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Transactions of Materials and Heat Treatment. 2011, (09) Core

Effect of severe deformation under different temperatures and annealing on microstructure of commercial pure aluminumChinese Full Text

XIONG Yi1,2,HE Tian-tian1,GUO Zhi-qiang1,CHEN Zheng-ge3,ZHANG Ling-feng1,2,REN Feng-zhang1,2(1.School of Materials Science and Engineering,Henan University of Science and Technology, Luoyang 471003,China;2.Henan Key Laboratory of Advanced Non-Ferrous Metals, Luoyang 471003,China;3.No.63883 Unit of PLA,Luoyang 471000,China)

Abstract: Ultra-fine grained commercial purity aluminum was produced by severe cold rolling and annealing.Microstructural characteristics and microhardness of ultra-fine grained commercial purity aluminum were investigated by means of transmission electron microscopy（TEM） and Vickers hardness test under cold rolling and cryo-rolling,respectively,and annealing.Fine grain strengthening effect of the cryo-rolled and annealed commercial purity aluminum with 0.5 μm ultra-fine grains is superior to that of the room temperature rolled and annealed with 1 μm ultra-fine grains.Rolling at liquid nitrogen temperature results in higher hardness than at room temperature under the same condition.When annealed below 200 ℃,hardness changes slightly,while annealed above 200 ℃,ultra-fine grained commercial purity aluminum structure actually is recrystallized rather than recovered and its hardness decreases rapidly,and then tends to be stable value.
Keywords：

cryo-rolling; ultra-fine grained commercial pure aluminum; microstructure; microhardness;

  • DOI：

    10.13289/j.issn.1009-6264.2011.09.009

  • Series：

  • Subject：

  • Classification Code：

    TG156.2

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