Precipitation in the Nugget Zone of AA6061-T6 by Friction Stir Welding

被引：0
作者：
Tao, Wang [1 ]
Yong, Zou [1 ]
Matsuda, Kenji [2 ]
机构：
[1] Shandong Univ, Minist Educ, Key Lab Liquid Struct & Hered Mat, Jinan 250061, Shandong, Peoples R China
[2] Toyama Univ, Dept Mat Sci & Technol, Fac Engn, Toyama 9308555, Japan
来源：
CHIANG MAI JOURNAL OF SCIENCE | 2016年 / 43卷 / 02期
基金：
中国国家自然科学基金;
关键词：
Friction stir welding; AA6061-T6; Transmission electronic microscopy; Precipitate; MG-SI ALLOYS; ALUMINUM-ALLOY; MECHANICAL-PROPERTIES; BETA'-PHASE; MICROSTRUCTURE; BEHAVIOR;
D O I：
暂无
中图分类号：
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号：
07 ; 0710 ; 09 ;
摘要：
Friction stir welding butt welded joints were fabricated successfully for heat-treated AA6061-T6 sheets with 5.85 mm thickness. The influences of welding parameters on structural features, precipitation kinetics and mechanical properties for the obtained welds were investigated by differential scanning calorimetry test, transmission electronic microscopy observation, electron backscattered diffraction and micro-hardness test. Results showed the hardness was influenced by the frequency of low angle gain boundary and precipitation phenomena. The rotation speed mainly has an effect on the frequency of low angle gain boundary, and the feeding speed mainly influences the evolution of precipitates. In addition to beta' and beta-Mg2Si phase in the nugget zone for all the joints, the "u-phase" was found with high feeding speed, and the TYPE-A phase with low feeding speed.
引用
收藏
页码：409 / 419
页数：11
相关论文
共 18 条
[1]   Transmission electron microscopy study of the β′ phase (Al-Mg-Si alloys) and QC phase (Al-Cu-Mg-Si alloys):: Ordering mechanism and crystallographic structure [J].
Cayron, C ;
Buffat, PA .
ACTA MATERIALIA, 2000, 48 (10) :2639-2653
[2]   Achieving ultrafine grain size in Mg-Al-Zn alloy by friction stir processing [J].
Chang, C. I. ;
Du, X. H. ;
Huang, J. C. .
SCRIPTA MATERIALIA, 2007, 57 (03) :209-212
[3]   MICROSTRUCTURE CHANGE AND ENERGY RELEASE OF FRICTION STIR WELDED Al-Mg-Si ALLOY DURING DSC TEST [J].
Dai Qilei ;
Liang Zhifang ;
Wu Jianjun ;
Meng Lichun ;
Shi Qingyu .
ACTA METALLURGICA SINICA, 2014, 50 (05) :587-593
[4]   Natural aging behaviour of friction stir welded 6005A-T6 aluminium alloy [J].
Dong, Peng ;
Sun, Daqian ;
Li, Hongmei .
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2013, 576 :29-35
[5]   Effect of welding parameters on microstructure and mechanical properties of AA6061-T6 butt welded joints by stationary shoulder friction stir welding [J].
Li, Dongxiao ;
Yang, Xinqi ;
Cui, Lei ;
He, Fangzhou ;
Shen, Hao .
MATERIALS & DESIGN, 2014, 64 :251-260
[6]   Effect of welding speed on microstructure and mechanical properties of self-reacting friction stir welded 6061-T6 aluminum alloy [J].
Liu, H. J. ;
Hou, J. C. ;
Guo, H. .
MATERIALS & DESIGN, 2013, 50 :872-878
[7]   Precipitation of dispersoids containing Mn and/or Cr in Al-Mg-Si alloys [J].
Lodgaard, L ;
Ryum, N .
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2000, 283 (1-2) :144-152
[8]   Post-β" phases and their influence on microstructure and hardness in 6xxx Al-Mg-Si alloys [J].
Marioara, CD ;
Nordmark, H ;
Andersen, SJ ;
Holmestad, R .
JOURNAL OF MATERIALS SCIENCE, 2006, 41 (02) :471-478
[9]   Cube-phase in excess Mg-type Al-Mg-Si alloy studied by EFTEM [J].
Matsuda, K ;
Ishida, Y ;
Mullerova, I ;
Frank, L ;
Ikeno, S .
JOURNAL OF MATERIALS SCIENCE, 2006, 41 (09) :2605-2610
[10]   High-resolution elemental maps for three directions of Mg2Si phase in Al-Mg-Si alloy [J].
Matsuda, K ;
Kawabata, T ;
Uetani, Y ;
Sato, T ;
Ikeno, S .
JOURNAL OF MATERIALS SCIENCE, 2002, 37 (16) :3369-3375
12