将快速凝固Mg92.5Zn6.4Y1.1合金薄带在330℃往复挤压2道次和4道次,然后再正挤压制成φ10mm的棒材.用OM、TEM、XRD及DTA研究了往复挤压对材料微观结构的影响.研究表明,往复挤压有利于合金薄带的焊合,获得高致密度的棒材.往复挤压2道次,棒材相组成为α-Mg和Mg3 YZn6准晶(Ⅰ);4道次相组成为α-Mg和原始的Ⅰ相以及析出的Ⅰ相和MgZn.往复挤压道次增加,Ⅰ相得到细化,并有纳米相脱溶析出.
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