金属学报  2008, Vol. 44 Issue (1): 98-104

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不锈钢0Cr18Ni10Ti焊接头高温、高应变率下的动态力学性能

许泽建;李玉龙;刘明爽;李朋洲;吴云刚

西北工业大学航空学院

RESEARCH ON DYNAMIC MECHANICAL PROPERTIES OF 0Cr18Ni10Ti WELDED JOINT AT ELEVATED TEMPERATURES AND HIGH STRAIN RATES

XU Ze-Jian;;;;

西北工业大学航空学院

许泽建; 李玉龙; 刘明爽; 李朋洲; 吴云刚 . 不锈钢0Cr18Ni10Ti焊接头高温、高应变率下的动态力学性能[J]. 金属学报, 2008, 44(1): 98-104 .
, , , , . RESEARCH ON DYNAMIC MECHANICAL PROPERTIES OF 0Cr18Ni10Ti WELDED JOINT AT ELEVATED TEMPERATURES AND HIGH STRAIN RATES[J]. Acta Metall Sin, 2008, 44(1): 98-104 .

摘要 参考文献 相关文章 Metrics 全文: PDF(519 KB)   摘要: 利用带有加热装置和同步组装系统的Hopkinson压杆系统对反应堆工程管道材料 0Cr18Ni10Ti焊接头的母材和焊缝进行了高温、高应变率 下的动态力学性能测试. 实验的应变率范 围为200—3800 s-1, 温度范围为25—600 ℃, 得到了材料在不同温度和应变率耦合作用下的应力 -应变曲线. 着重考察了两种材料塑性流变应力的 温度和应变率敏感性, 并得到了它们的 Johson-Cook (J-C)模型. 实验表明, 母材和焊缝材料均具有较强的热软化效应及应变强化效应, 而 应变率强化效应相对较弱, 并且这些效应本身也受到温度的影响. 温度较高时, 材料的塑性流变应力受应变和应变率强化的程度 减弱, 在一定变形量下甚至出现降低趋势. 根据热激活位错运 动理论对上述现象的内在机理进行了解释和探讨, 并对试样的金相组织进行了观察和分析. 关键词 ： 0Cr18Ni10Ti不锈钢,  焊接头,  高温     Abstract：Dynamic mechanical behaviors of base and weld materials for an important reactor engineering pipeline material, 0Cr18Ni10Ti, are studied at elevated temperatures and high strain rates with split Hopkinson pressure bar (SHPB), which is installed with heating and synchro assembly system. The tests are carried out at loading rates ranging from 200 to 3800/s and temperatures ranging from 25 to 600ºC, and different stress-strain curves are obtained correspondingly for each condition. Emphasis is put on the study of strain rate and temperature sensitivity of plastic flow stress, and the Johson-Cook (J-C) models are obtained for both the materials. The results show that the base and the weld materials both have evident heat softening effect and strain hardening effect, but the effect of strain rate hardening is comparatively weaker. Meanwhile, these effects are also effected by temperature, and the hardening effects of both the materils by strain and strain rate are weakened at higher temperature. With the increase of strain, the flow stress of both the materials even begin to decrease at a certain deformation. The intrinsic mechanism is discussed according to the thermally activated dislocation motion theory. Optical microstructures of the materials are observed. Bright slipping bands formed under shear stress along the diagonal lines of the longitudinal section of the specimen for the base material, and the material at the center of the specimen deformed most seriously. Distorted dendrite structure is observed on the profile of the weld material after load, while no obvious slipping band is found. Key words： weld    base material    high strain rate    elevated temperature    dynamic mechanical property 收稿日期: 2007-04-16      ZTFLH:  TG407   服务 把本文推荐给朋友 加入引用管理器 E-mail Alert RSS 作者相关文章 许泽建 李玉龙 刘明爽 李朋洲 吴云刚 44.8K 链接本文: https://www.ams.org.cn/CN/      或      https://www.ams.org.cn/CN/Y2008/V44/I1/98 [1]Zhao Y X,Yang B,Li P Z.Nucl Power En9,2004;25(1): 45 (赵永翔，杨冰，李朋州．核动力工程，2004；25(1)：45) [2]Zhang Z.Woodworking Mach,2002;(3):22 (张震．木工机床，2002；(3)：22) [3]Guo W G.Acta Metall Sin,2006;42:463 (郭伟国．金属学报，2006；42：463) [4]Nemat-Nasser S,Guo W G.Mech Mater,2005;37:379 [5]Nemat-Nasser S,Guo W G,Kihl D P.J Mech Phys Solids, 2001;49:1823 [6]Nemat-Nasser S,Li Y L.Acta Mater,1998;46:565 [7]Gilat A,Wu X.Exp Mech,1994;34:166 [8]Lankford J.J Mater Sci,1981;16:1567 [9]Campbell J D,Ferguson W G.Philos Mag,1970;21:63 [10]Rosenfield A R,Hahn G T.Trans ASM,1966;59:962 [11]Seeger A.Philos Mag,1955;46:1194 [12]Lee W-S,Liu C-Y.Mater Sci Eng,2006;A426:101 [13]Su Y Q.Plastic Deformation Theory of Metal.Beijing: Metallurgical Industry Press,1995:145 (苏玉芹．金属塑性变形原理．北京：冶金工业出版社，1995：145) [14]Johnson G R,Cook W H.In:Proc 7th Int Syrup on Bal- listics,The Hague,Netherlands,American Defense Pre- paredness Association,1983:541 [15]Zerilli F J,Armstrong R W.J Appl Phys,1987;61:1816 [16]Steinberg D J,Cochran S G,Guinan M W.University of California Radiation Laboratory,UCRL-80465,Revision 2nd ed.,Lawrence Livermore National Laboratory,Liver- more,CA,1979 [17]Follansbee P S,Kocks U F.Acta Metall,1988;36:81 [18]Ren S Z,Zhang J J,Chen Z R,Shi Y F,Mao Z Q,Gao H W.Metallographic Map of Iron and Steel Shanghai: Shanghai Scientific and Technical Literature Press,2003: 588 (任颂赞，张静江，陈质如，施友方，毛照樵，高汉文．钢铁金相图谱．上海：上海科学技术文献出版社，2003：588) [19]Chen B L.Theory of Welding Metallurgy.Chapter 3, Beijing:Tsinghua University Press,1991 (陈伯蠡．焊接冶金原理．第3章，北京：清华大学出版社，1991) [1] 白佳铭, 刘建涛, 贾建, 张义文. 高W高Ta型粉末高温合金的蠕变性能及溶质原子偏聚[J]. 金属学报, 2023, 59(9): 1230-1242. 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