TY - JOUR
T1 - Intrinsically ductile failure in a nanocrystalline beta titanium alloy
AU - Xu, Wei
AU - Figueiredo, Roberto B.
AU - Wu, Xiaolin
AU - Pauly, Simon
AU - Stoica, Mihai
AU - Eckert, Jürgen
AU - Langdon, Terence G.
AU - Xia, Kenong
PY - 2011/12
Y1 - 2011/12
N2 - A nanocrystalline bcc Ti 67.4Nb 24.6Zr 5Sn 3 alloy is shown to fracture in an intrinsically ductile manner with exceptionally large dimples (up to 10 μm) which are two orders of magnitude greater than the grain size (≈40nm). This large plasticity length scale is attributed to a combination of low shear modulus (≈ 27GPa), high Poisson's ratio (≈ 0.4) and ultrahigh strength (UTS ≈ 1.1GPa), close to the ideal shear stress, which facilitates ideal shear deformation to promote transgranular shear.
AB - A nanocrystalline bcc Ti 67.4Nb 24.6Zr 5Sn 3 alloy is shown to fracture in an intrinsically ductile manner with exceptionally large dimples (up to 10 μm) which are two orders of magnitude greater than the grain size (≈40nm). This large plasticity length scale is attributed to a combination of low shear modulus (≈ 27GPa), high Poisson's ratio (≈ 0.4) and ultrahigh strength (UTS ≈ 1.1GPa), close to the ideal shear stress, which facilitates ideal shear deformation to promote transgranular shear.
UR - http://www.scopus.com/inward/record.url?scp=83455176325&partnerID=8YFLogxK
U2 - 10.1002/adem.201100116
DO - 10.1002/adem.201100116
M3 - Article
AN - SCOPUS:83455176325
SN - 1438-1656
VL - 13
SP - 1108
EP - 1113
JO - Advanced Engineering Materials
JF - Advanced Engineering Materials
IS - 12
ER -