| A NEW MODEL FOR CAVITY NUCLEATION |
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| 作者姓名： | Liu Zhiyi Mechanical |
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| 作者单位： | Liu Zhiyi Mechanical Department，Petroleum University，Dongying 257062 |
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| 摘 要： | ＡＮＥＷＭＯＤＥＬＦＯＲＣＡＶＩＴＹＮＵＣＬＥＡＴＩＯＮ①ＬｉｕＺｈｉｙｉＭｅｃｈａｎｉｃａｌＤｅｐａｒｔｍｅｎｔ，ＰｅｔｒｏｌｅｕｍＵｎｉｖｅｒｓｉｔｙ，Ｄｏｎｇｙｉｎｇ２５７０６２ＡＢＳＴＲＡＣＴＢｙｃｏｒｅｃｔｅｖａｌｕａｔｉｏｎｏｆｔｈｅａｃ...
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A NEW MODEL FOR CAVITY NUCLEATION |
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| Liu Zhiyi,Mechanical.A NEW MODEL FOR CAVITY NUCLEATION[J].Transactions of Nonferrous Metals Society of China,1997(2). |
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| Authors: | Liu Zhiyi Mechanical |
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| Affiliation: | Liu Zhiyi Mechanical Department,Petroleum University,Dongying 257062 |
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| Abstract: | By correct evaluation of the action of interior stress in superplastic deformation, it was believed that interior stress was the driving force for voids aggregation when deformed at high temperature. Based on this principle, a new critical radius model for cavity nucleation was deduced, which points out that critical radius for cavity nucleation is function of exerted stress and grain diameter. The model can be successfully applied to explain the phenomenon that cavity diameter and fraction decreased with grains refining at initial stage in superplastic deformation of Al Li alloys whose grains refined by dynamic recrystallization. |
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| Keywords: | cavity nucleation superplastic deformation dynamic recrystallization |
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