%0 Journal Article
%T Superplastic Flow Behavior of Zr Base Bulk Metallic Glass in Supercooled Liquid Region<br>Zr基块体非晶合金在过冷液相区的超塑性流变行为
%A SHEN Jun
%A WANG Gang
%A SUN Jianfei
%A CHEN Demin
%A XING Dawei
%A ZHOU Bide
%A <br>沈军
%A 王刚
%A 孙剑飞
%A 陈德民
%A 邢大伟
%A 周彼德
%J 金属学报
%D 2004
%I 
%X Isothermal tensile tests of Zr_(41.25) Ti_(13.75) Ni_(10)Cu_(12.5)Be_(22.5) bulk metallic glass in supercooled liquid region are carried out at four characteristic temperatures of 616, 636, 656 and 676 K which are in the vicinity of the end temperature of glass transition. Experimental results indicate that the superplastic flow behaviors of the material, viz., the flow stress and the elongation depend strongly on the testing temperature and tensile rate. The elongation increases firstly and then decreases with increasing rate and the maximum elongation reaches 1625% at 656 K and 5 mm/min. The strain rate sensitivity exponents determined by using Backofen method are 0.25, 0.65 and 0.93 at 636, 656 and 676 K, respectively. The free volume model is used to interpret the observed superplastic flow behavior.
%K Zr-based bulk metallic glass
%K supercooled liquid region
%K superplasticity
%K free volume model<br>锆基块体非晶合金
%K 过冷液相区
%K 超塑性
%K 自由体积模型
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=AB188D3B70B071C57EB64E395D864ECE&jid=B061E1135F1CBDEE96CD96C109FEAD65&aid=2F559ABA72EA1AE7&yid=D0E58B75BFD8E51C&vid=1371F55DA51B6E64&iid=94C357A881DFC066&sid=AE43DE0664B02889&eid=91BAD12CFABB3251&journal_id=0412-1961&journal_name=金属学报&referenced_num=12&reference_num=40