【摘要】 在Ｔ＝１１０～１９５℃及ε＝０．４×１０（－３）～２．４７×１０（－３）Ｓ（－１）时对Ｚｎ－１．８％Ａｌ合金超塑性ｍ－δ曲线进行了测定，属ｍＬ＝ｍｍｉｎ型。可分为基本形式、上升式及下降式三种形式。应用ＣＬ（刘勤）方程式对Ｃ值进行了计算，获得了全部有关特征参数，包括（δ０＝０），δＬ，δＦ；ｍ０（≠０），ｍＬ，ｍＦ；（Ｃ０＝ｋ０／ｋ０＝１），ＣＬ（＝ｋＬ／ｋ０）及ＣＦ（＝ｋＦ／ｋ０）的全部或一部分，由曲线的形式决定。测到的总延伸率δＦ＝１９０／～４１０％．各自由每根ｍ－δ曲线的其余特征参数的动静态或直间接效应的综合结果所决定。进一步否定了当前超塑性领域内存在的错误观点。并对有关微观变化进行了初步研究。更多还原

【Abstract】 The superplastic m-δ curves of Zn-1.8%Al alloy have been determined with T=110-195℃ and ε=0. 4×10(-3)～2.17×10(-3)s(-1).All are of the mL=mmin type and can be divided into the fundamental,the ascending and the descending types.To them,the CL equation has been applied. A part or whole of the parameters of(δ0= 0),δL,δF;m0(≠0),mL,mF;(C0=k0 /k0=1),CL (=kL/k0) and CF (=kF/k0) charcteristic of the m-δ curves have been obtained. depending upon the types of curves determined.The superplastic total elongations,δF=190 %￣410 % have been obtaines.They should be determined by the resultant effects of the dynamic and static factors of all other parameters characteristic of their m-δ curves.The incorroect point of view in the field of superplastic studies is further refuted.The related microscopic changes have been preliminarily studied.更多还原