应变速率对镁合金压缩变形性能的影响
The Influence of Strain Rates on Compressive Deformation Process of Magnesium
摘 要
采用圆柱形试样等温(573 K)压缩试验方法对不同应变速率下AM60B镁合金压缩变形行为进行了研究,采用数理统计方法建立了573 K时AM60B镁合金不同应变速率下塑性变形的本构模型.结果表明：AM60B镁合金的流变应力随着应变速率的升高而增大,塑性变形率随着应变速率的升高而降低;建立的本构模型能充分反映不同应变速率对其塑性变形过程的影响规律.
压缩变形
应变速率
本构模型
magnesium alloy
compressive deformation
strain rate
constitutive equation
Abstract
The deformation behaviors of AM60B magnesium alloy at different strain rates were investigated by way of compressing columniform cast ingots at 573 K.It was found that the flow stress raises along with the strain rate increasing as well as the compression ratio decreases.The compressive deformation constitutive equation of AM60B Mg alloy at different strain rates was established by means of mathematical statistics.And the experiments indicate that the constitutive equation can describe the compressive deformation rules of AM60B Mg alloy at different strain rates precisely.
中图分类号 TG146
所属栏目
基金项目
收稿日期 2005/10/17
修改稿日期 2005/12/15
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备注曹韩学(1977-),男,广西凌云人,讲师,博士.
引用该论文: CAO Han-xue,LONG Si-yuan,LIAO Hui-min. The Influence of Strain Rates on Compressive Deformation Process of Magnesium[J]. Materials for mechancial engineering, 2006, 30(11): 4～6
曹韩学,龙思远,廖慧敏. 应变速率对镁合金压缩变形性能的影响[J]. 机械工程材料, 2006, 30(11): 4～6
被引情况:
【1】廖慧敏,龙思远,蔡军, "高应变率对AM60镁合金力学性能的影响",机械工程材料 33, 83-85(2009)
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参考文献
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【3】Minghetti T,Steinhoff K,Nastran M,et al.Advanced forming techniques for magnesium alloys[J].Metallurgia Italiana,2002,94:19-23.
【4】ZHANG Xianhong,RUAN Xueyu,Osakada K.Forge ability of AZ31B magnesium alloy in warm forging[J].Transactions of Nonferrous Metals Society of China (English Edition),2003,13:632-635.
【5】余琨,黎文献,王日初,等.变形镁合金的研究、开发及应用[J].中国有色金属学报,2003,13(2):277-288.
【6】Hatsukano,Kanichi,Matsuzakik,et al.Deformation behavior and forging of magnesium wrought alloy[J].Materials Science Forum,2003,426-432:557-562.
【7】Ogawa N,Shiomi M,Osakada K.Forming limit of magnesium alloy at elevated temperatures for precision forging[J].International Journal of Machine Tools & Manufacture,2002,42:607-614.
【8】赵新海,赵国群,王广春.金属体积成形预成形设计的现状及发展[J].塑性工程学报,2000,7(3):1-6.
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【11】Barnett M R.Influence of deformation conditions and texture on the high temperature flow stress of magnesium AZ31[J].Journal of Light Metals,2001,(1):167-177.
【12】Takuda H,Fujimoto H,Hatta N.Modelling on flow stress of Mg-Al-Zn alloys at elevated temperatures[J].Journal of Materials Processing Technology,1998,80-81:513-516.
【13】William Altenhof,Anna Raczy,Melissa Laframboise,et al.Numerical simulation of AM50A magnesium alloy under large deformation[J].International Journal of Impact Engineering,2004,30:117-142.
【14】薛富波,张文彤,田晓燕.SAS8.2统计应用教程[M].北京:兵器工业出版社,2004.
【15】Koichi Ishikawa,Hiroyuki Watanabe,Toshiji Mukai.High strain rate deformation behavior of an AZ91 magnesium alloy at elevated temperatures[J].Materials Letters,2005,59:1511-1515.
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