金属学报  2005, Vol. 41 Issue (11): 1233-1236

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U720LI合金高温析出γ'相的失稳分解

宋西平; 李红宇; 盖靖峰; 陈国良

北京科技大学新金属材料国家重点实验室

the decomposition of metastable high temperature γ' precipitates in U720LI alloy

SONG Xiping; LI Hongyu; GAI Jingfeng; CHEN Guoliang

State Key Laboratory for Advanced Metals and Materials;University of Science and Technology Beijing

宋西平; 李红宇; 盖靖峰; 陈国良 . U720LI合金高温析出γ'相的失稳分解[J]. 金属学报, 2005, 41(11): 1233-1236 .
, , , . the decomposition of metastable high temperature γ' precipitates in U720LI alloy[J]. Acta Metall Sin, 2005, 41(11): 1233-1236 .

摘要 参考文献 相关文章 Metrics 全文: PDF(1953 KB)   摘要: 对U720LI镍基高温合金连续冷却过程中析出的高温γ' 相的分解现象进行了观察研究. 结果表明,自固溶温度快冷至室温时, 发现有大量细小的γ'$相析出,其尺寸大多位于40-60 nm之间, 均匀分布. 当试样自固 溶温度缓冷至650℃然后快冷至室温时, 发现有两类大小的γ'相析出, 一类在200 nm左右, 为高温析出γ'相; 另一类集中分布在50-65 nm之间,为低温析出γ'相. 重点研究了高温析出γ'相的分解现象, 在高温析出$\gamma'$/$\gamma$相界, 适合非经典的形核和长大的条件, 在高温γ'/γ相界面上的Al和Ti等元素的偏聚区, 可以作为过饱和γ基体析出γ'相的析出核心, γ'相中的Al和Ti的自由能梯度导致高温析出γ'相中Al和Ti等γ'形成元素向细小γ'相核心作短距离扩散,使细小γ'相长大和高温粗大γ'相分解. 此种析出的γ'相的尺寸只有10-20 nm.上述缓冷试样经时效后, 发现高温粗大γ'相的分解现象更加明显. 关键词 ： 镍基高温合金,  γ'相,  分解     Abstract：The decomposition of spherical γ' phase precipitated at high temperature during continuous cooling of U720LI Ni-based alloy has been studied. Fast cooling from supersaturated γ solid solution of the alloy could not inhibit fine γ'precipitates, and the size of the γ' precipitates is about 40-60 nm.When slow cooling to 650℃ and then fast cooling to the room temperature, two kinds of γ' precipitates were found. One was precipitated at high temperature with the size about 200 nm and another was precipitated at low temperature with the size of 50-65 nm in average. Moreover, the big γ' precipitates which precipitated at high temperature were found to be decomposed to form finer γ' precipitates. Because the high temperature γ'\γ interface offers necessary condition for non-classical nucleation theory, any segregation area of γ' formation elements at the high temperature γ'/γ interface can act as pre-existed γ'nuclei and thus promote the precipitation of finer γ' from the saturated γ matrix. Through the short-distance diffusion of the γ' formation elements from the high temperature γ' to pre-existed γ' nuclei, the pre-existed γ' nuclei can grow to be 10-20 nm in size. At the same time, the high temperature γ' precipitates became instable due to loss of γ' formation elements and began to be decomposed as a result. The subsequent ageing promotes the decomposition of the big high temperature γ'. Key words： Ni-based high-temperature alloy    γ'phase 收稿日期: 2005-06-30      ZTFLH:  TG132.3   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 宋西平 李红宇 盖靖峰 陈国良 44.8K 链接本文: https://www.ams.org.cn/CN/      或      https://www.ams.org.cn/CN/Y2005/V41/I11/1233 [1] Yeom S J, Yoon D Y, Henry M F. Metall Trans, 1993;24A:1975 [2] Qiu Y Y. J Alloys Compd, 1998; 270: 145 [3] Furrer D U, Fecht H J. Scr Mater, 1999; 40: 1215 [4] Doi M, Miyazaki T, Wakatsuki T. Mater Sci Eng, 1984;67:247 [5] Doi M, Miyazaki T. Mater Sci Eng, 1986; 78: 87 [6] Doi M. Mater Trans JIM, 1992; 33: 637 [7] Klepser C A. Scr Metall, 1995; 33: 589 [8] Kusabiraki K, Zhang X M, Ooka T. ISM Int, 1995; 35:1115 [9] Chen G L. Superalloys. Beijing: Metallurgical Industry Press, 1987 (陈国良．高温合金学．北京:冶金工业出版社,1987) [10] Yu Y N. Principle of Metallurgy. Beijing: Metallurgical Industry Press, 1987 (余永宁,金属学原理．北京:冶金工业出版社, 2000) [11] Chen G L, Yao K F, Kou H C, Hui X D. Prog Nat Sci, 2003; 13: 1022 (陈国良,姚可夫,寇宏超,惠希东．自然科学进展,2003;13: 1022) [12] Blavette D, Bostel A, Sarrau J M. Metall Trans, 1985; 16A: 1703 [1] 郑亮, 张强, 李周, 张国庆. 增/降氧过程对高温合金粉末表面特性和合金性能的影响：粉末存储到脱气处理[J]. 金属学报, 2023, 59(9): 1265-1278. [2] 江河, 佴启亮, 徐超, 赵晓, 姚志浩, 董建新. 镍基高温合金疲劳裂纹急速扩展敏感温度及成因[J]. 金属学报, 2023, 59(9): 1190-1200. [3] 王磊, 刘梦雅, 刘杨, 宋秀, 孟凡强. 镍基高温合金表面冲击强化机制及应用研究进展[J]. 金属学报, 2023, 59(9): 1173-1189. [4] 穆亚航, 张雪, 陈梓名, 孙晓峰, 梁静静, 李金国, 周亦胄. 基于热力学计算与机器学习的增材制造镍基高温合金裂纹敏感性预测模型[J]. 金属学报, 2023, 59(8): 1075-1086. [5] 袁江淮, 王振玉, 马冠水, 周广学, 程晓英, 汪爱英. Cr2AlC涂层相结构演变对力学性能的影响[J]. 金属学报, 2023, 59(7): 961-968. [6] 张禄, 余志伟, 张磊成, 江荣, 宋迎东. GH4169高温合金热机械疲劳循环损伤机理及数值模拟[J]. 金属学报, 2023, 59(7): 871-883. [7] 刘来娣, 丁彪, 任维丽, 钟云波, 王晖, 王秋良. DZ445镍基高温合金高温长时间氧化形成的多层膜结构[J]. 金属学报, 2023, 59(3): 387-398. [8] 于少霞, 王麒, 邓想涛, 王昭东. GH3600镍基高温合金极薄带的制备及尺寸效应[J]. 金属学报, 2023, 59(10): 1365-1375. [9] 祝国梁, 孔德成, 周文哲, 贺戬, 董安平, 疏达, 孙宝德. 选区激光熔化 γ' 相强化镍基高温合金裂纹形成机理与抗裂纹设计研究进展[J]. 金属学报, 2023, 59(1): 16-30. [10] 项兆龙, 张林, XIN Yan, 安佰灵, NIU Rongmei, LU Jun, MARDANI Masoud, HAN Ke, 王恩刚. Cr含量对FeCrCoSi永磁合金调幅分解组织及其性能的影响[J]. 金属学报, 2022, 58(1): 103-113. [11] 朱玉平, 盛乃成, 谢君, 王振江, 荀淑玲, 于金江, 李金国, 杨林, 侯桂臣, 周亦胄, 孙晓峰. 高钨镍基高温合金K416B富W相的析出行为[J]. 金属学报, 2021, 57(2): 215-223. [12] 刘超, 姚志浩, 江河, 董建新. GH4720Li合金毫米级粗大晶粒热变形获得均匀等轴晶粒的可行性及工艺控制[J]. 金属学报, 2021, 57(10): 1309-1319. [13] 张小丽, 冯丽, 杨彦红, 周亦胄, 刘贵群. 二次枝晶取向对镍基高温合金晶粒竞争生长行为的影响[J]. 金属学报, 2020, 56(7): 969-978. [14] 张北江,黄烁,张文云,田强,陈石富. 变形高温合金盘材及其制备技术研究进展[J]. 金属学报, 2019, 55(9): 1095-1114. [15] 林晓冬,彭群家,韩恩厚,柯伟. 退火对热老化308L不锈钢焊材显微结构的影响[J]. 金属学报, 2019, 55(5): 555-565. Viewed Full text Abstract Cited   Shared      Discussed