| TC21合金超塑性本构关系的BP人工神经网络模型 |
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| 引用本文： | 赵文娟,丁桦,周舸,曹富荣,侯红亮.TC21合金超塑性本构关系的BP人工神经网络模型[J].锻压技术,2009,34(4). |
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| 作者姓名： | 赵文娟 丁桦 周舸 曹富荣 侯红亮 |
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| 作者单位： | 1. 东北大学,材料与冶金学院,辽宁,沈阳,110004
2. 北京航空制造工程研究所,北京,100024 |
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| 摘 要： | TC21合金是一种高强、高韧、高损伤容限型两相钛合金,具有极佳超塑成形性能。建立合理的超塑性本构关系,对了解该合金的超塑性变形特征以及超塑性成形工艺优化有着重要的指导作用。本文对TC21合金在Gleeble1500热模拟试验机上进行了超塑性等温压缩变形试验。结果表明,随着温度的升高或应变速率的降低,材料的流变应力显著降低,动态再结晶是其主要的软化机制。根据所获得的实验数据,应用BP人工神经网络建立了TC21合金的超塑性本构关系模型,较好地反映了TC21合金的超塑变形过程中流动应力的变化规律。
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| 关 键 词： | TC21合金 超塑性 本构关系 BP神经网络 |
Constitutive relationship model of TC21 alloy during superplastic deformation based on BP artificial neural network |
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| ZHAO Wen-juan,DING Hua,ZHOU Ge,CAO Fu-rong,HOU Hong-liang.Constitutive relationship model of TC21 alloy during superplastic deformation based on BP artificial neural network[J].Forging & Stamping Technology,2009,34(4). |
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| Authors: | ZHAO Wen-juan DING Hua ZHOU Ge CAO Fu-rong HOU Hong-liang |
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| Affiliation: | 1.School of Materials and Metallurgy;Northeastern University;Shenyang 110004;China;2.Beijing Aeronautical Manufacturing Technology Research Institute;Beijing 100024;China |
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| Abstract: | TC21 alloy is a two-phase alloy with high strength,high toughness and high damage-tolerant,and expresses excellent superplasticity.So it is necessary to build an appropriate constitutive relationship for profound study on dynamic response between flow-stress and thermal parameters during superplastic deformation,which has important guiding effect on optimization of superplastic processing parameters.In this study,superplastic compression tests were carried out for TC21 alloy by Gleeble1500 stress-strain sim... |
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| Keywords: | TC21 alloy superplasticity constitutive relationship BP artificial neural network |
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