%0 Journal Article %T Extrusion upsetting multiple processing in sandglass die %A Lu, W.L. %A Wang, Y. %A Feng, Z.H. %A Hai, J.T. %J Materials Science and Technology %V 17 %N 8 %P 1018-1020 %@ 0267-0836 %D 2001-08-01 %I SAGE Publications %~ DeepDyve