2219铝合金高温塑性变形应变补偿的本构模型

详细信息    查看全文 | 推荐本文 |

英文篇名：Strain-compensated Constitutive Model for High Temperature Plastic Deformation of 2219 Aluminum Alloy 作者：王凯 ; 吴运新 ; 龚海 ; 刘磊 英文作者：WANG Kai;WU Yunxin;GONG Hai;LIU Lei;Light Alloy Research Institute, Central South University;College of Mechanical and Electrical Engineering, Central South University; 关键词：2219铝合金 ; 塑性变形 ; 流动应力 ; 本构模型 ; 应变补偿 英文关键词：2219 Al alloy;;plastic deformation;;flow stress;;constitutive model;;strain compensation 中文刊名：SJGY 英文刊名：Hot Working Technology 机构：中南大学轻合金研究院;中南大学机电工程学院; 出版日期：2019-05-14 15:24 出版单位：热加工工艺 年：2019 期：v.48;No.511 基金：国家自然科学基金项目(51405520,U1637601) 语种：中文; 页：SJGY201909036 页数：5 CN：09 ISSN：61-1133/TG 分类号：128-132

摘要

利用Gleeble-3500热压缩试验机,在不同的应变速率(0.01～01 s~(-1))和温度(350～500℃)获得了2219铝合金的真应力-真应变曲线,研究了2219铝合金的高温流动特性。然后,考虑到应变的影响,建立了应变补偿的双曲正弦本构模型。结果表明:2219铝合金流动应力随着变形温度降低和应变速率升高而增加。建立的应变补偿的双曲正弦模型能够很好地预测2219铝合金在高温变形过程中的流动行为。
        The true stress-true strain curves of 2219 aluminum alloy were obtained at different strain rates(0.01-01 s~(-1))and temperatures(350-500℃) by using Gleeble-3500 hot compression tester. The high temperature flow characteristics of 2219 aluminum alloy were studied. Then, considering the influence of strain, a strain compensated hyperbolic sine constitutive model was established. The results show that the flow stress of 2219 aluminum alloy increases with the decrease of deformation temperature and the increase of strain rate. The strain compensated hyperbolic sinusoidal model can well predict the flow behavior of 2219 aluminum alloy during high temperature deformation.

引文

[1]王祝堂,田荣璋.铝合金及其加工手册[M].长沙:中南工业大学出版社,2005:153-168.
    [2]Kaibyshev R,Sitdikov O,Mazurina I,et al.Deformation behavior of a 2219 Al alloy[J].Materials Science and Engineering A,2002,334(1):104-113.
    [3]Ji H S,Ji H K,Wagoner R H.A plastic constitutive equation incorporating strain,strain-rate,and temperature[J].International Journal of Plasticity,2010,26(12):1746-1771.
    [4]Sellars C M,Tegart W J M.Hot workability[J].International Materials Reviews,1972,17(1):1-24.
    [5]欧玲,孙斌,王智.2219铝合金热压缩变形流动应力[J].热加工工艺,2008,37(2):42-45.