TY - JOUR
T1 - Grain size effect on high-speed deformation of Hadfield steel
AU - Ueji, Rintaro
AU - Kondo, Daisuke
AU - Takagi, Yoshinori
AU - Mizuguchi, Takashi
AU - Tanaka, Yasuhiro
AU - Shinagawa, Kazunari
N1 - Funding Information:
Acknowledgments This study is based on study supported by Grant-in-Aid for Scientific Research on Innovative Area ‘‘Bulk Nanostructured Metals’’ (ID: 22102002), Grant-in-Aid for Scientific Research (ID: 23560839) through the Japan Society for the Promotion of Science (JSPS), and Grant for Industrial Technology Research (project ID 07A26002a) of the New Energy and Industrial Technology Development Organization (NEDO). The authors acknowledge support from Mr. T. Yoshisako, Mr. S. Utsunomiya, and Mr. T. Lee with the experiments.
Copyright:
Copyright 2012 Elsevier B.V., All rights reserved.
PY - 2012/11
Y1 - 2012/11
N2 - The influence of the microstructure on the tensile properties and fracture behavior of Hadfield steel at high strain rate were studied. Hadfield steel samples with different mean grain sizes and carbon phases were prepared by rolling at medium temperatures and subsequent annealing. A sample with an average grain size larger than 10 lm, and a small number of carbides shows ductility with local elongation (post uniform elongation) at a highspeed tensile deformation rate of 103 s-1. In addition, the fracture surface changes from brittle to ductile with increasing strain rate. In contrast, a fine-grained sample with carbides undergoes brittle fracture at any strain rate. The grain size dependence is discussed by considering the dynamic strain aging as well as the emission of dislocation from cracks. The accelerated diffusion of carbon due to grain refinement is considered as one of the important reason for brittle fracture in the fine-grained Hadfield steel.
AB - The influence of the microstructure on the tensile properties and fracture behavior of Hadfield steel at high strain rate were studied. Hadfield steel samples with different mean grain sizes and carbon phases were prepared by rolling at medium temperatures and subsequent annealing. A sample with an average grain size larger than 10 lm, and a small number of carbides shows ductility with local elongation (post uniform elongation) at a highspeed tensile deformation rate of 103 s-1. In addition, the fracture surface changes from brittle to ductile with increasing strain rate. In contrast, a fine-grained sample with carbides undergoes brittle fracture at any strain rate. The grain size dependence is discussed by considering the dynamic strain aging as well as the emission of dislocation from cracks. The accelerated diffusion of carbon due to grain refinement is considered as one of the important reason for brittle fracture in the fine-grained Hadfield steel.
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U2 - 10.1007/s10853-012-6604-y
DO - 10.1007/s10853-012-6604-y
M3 - Article
AN - SCOPUS:84868201493
SN - 0022-2461
VL - 47
SP - 7946
EP - 7953
JO - Journal of Materials Science
JF - Journal of Materials Science
IS - 22
ER -