| ZK60及ZK60 (0.9Y)镁合金高温变形行为的热模拟研究 |
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| 引用本文： | 王 斌,易丹青,方西亚,刘会群,吴春萍.ZK60及ZK60 (0.9Y)镁合金高温变形行为的热模拟研究[J].稀有金属材料与工程,2010,39(1):106-111. |
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| 作者姓名： | 王 斌 易丹青 方西亚 刘会群 吴春萍 |
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| 作者单位： | 中南大学,湖南,长沙,410083 |
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| 基金项目： | 湖南省科技攻关项目(04GK1008-2) |
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| 摘 要： | 采用Gleeble-1500热模拟试验机进行压缩试验,研究ZK60和ZK60(0.9Y)镁合金在变形温度为473～723K、应变速率为0.001～1s-1范围内的变形行为,计算了应力指数和变形激活能,并采用Zener-Hollomon参数法构建了合金高温塑性变形的本构关系。结果表明:在试验变形条件范围内,合金的真应力-真应变曲线为动态再结晶型;在573～723K范围内,应力指数随着变形温度的升高而增加,变形激活能随着变形温度和应变速率的改变而变化。对比ZK60合金,ZK60(0.9Y)合金的变形激活能降低了30%,且材料常数n和A值均降低。
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| 关 键 词： | 塑性变形 热模拟 动态再结晶 镁合金 |
| 收稿时间： | 1/5/2009 12:00:00 AM |
Thermal Simulation on Hot Deformation Behavior of ZK60 and ZK60 (0.9Y) Magnesium Alloys |
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| Wang Bin,Yi Danqing,Fang Xiy,Liu Huiqun and Wu Chunping.Thermal Simulation on Hot Deformation Behavior of ZK60 and ZK60 (0.9Y) Magnesium Alloys[J].Rare Metal Materials and Engineering,2010,39(1):106-111. |
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| Authors: | Wang Bin Yi Danqing Fang Xiy Liu Huiqun and Wu Chunping |
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| Affiliation: | Central South University;Changsha 410083;China |
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| Abstract: | The hot deformation behavior of ZK60 and ZK60(0.9Y) magnesium alloys was investigated by hot compressive tests on Gleeble-1500 thermal simulation test machine in temperature range from 473 to 723 K and strain rate from 0.001 to 1s-1.The stress exponent and the deformation activation energy were calculated.The constitutive equation of the plastic deformation of ZK60 alloy was obtained by introducing Zener-Hollomon parameter.The results show that the true stress-strain curves of the alloys have dynamic recrys... |
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| Keywords: | plastic deformation thermal simulation dynamic recrystallization magnesium alloy |
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