7Gholinia A, Humphreys F J, Prangneu P B. Processing to ultrafine grain structures by conventional routes [J].Mater Sci Tech,2000,16 : 1251.
8Grimes R, Dashwood G J, Hamson A W, et al. Development of a high strain rate superplasticity [J]. Mater Sci Tech, 2000(16) : 1334.
9Hayes J S, Keyte R, Prangnell P B. Effect of grain size on tensile behaviour of submicron grained Al-3wt%Mg alloy produced by severe deformation[J].Mater Sci Tech,2000,16:1259.
10Berbon P B, Furukawa M, Horita Z,et al. Application of ECAC for producing superplastic Aluminum alloy [J].Miner Metal Mate Soc/AIME, 1998,2 : 173.
