A feasibility research on friction stir welding of a new-typed lap-butt joint of dissimilar Al alloys

被引：23
作者：
Li, Bo [1 ]
Shen, Yifu [1 ]
机构：
[1] Nanjing Univ Aeronaut & Astronaut, Coll Mat Sci & Technol, Nanjing 210016, Peoples R China
来源：
MATERIALS & DESIGN | 2012年 / 34卷
基金：
中国国家自然科学基金;
关键词：
Non-ferrous metals and alloys; Welding; Mechanical; MATERIAL FLOW; MECHANICAL-PROPERTIES; PROCESS PARAMETERS; ONION RINGS; MICROSTRUCTURE; MODEL; TOOL;
D O I：
10.1016/j.matdes.2011.05.033
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A new-typed joint configuration, called lap-butt joint of dissimilar aluminum alloys, consisted of a single AA6063 plate of 4 mm thick and two overlap AA5052 plates of 2 mm thick. As needed as some engineering applications, the lap-butt joint was successfully welded through the friction stir welding technique using a designed tool of W9Mo3Cr4 V with some geometric improvements. The optimum work conditions and a process map were obtained after the welding process parameter optimization experiments. The process window was built aiming to choose the suitable processing conditions to pursue the high-quality lap-butt joints. The effects of welding parameters, especially the value of pin off-set, on weld-formation, microstructures and mechanical tensile properties of the lap-butt joints of dissimilar aluminums were investigated. The parameter of pin off-set played a very important role and exerted stronger influence upon the joint quality. Three typical micro flow-patterns of plasticized materials were found in the weld-zones: circumfluence, laminar-flow and turbulent-flow. Some weld-defects and the morphologies of 'onion rings' were detected. (C) 2011 Elsevier Ltd. All rights reserved.
引用
收藏
页码：725 / 731
页数：7
相关论文
共 33 条
[1]   On the FSW of AA2024-T4 and AA7075-T6 T-joints: an industrial case study [J].
Acerra, F. ;
Buffa, G. ;
Fratini, Livan ;
Troiano, G. .
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY, 2010, 48 (9-12) :1149-1157
[2]   Mechanical properties evolution during post-welding-heat treatments of double-lap Friction Stir Welded joints [J].
Cerri, E. ;
Leo, P. .
MATERIALS & DESIGN, 2011, 32 (06) :3465-3475
[3]   Warm and room temperature deformation of friction stir welded thin aluminium sheets [J].
Cerri, E. ;
Leo, P. .
MATERIALS & DESIGN, 2010, 31 (03) :1392-1402
[4]   Effect of tool geometry on microstructure and mechanical properties of friction stir lap welded magnesium alloy and steel [J].
Chen, Y. C. ;
Nakata, K. .
MATERIALS & DESIGN, 2009, 30 (09) :3913-3919
[5]   On the forming mechanism of banded structures in aluminium alloy friction stir welds [J].
Chen, Z. W. ;
Cui, S. .
SCRIPTA MATERIALIA, 2008, 58 (05) :417-420
[6]   Material flow and mechanical behaviour of dissimilar AA2024-T3 and AA7075-T6 aluminium alloys friction stir welds [J].
da Silva, A. A. M. ;
Arruti, E. ;
Janeiro, G. ;
Aldanondo, E. ;
Alvarez, P. ;
Echeverria, A. .
MATERIALS & DESIGN, 2011, 32 (04) :2021-2027
[7]   On the material flow in FSW of T-joints: Influence of geometrical and tecnological parameters [J].
Fratini, L. ;
Buffa, G. ;
Micari, F. ;
Shivpuri, R. .
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY, 2009, 44 (5-6) :570-578
[8]   Influence of material characteristics on plastomechanics of the FSW process for T-joints [J].
Fratini, L. ;
Buffa, G. ;
Shivpuri, R. .
MATERIALS & DESIGN, 2009, 30 (07) :2435-2445
[9]   A process model for friction stir welding of age hardening aluminum alloys [J].
Frigaard, O ;
Grong, O ;
Midling, OT .
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 2001, 32 (05) :1189-1200
[10]   Flow patterns during friction stir welding [J].
Guerra, A ;
Schmidt, C ;
McClure, JC ;
Murr, LE ;
Nunes, AC .
MATERIALS CHARACTERIZATION, 2002, 49 (02) :95-101
1234