孟刚,李伯龙,黄晖,李红梅,聂祚仁

• 1:北京工业大学材料科学工程学院

摘要(Abstract)：

在Gleeble 1500D热模拟仪上进行热压缩实验,研究Al-4.7Mg-0.7Mn-0.1Zr-0.4Er合金高温变形行为,变形温度为300~500℃,变形速率为0.001~10 s-1,变形后总应变量为0.7。变形温度高于400℃时,真应力-真应变曲线呈现稳态流变,在其他温度下变形真应力-真应变曲线表现为加工硬化。根据动态材料模型建立合金的加工图,在400~500℃和0.001~0.1 s-1变形时加工图上出现一个发生动态回复的峰区,相应的变形激活能为176 kJ/mol,大于纯铝的自扩散激活能,表明合金在该区域变形的机制是位错的交滑移。变形失稳区的组织特征是局部变形。

关键词(KeyWords)： 高温变形;加工图;动力学分析;稀土元素铒

Abstract:

Keywords:

基金项目(Foundation): 国家高技术发展计划资助项目(2006AA03A207);; 国家重点基础研究发展规划资助项目(2005CB623706)

作者(Author): 孟刚,李伯龙,黄晖,李红梅,聂祚仁

DOI: 10.13289/j.issn.1009-6264.2010.02.005

参考文献(References)：

• [1]Yang J J,Nie Z R,Jin TN.Effect of trace rare earth element Er on high pure Al[J].Trans Nonferrous Met Soc China,2003,13(5):1036-1039.
• [2]Nie Z R,Jin TN,Zou J X.Development on research of advanced rare earth aluminium alloy[J].Trans Nonferrous Met Soc China,2003,13(3):509-514.
• [3]Prasad Y V R K,Rao K P.Processing maps and rate controlling mechanisms of hot deformation of electrolytic tough pitch copper in the temperaturerange 300-950℃[J].Marerals Science and Engingeering A,2005,391(1-2):141-150.
• [4]Prasad Y V R K,Sastry D H.Hot working behavior of extruded powder products of B2iron aluminide alloys[J].Marerals Science and EngingeeringA,2000,311(1-2):42-53.
• [5]Wang Y C.Hot deformaton and processing maps of Al18B4O33/ZK60composite[J].Marerals Science and Engingeering A,2008,487(1-2):179-184.
• [6]Narayana Murty S V S.On the development of instability criteria during hot working with reference to IN718[J].Marerals Science and EngingeeringA,1998,254(1-2):76-82.
• [7]Prasad YVR K.Author’s reply:dynamic materials model:basis and principles[J].Marerals Science and Engingeering A,1982,4(3):174-175.
• [8]Prasad Y V R K,Seshacharyulu T.Influence of oxygen content on the forging response of equiaxed(α+β)preform of Ti-6Al-4V:commercial vs.ELI grade[J].Journal of Materials Processing Technology,2001,108(3):320-327.
• [9]鲁世强,李鑫,王克鲁.基于动态材料模型的材料热加工工艺优化方法[J].中国有色金属学报,2007,17(6):891-895.LUShi-qiang,LI Xin,WANG Ke-lu.Optimizing approach of materials hot working processes based on dynamic material model[J].The ChineseJournal of Nonferrous Metals,2007,17(6):891-895.
• [10]张伟红,张士宏.NiTi合金热压缩实验数据的修正及其本构方程[J].金属学报,2006,42(10):1036-1040.ZHANG Wei-hong,ZHANG Shi-hong.Correction of hot compression test and constitutive equation of NiTi alloy[J].Acta Metallurgica Sinica,2006,42(10):1036-1040.
• [11]Prasad Y V R K.Processing maps for hot deformation of rolled AZ31 magnesium alloy plate:anisotropy of hot workability[J].Marerals Science andEngingeering A,2008,487(1-2):316-327.
• [12]Narayana Murty S V S.On the flow localization concepts in the processing maps of IN718[J].Marerals Science and Engingeering A,1999,267(1-2):159-161.
• [13]Prasad Y V R K.Processing maps for hot working of titanium alloys[J].Marerals Science and Engingeering A,1998,243(1-2):82-88.
• [14]Garofalo F.Fundamentals of Creep and Creep Rupture in Metals[M].New York:Macmillan,1965.
• [15]McQueen HJ,Jonas J J.Treatise on Materials Science and Technology[M].New York:Plastic Deformation of Materials Academic Press,1975.
• [16]沈健.2091铝锂合金高温塑性变形行为研究[D].长沙:中南工业大学,1996:35-37.
• [17]余胜文,王为,杨军军.Al-5Mg-Er合金中Al3Er相的析出及其热力学计算分析[J].中国稀土学报,2006,24(4):471-474.YU Sheng-wen,WANG Wei,YANG Jun-jun.Thermodynamic calculation and precipitation behavior of Al3Er phase in Al-5Mg-Er alloy[J].Journalof the Chinese Rare Earth Society,2006,24(4):471-474.

文章评论(Comment)：