TY - JOUR
T1 - Development of ultrahigh strength and high ductility in nanostructured iron alloys with lattice softening and nanotwins
AU - Edalati, Kaveh
AU - Toh, Shoichi
AU - Furuta, Tadahiko
AU - Kuramoto, Shigeru
AU - Watanabe, Masashi
AU - Horita, Zenji
N1 - Funding Information:
K.E. thanks the Japan Society for Promotion of Science (JSPS) for a postdoctoral scholarship. M.W. acknowledges financial support from National Science Foundation through grant DMR-0804528 . This work was supported in part by a Grant-in-Aid for Scientific Research from the MEXT, Japan , in Innovative Areas “Bulk Nanostructured Metals” and in part by Kyushu University Interdisciplinary Programs in Education and Projects in Research Development .
PY - 2012/9
Y1 - 2012/9
N2 - Bulk nanostructured materials exhibit high strength but very low ductility. In this study, ductile nanostructured iron-base alloys are successfully developed using a combination of three strategies: appropriate choice of chemical compositions for lattice softening, severe plastic deformation using high-pressure torsion for grain refinement, and annealing for nanotwin formation. Accordingly, exceptional performance of both ultrahigh strength, 2.3-3 GPa, and high elongation to failure, 10-20%, which has never been reported for metallic materials, is achieved.
AB - Bulk nanostructured materials exhibit high strength but very low ductility. In this study, ductile nanostructured iron-base alloys are successfully developed using a combination of three strategies: appropriate choice of chemical compositions for lattice softening, severe plastic deformation using high-pressure torsion for grain refinement, and annealing for nanotwin formation. Accordingly, exceptional performance of both ultrahigh strength, 2.3-3 GPa, and high elongation to failure, 10-20%, which has never been reported for metallic materials, is achieved.
UR - http://www.scopus.com/inward/record.url?scp=84864287071&partnerID=8YFLogxK
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U2 - 10.1016/j.scriptamat.2012.06.019
DO - 10.1016/j.scriptamat.2012.06.019
M3 - Article
AN - SCOPUS:84864287071
SN - 1359-6462
VL - 67
SP - 511
EP - 514
JO - Scripta Materialia
JF - Scripta Materialia
IS - 5
ER -