TY - JOUR
T1 - The main factor influencing the tensile properties of surface nano-crystallized graded materials
AU - Li, Jianjun
AU - Chen, Shaohua
AU - Wu, Xiaolei
AU - Soh, Aikah
AU - Lu, Jian
PY - 2010/10
Y1 - 2010/10
N2 - The improved mechanical properties of surface nano-crystallized graded materials produced by surface severe plastic deformation (S2PD) are generally owing to the effects of the refined structure, work-hardened region and compressive residual stress. However, during the S2PD process, residual stress is produced simultaneously with work-hardened region, the individual contribution of these two factors to the improved mechanical properties remains unclear. Numerical simulations are carried out in order to answer this question. It is found that work hardening predominates in improving the yield strength and the ultimate tensile strength of the surface nano-crystallized graded materials, while the influence of the residual stress mainly emerges at the initial stage of deformation and decreases the apparent elastic modulus of the surface nano-crystallized graded materials, which agrees well with the experimental results. © 2010 Elsevier B.V.
AB - The improved mechanical properties of surface nano-crystallized graded materials produced by surface severe plastic deformation (S2PD) are generally owing to the effects of the refined structure, work-hardened region and compressive residual stress. However, during the S2PD process, residual stress is produced simultaneously with work-hardened region, the individual contribution of these two factors to the improved mechanical properties remains unclear. Numerical simulations are carried out in order to answer this question. It is found that work hardening predominates in improving the yield strength and the ultimate tensile strength of the surface nano-crystallized graded materials, while the influence of the residual stress mainly emerges at the initial stage of deformation and decreases the apparent elastic modulus of the surface nano-crystallized graded materials, which agrees well with the experimental results. © 2010 Elsevier B.V.
KW - Finite element method
KW - Residual stress
KW - Surface nano-crystallized graded material
KW - Work hardening
UR - http://www.scopus.com/inward/record.url?scp=77956440182&partnerID=8YFLogxK
UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-77956440182&origin=recordpage
U2 - 10.1016/j.msea.2010.07.064
DO - 10.1016/j.msea.2010.07.064
M3 - RGC 21 - Publication in refereed journal
SN - 0921-5093
VL - 527
SP - 7040
EP - 7044
JO - Materials Science and Engineering A
JF - Materials Science and Engineering A
IS - 26
ER -