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多道次熱軋模擬過程中Al-Zn-Mg-Cu-Zr合金的再結(jié)晶特征
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內(nèi)蒙古工業(yè)大學(xué)材料學(xué)院,北京有色金屬研究總院,內(nèi)蒙古工業(yè)大學(xué)材料學(xué)院,江西理工大學(xué)

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Recrystallization characterizations of an Al-Zn-Mg-Cu-Zr alloy during multi-pass hot rolling simulation
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School of Materials Science and Engineering,Inner Mongolia University of Technology,General Research Institute for Non-ferrous,School of Materials Science and Engineering,Inner Mongolia University of Technology,Institute of engineering research,JiangXi University of Science and Technology

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    摘要:

    采用Gleeble-1500D熱模擬實(shí)驗(yàn)機(jī)根據(jù)設(shè)計(jì)的軋制工藝對7055合金進(jìn)行多道次熱壓縮試驗(yàn),模擬其企業(yè)熱軋過程,采用電子背散射衍射和透射電鏡研究了再結(jié)晶特征。在不同變形條件下,表現(xiàn)出不同的再結(jié)晶機(jī)制,主要動態(tài)再結(jié)晶機(jī)制有連續(xù)動態(tài)再結(jié)晶和幾何動態(tài)再結(jié)晶。前者的形核機(jī)制主要為,原始晶界弓出形核和亞晶合并形核；后者歸因于嚴(yán)重的不均勻變形。在道次間的間隙期間,靜態(tài)再結(jié)晶發(fā)生。另外,尺寸大于1 μm的第二相也促進(jìn)再結(jié)晶。

    Abstract:

    In this paper we report recrystallization characterizations, using electron back-scattered diffraction (EBSD) and transmission electron microscope (TEM), of an Al-Zn-Mg-Cu-Zr alloy during multi-pass plain strain compression (PSC) performed to simulate the hot rolling system on Gleeble-l500D thermo-mechanical simulator．The results show that with increase of the deformation, there are mainly two dynamic recrystallization mechanisms responsible for the development of new grain, including continuous dynamic recrystallization (CDRX) and geometry dynamic recrystallization (GDRX). The former is related to original grain boundaries bulging and sub-grain coalescence. The latter can be associated with serious deformation inhomogeneity. Besides, SRX happens during inter-pass time. The particles with a size of more than 1 μm also result in the recrystallization.

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閆亮明,沈健,杜趙新,張建波.多道次熱軋模擬過程中Al-Zn-Mg-Cu-Zr合金的再結(jié)晶特征[J].稀有金屬材料與工程,2017,46(11):3233~3238.[Liang-ming Yan, Jian Shen, Zhaoxin Du, Jianbo Zhang. Recrystallization characterizations of an Al-Zn-Mg-Cu-Zr alloy during multi-pass hot rolling simulation[J]. Rare Metal Materials and Engineering,2017,46(11):3233~3238.]
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  • 收稿日期:2015-11-25
  • 最后修改日期:2016-01-22
  • 錄用日期:2016-02-24
  • 在線發(fā)布日期: 2017-12-13
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