%0 Journal Article
%T SUPERPLASTICITY IN SiCw/ZK60 COMPOSITE<br>SUPERPLASTICITY IN SiCw／ZK60 COMPOSITE
%A FYan
%A KWu
%A MZhao
%A <br>F.Yan
%A K.Wu
%A M.Zhao
%J 金属学报(英文版)
%D 2003
%I 
%X The superplastic deformation behavior of SiCw/ZK60 composite was investigated at temperatures ranging from 573K to 723K and at initial strain rates ranging from 8.3x10-4s-1 to 8.3x10-2s-1. A maximum elongation of 200% with a m-value of 0.35 was obtained at 613K and a initial strain rate of 1.67x 10-2s-1. The apparent activation energy (98kJ/mol) approximates that for grain boundary diffusion (92kJ/mol) in magnesium. It is proposed that the dominant mechanism of superplastic deformation in the present composite is grain boundary sliding accommodated by diffusional transport, besides, interfacial sliding plays an important role in the superplastic deformation.
%K magnesium matrix composite
%K superplasticity
%K apparent activation energy<br>
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=AB188D3B70B071C57EB64E395D864ECE&jid=C19B08D052F5FD8445F4BB80A1A5D7BF&aid=46D83DC23B7230DD963EBBC83DED4D7B&yid=D43C4A19B2EE3C0A&vid=7801E6FC5AE9020C&iid=38B194292C032A66&sid=F9F74EC1AA08A7B9&eid=1D67BE204FBF4800&journal_id=1006-7191&journal_name=金属学报(英文版)&referenced_num=1&reference_num=15