after heating to high temperatures. When applied to plain steels with carbon content of only up to 0.2 weight %, this approach yields ultimate strength levels beyond 2.0 GPa in combination with good ductility (>20%). Although demonstrated here for plain carbon steels, the CBE design approach is, in principle, applicable also to other alloys.
UR - http://www.scopus.com/inward/record.url?scp=85082755444&partnerID=8YFLogxK
U2 - 10.1126/sciadv.aay1430
DO - 10.1126/sciadv.aay1430
M3 - Article
AN - SCOPUS:85082755444
SN - 2375-2548
VL - 6
JO - Science Advances
JF - Science Advances
IS - 13
M1 - eaay1430
ER -