刘勇,赵瑞龙,田保红,张晓伟,张毅

• 1:河南科技大学材料科学与工程学院
• 2:河南省有色金属材料科学与加工技术重点实验室

摘要(Abstract)：

利用Gleeble-1500热力模拟试验机,在温度为650～950℃、应变速率为0.01～5 s-1、总应变量0.7的条件下,对W-50%Cu复合材料高温塑性变形过程中的动态再结晶行为及其热加工图进行了研究和分析。试验结果表明:W-50%Cu复合材料高温流动应力-应变曲线主要以动态回复和动态再结晶软化机制为特征,峰值应力随变形温度的降低或应变速率的升高而增加;在真应力-应变曲线基础上,建立的W-50%Cu复合材料高温变形本构模型较好地表征了其高温流变特性;同时,利用W-50%Cu复合材料DMM加工图分析了其变形机制和失稳机制,可确定其热加工工艺优先选择变形温度650～700℃、应变速率1～5 s-1或变形温度850～950℃、应变速率0.01～0.1 s-1。

关键词(KeyWords)： W-50%Cu复合材料;高温变形;本构模型;动态再结晶;DMM加工图

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(50571035);; 河南科技大学博士科研启动基金项目(09001199)

作者(Author): 刘勇,赵瑞龙,田保红,张晓伟,张毅

DOI: 10.13289/j.issn.1009-6264.2011.09.005

参考文献(References)：

• [1]Kim Y D,Oh N L,Oh S T,et al.Thermal conductivity of W-Cu composites at various temperatures[J].Materials Letters,2001,51(5):420-424.
• [2]周武平,吕大铭.钨铜材料应用和生产的发展现状[J].粉末冶金材料科学与工程,2005,10(1):21-25.ZHOU Wu-ping,LDa-ming.Development of application and production in W-Cu materials[J].Materials Science and Engineering of PowderMetallurgy,2005,10(1):21-25.
• [3]杨明川,宋贞祯,卢柯.W-20%Cu纳米复合粉的制备[J].金属学报,2004,40(6):639-642.YANG Ming-chuan,SONG Zhen-zhen,LU Ke.Synthesis of W-20%Cu nanocomposite powders[J].Acta Metallurgica Sinica,2004,40(6):639-642.
• [4]黄树海,赵祖德,夏志新,等.AZ80合金高温变形行为及加工图[J].稀有金属材料与工程,2010,39(5):848-852.HUANG Shu-hai,ZHAO Zu-de,XIA Zhi-xin,et al.Study on high-temperature deformation behavior and processing Map of AZ80 Alloy[J].RareMetal Materials and Engineering,2010,39(5):848-852.
• [5]范永革,汪凌云.AZ31镁合金的中温流变失稳特征[J].中国有色金属学报,2005,15(10):1062-1066.FAN Yong-ge,WANG Ling-yun.Instability flow characteristics of AZ31 magnesium alloy at moderate temperature[J].The Chinese Journal ofNonferrous Metals,2005,15(10):1062-1066.
• [6]Sellars C M,Mctegart W J.On the mechanism of hot deformation[J].Acta Metall,1966,14:1136-1138.
• [7]Zener C,Hollomon J H.Effect of strain-rate upon the plastic flow of steel[J].J Appl Phys,1944,15(1):22-27.
• [8]Rao K P,Doraivelu S M,Roshan H M,et al.Deformation processing of an aluminum alloy containing particles:Studies on Al-5 Pct Si alloy 4043[J].Metallurgical and Materials Transactions A,1983,14(8):1671-1679.
• [9]Prasad Y V R K,Gegel H L,Doraivelu S M,et al.Modeling of dynamic material behavior in hot deformation:Forging of Ti-6242[J].Metallurgicaland Materials Transactions A,1984,15(10):1883-1892.
• [10]Prasad Y V R K,Sasidhara S.Hot Working Guide:A Compendium of Processing Maps[M].Materials Park,OH:ASM International,1997.
• [11]鞠泉,李殿国,刘国权.15Cr-25Ni-Fe基合金高温塑性变形行为的加工图[J].金属学报,2006,42(2):218-224.JU Quan,LI Dian-guo,LIU Guo-quan.The processing map of hot plastic deformation of a 15Cr-25Ni-Fe base superalloy[J].Acta MetallurgicaSinca,2006,42(2):218-224.
• [12]厉勇,王春旭,刘宪民,等.Fe-14Co-10Ni合金的高温塑性变形及热加工图[J].材料热处理学报,2009,30(6):84-88.LI Yong,WANG Chun-xu,LIU Xian-min,et al.Hot plastic deformation and processing maps of 14Co-10Ni-Fe alloy[J].Transactions of Materialsand Heat Treatment,2009,30(6):84-88.
• [13]孟刚,李伯龙,黄晖,等.Al-4.7Mg-0.7Mn-0.1Zr-0.4Er合金高温变形行为[J].材料热处理学报,2010,31(2):95-99.MENG Gang,LI Bo-long,HUANG Hui,et al.Hot deformation behavior ofAl-4.7Mg-0.7Mn-0.1Zr-0.4Er alloy[J].Transactions of Materials andHeat Treatment,2010,31(2):95-99.
• [14]Ziegler H.Progress in Solid Mechanics[M].New York:Wiley Press,1963.
• [15]曾卫东,周义刚,周军,等.加工图理论研究进展[J].稀有金属材料与工程,2006,35(5):673-677.ZENG Wei-dong,ZHOU Yi-gang,ZHOU Jun,et al.Recent development of processing map theory[J].Rare Metal Materials and Engineering,2006,35(5):673-677.
• [16]王艳,王明家,蔡大勇,等.高强度奥氏体不锈钢的热变形行为及其热加工图[J].材料热处理学报,2005,26(4):65-69.WANG Yan,WANG Ming-jia,CAI Da-yong,et al.Hot deformation behavior and its processing map of a new austenitic stainless steel[J].Transactions of Materials and Heat Treatment,2005,26(4):65-69.

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