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SiC顆粒增強(qiáng)Al基復(fù)合材料的動(dòng)態(tài)再結(jié)晶模型
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Dynamic Recrystallization Model of SiC Particle Reinforced Aluminum Matrix Composites
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    摘要:

    采用Gleeble-1500熱模擬試驗(yàn)機(jī)研究15%SiC顆粒增強(qiáng)鋁基復(fù)合材料在溫度為713~773 K、應(yīng)變速率為0.001~1 s-1的熱變形行為，并建立熱變形本構(gòu)方程；同時(shí)采用Quantiment-500型自動(dòng)圖形分析儀測量該材料的動(dòng)態(tài)再結(jié)晶晶粒尺寸。在研究中，以試驗(yàn)數(shù)據(jù)為基礎(chǔ)，建立q–s和?q/?s–s曲線，從而進(jìn)一步獲得動(dòng)態(tài)再結(jié)晶的臨界應(yīng)變和穩(wěn)態(tài)應(yīng)變，并通過試驗(yàn)數(shù)據(jù)的回歸分析，建立動(dòng)態(tài)再結(jié)晶的臨界應(yīng)變模型和穩(wěn)態(tài)應(yīng)變模型，并在此基礎(chǔ)上，獲得所研究材料的動(dòng)態(tài)再結(jié)晶圖。

    Abstract:

    The hot deformation and dynamic recrystallization (DRX) behavior of 15%SiC particle reinforced aluminum matrix composites were studied through isothermal compression test at the temperature of 713-773 K and the strain rate of 0.001-1 s-1; the hot deformation constitutive equation was established. Meanwhile, DRX grain size of the composites was measured by a Quantiment-500 automatic image analyzer. In the study, q–s and ?q/?s–s curves were plotted based on the experimental data to further obtain the critical strain and steady strain of DRX. Then the critical strain model and the steady strain model of DRX were set up by regression analysis of experimental data. Based on the results, the diagram of DRX for SiC particle reinforced aluminum matrix composites was given.

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張 鵬,李付國. SiC顆粒增強(qiáng)Al基復(fù)合材料的動(dòng)態(tài)再結(jié)晶模型[J].稀有金屬材料與工程,2010,39(7):1166~1170.[Zhang Peng, Li Fuguo. Dynamic Recrystallization Model of SiC Particle Reinforced Aluminum Matrix Composites[J]. Rare Metal Materials and Engineering,2010,39(7):1166~1170.]
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  • 收稿日期:2009-08-28
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