Please wait a minute...
金属学报  2014, Vol. 50 Issue (6): 685-690    DOI: 10.3724/SP.J.1037.2013.00733
  论文 本期目录 | 过刊浏览 |
Al-Mg-Si合金时效早期显微组织演变及其对强化的影响*
汪波, 王晓姣, 宋辉, 严菊杰, 邱涛, 刘文庆, 李慧
(上海大学微结构重点实验室, 上海 200444)
STRENGTHENING EFFECTS OF MICROSTRUCTURE EVOLUTION DURING EARLY AGEING PROCESS IN Al-Mg-Si ALLOY
WANG Bo, WANG Xiaojiao, SONG Hui, YAN Jujie, QIU Tao, LIU Wenqing, LI Hui
Key Laboratory for Microstructures, Shanghai University, Shanghai 200444
全文: PDF(2453 KB)   HTML
摘要: 

采用显微硬度测试、HRTEM和原子探针层析技术(APT)等测试手段分析了核元件燃料包壳备选材料LT24铝合金在180 ℃人工时效早期显微硬度、组织变化及析出序列中析出物的Mg与Si原子比(r). 结果表明, 在180 ℃时效初期, 合金的硬度显著增加, 析出高数量密度的溶质原子团簇和球状Guinier-Preston (GP)区; 时效4 h后达到硬度峰值, 析出物以高数量密度的针状 相为主; 进一步时效, 合金处于一硬度平台, 析出物仍以 相为主. 随时效时间的延长, 析出相逐渐长大, r逐渐增加, 相中r在1.23~1.35之间, 相对合金的强化起最重要作用. 在早期时效过程中合金析出物的析出序列为过饱和固溶体→溶质原子团簇→溶质原子团簇+GP区→溶质原子团簇+GP区+ 相.

关键词 铝合金溶质原子团簇纳米析出相析出强化原子探针层析技术    
Abstract:The microstructure evolution, atomic ratio (r) of Mg and Si in different precipitates, and precipitation strengthening effects during the ageing process were investigated by HRTEM, atom probe tomography (APT) and hardness testing in LT24 aluminum alloy used for nuclear fuel cladding alternative materials. The results show that the early stage of ageing at 180 ℃ led to a significantly increasing of hardness and the formation of high density of solute clusters and Guinier-Preston (GP) zones in the alloy. The alloy reaches peak hardness after ageing at 180 ℃ for 4 h due to a significant increasing density of the precipitates. After the peak hardness, a hardness plateau is maintained for longer ageing time, because of the precipitate is still the main strengthening phase in the specimens. The precipitates grow larger and the r increases with the increasing of ageing time. The r in needles changes from 1.23 to 1.35. needles are the main precipitation strengthening phase of the alloy. The precipitation sequence during the early ageing treatment in alloy can be described as follows: supersaturated solid solution →solute atom clusters→solute atom clusters+GP zone→solute atom clusters+GP zone+.
Key wordsaluminium alloy    solute atom cluster    nanoprecipitation    precipitation strengthening    atom probe tomography
收稿日期: 2013-11-14     
ZTFLH:  TG146.21  
基金资助:* 国家自然科学基金项目 51301103, 中国博士后科学基金项目 2013M541507, 上海市科学技术委员会重点项目 12JC1404000和上海大学创新基金项目资助
Corresponding author: LI Hui, assistant professor, Tel: 18017086586, E-mail: huili@shu.edu.cn   
作者简介: 汪 波, 男, 1987年生, 硕士生

引用本文:

汪波, 王晓姣, 宋辉, 严菊杰, 邱涛, 刘文庆, 李慧. Al-Mg-Si合金时效早期显微组织演变及其对强化的影响*[J]. 金属学报, 2014, 50(6): 685-690.
WANG Bo, WANG Xiaojiao, SONG Hui, YAN Jujie, QIU Tao, LIU Wenqing, LI Hui. STRENGTHENING EFFECTS OF MICROSTRUCTURE EVOLUTION DURING EARLY AGEING PROCESS IN Al-Mg-Si ALLOY. Acta Metall Sin, 2014, 50(6): 685-690.

链接本文:

https://www.ams.org.cn/CN/10.3724/SP.J.1037.2013.00733      或      https://www.ams.org.cn/CN/Y2014/V50/I6/685

[1] Shang B C, Yin Z M, Wang G, Liu B, Huang Z Q. Mater Des, 2011; 32: 3818
[2] Marioara C D, Andersen S J, Jansen J, Zandbergen H W. Acta Mater, 2003; 51: 789
[3] Jin M, Li J, Shao G J. J Alloys Compd, 2007; 437: 146
[4] Wang H, Sun Y Z, Zhang W G, Bi A T, Kang Y L, Li W. At Energy Sci Technol, 1999; 33: 134
(王 辉, 孙源珍, 张伟国, 毕安泰, 康亚伦, 李 伟. 原子能科学与技术, 1999; 33: 134)
[5] Yang W C, Wang M P, Sheng X F, Zhang Q, Wang Z A. Acta Metall Sin, 2010; 46: 1481
(杨文超, 汪明朴, 盛晓菲, 张 茜, 王正安. 金属学报, 2010; 46: 1481)
[6] Yassar R S, Field D P, Weiland H. Scr Mater, 2005; 53: 299
[7] Edwards G A, Stiller K, Dunlop G L, Couper M J. Acta Metall, 1998; 46: 3893
[8] Starink M J, Cao L F, Rometsch P A. Acta Mater, 2012; 60: 4194
[9] Tors?ter M, Hasting H S, Lefebvre W, Marioara C D, Walmsley J C, Andersen S J, Holmestad R. J Appl Phys, 2010; 108: 1
[10] Murayama M, Hono K, Saga M, Kikuchi M. Mater Sci Eng, 1988; A250: 127
[11] Murayama M, Hono K. Acta Mater, 1999; 47: 1537
[12] Zandbergen H W, Andersen S J, Jansen J. Science, 1997; 277: 1221
[13] Marioara C D, Nordmark H, Andersen S J, Holmestad R. J Mater Sci, 2006; 41: 471
[14] Hasting H S, Froseth A G, Andersen S J, Vissers R, Walmsley J C, Marioara C D. J Appl Phys, 2009; 106: 2
[15] Marioara C D, Andersen S J, Zandbergen H W, Holmestad R. Metall Trans, 2005; 36A: 691
[16] Serizawa A, Sato T, Poole W J. Philos Mag Lett, 2010; 90: 279
[17] Buha J, Lumley R N, Crosky A G,Hono K. Acta Mater, 2007; 55: 3015
[18] Esmaeili S, Lloyd D J, Poole W J. Acta Mater, 2003; 51: 3467
[19] Pogatscher S, Antrekowitsch H, Leitner H, Ebner T, Uggowitzer P J. Acta Mater, 2011; 59: 3352
[20] Sha G, Ringer S P. Ultramicroscopy, 2009; 109: 508
[21] Abid T, Boubertakh A, Hamamda S. J Alloys Compd, 2010; 490: 166
[22] Rometsch P A, Cao L F, Xiong X F, Muddle B C. Ultramicroscopy, 2011; 111: 690
[23] Pogatscher S, Antrekowitsch H, Leitner H, Poschmann D, Zhang Z L, Uggowitzer P J. Acta Mater, 2012; 60: 4496
[24] Sha G, Mller H, Stumpf W E, Xia J H, Govender G, Ringer S P. Acta Mater, 2012; 60: 692
[25] Rinderer B, Couper M, Xiong X, Gao S, Nie J F. Mater Sci Forum, 2010; 654-656: 590
[26] Chang C S T, Wieler I, Wanderka N, Banhart J. Ultramicroscopy, 2009; 109: 585
[1] 梁孟超, 陈良, 赵国群. 人工时效对2A12铝板力学性能和强化相的影响[J]. 金属学报, 2020, 56(5): 736-744.
[2] 罗海文,沈国慧. 超高强高韧化钢的研究进展和展望[J]. 金属学报, 2020, 56(4): 494-512.
[3] 王力,董超芳,张达威,孙晓光,Thee Chowwanonthapunya,满成,肖葵,李晓刚. 合金元素对铝合金在泰国曼谷地区初期腐蚀行为的影响[J]. 金属学报, 2020, 56(1): 119-128.
[4] 吉华,邓运来,徐红勇,郭伟强,邓建峰,范世通. 焊接线能量对5182-O/HC260YD+Z异种材料CMT搭接接头组织与性能的影响[J]. 金属学报, 2019, 55(3): 376-388.
[5] 田银宝, 申俊琦, 胡绳荪, 勾健. 丝材+电弧增材制造钛/铝异种金属反应层的研究[J]. 金属学报, 2019, 55(11): 1407-1416.
[6] 宋元元, 赵明久, 戎利建. Fe-Ni基合金时效过程中γ'相析出的原子探针层析技术研究[J]. 金属学报, 2018, 54(9): 1236-1244.
[7] 邵盈恺, 王玉玺, 杨志斌, 史春元. 基于焊缝熔深优化的7075铝合金等离子-MIG复合焊接热裂纹敏感性[J]. 金属学报, 2018, 54(4): 547-556.
[8] 刘政, 陈志平, 陈涛. 坩埚尺寸和电磁频率对半固态A356铝合金浆料流动的影响[J]. 金属学报, 2018, 54(3): 435-442.
[9] 于菁, 王继杰, 倪丁瑞, 肖伯律, 马宗义, 潘兴龙. 电子束熔丝沉积快速成形2319铝合金的微观组织与力学性能[J]. 金属学报, 2018, 54(12): 1725-1734.
[10] 张玉圣, 王友彬, 李纯民, 周秉涛, 程珂珂, 韦悦周. 6061铝合金表面ZnAl-LDHs层的制备及其耐腐蚀性能[J]. 金属学报, 2018, 54(10): 1417-1427.
[11] 梅益, 孙全龙, 喻丽华, 王传荣, 肖华强. 基于GA-ELM的铝合金压铸件晶粒尺寸预测[J]. 金属学报, 2017, 53(9): 1125-1132.
[12] 陈瑞, 许庆彦, 郭会廷, 夏志远, 吴勤芳, 柳百成. Al-7Si-Mg铝合金拉伸过程应变硬化行为及力学性能模拟研究[J]. 金属学报, 2017, 53(9): 1110-1124.
[13] 林艳丽, 何祝斌, 初冠南, 闫永达. 利用管状试样测试各向异性材料双向应力状态力学性能的新方法[J]. 金属学报, 2017, 53(9): 1101-1109.
[14] 侯陇刚, 刘明荔, 王新东, 庄林忠, 张济山. 高强7050铝合金超低温大变形加工与组织、性能调控[J]. 金属学报, 2017, 53(9): 1075-1090.
[15] 陈军洲, 吕良星, 甄良, 戴圣龙. AA 7055铝合金时效析出过程的小角度X射线散射定量表征[J]. 金属学报, 2017, 53(8): 897-906.