【摘要】：采用光學顯微鏡、掃描電鏡、浸泡質量損失和拉伸測試等手段研究了軋制方式(常規(guī)軋制和一道次高應變速率軋制)對鎂合金(純鎂,Mg-4Zn,Mg-4Zn-0.3Ca和ZK60)在Hank’s溶液中腐蝕行為的影響.結果表明:與常規(guī)軋制態(tài)相比,高應變速率軋制態(tài)鎂合金在長時間浸泡過程中平均腐蝕速率較低,抗拉強度下降幅度較小,耐腐蝕性能明顯提高,可歸因于晶粒細化、再結晶程度較高、孿晶較少和殘余第二相相對粗大等;軋制態(tài)合金中第二相較少且較細小,表現(xiàn)為相對均勻的絲狀腐蝕.
[Abstract]:By means of optical microscope, scanning electron microscope, immersion mass loss and tensile test, the effects of rolling mode (conventional rolling and one pass of high strain rate rolling) on magnesium alloys (pure magnesium, Mg-4Zn,) were studied. The effect of Mg-4Zn-0.3Ca and ZK60 on corrosion behavior in Hank's solution. The results show that the average corrosion rate, tensile strength decrease and corrosion resistance of high strain rate rolled magnesium alloy are lower, and the corrosion resistance is improved obviously, which can be attributed to grain refinement, compared with the conventional rolling process, the average corrosion rate of high strain rate rolled magnesium alloy during long time immersion is lower than that of conventional rolling process. The recrystallization degree is higher, the twinning is less and the residual second phase is relatively coarse and so on. In the rolled alloy, the second phase is smaller and smaller, showing relatively uniform filamentary corrosion.
【作者單位】： 湖南大學材料科學與工程學院;湖南省噴射沉積技術及應用重點實驗室;
【基金】：國家自然科學基金資助項目(51571089) 湖南大學青年教師成長計劃資助項目(531107021095) 國家級SIT創(chuàng)新實驗項目(201410532001)~~
【分類號】：TG339;TG146.22

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