Microstructure and Fatigue Properties of Ultrasonic Spot Welded Joints of Aluminum 5754 Alloy

被引：18
作者：
Mirza, F. A. [1 ]
Macwan, A. [1 ]
Bhole, S. D. [1 ]
Chen, D. L. [1 ]
机构：
[1] Ryerson Univ, Dept Mech & Ind Engn, 350 Victoria St, Toronto, ON M5B 2K3, Canada
来源：
JOM | 2016年 / 68卷 / 05期
基金：
加拿大创新基金会; 加拿大自然科学与工程研究理事会;
关键词：
DYNAMIC RECRYSTALLIZATION; MECHANICAL-PROPERTIES; STRENGTH; MAGNESIUM; ENERGY; STEEL;
D O I：
10.1007/s11837-015-1796-7
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The purpose of this investigation was to evaluate the microstructural change, lap shear tensile load, and fatigue resistance of ultrasonic spot welded joints of aluminum 5754 alloy for automotive applications. A unique "necklace"-type structure with very fine equiaxed grains was observed to form along the weld line due to the mechanical interlocking coupled with the occurrence of dynamic recrystallization. The maximum lap shear tensile strength of 85 MPa and the fatigue limit of about 0.5 kN (at 1 x 10(7) cycles) were achieved. The tensile fracture occurred at the Al/Al interface in the case of lower energy inputs, and at the edge of nugget zone in the case of higher energy inputs. The maximum cyclic stress for the transition of fatigue fracture mode from the transverse through-thickness crack growth to the interfacial failure increased with increasing energy input. Fatigue crack propagation was mainly characterized by the formation of fatigue striations, which usually appeared perpendicular to the fatigue crack propagation.
引用
收藏
页码：1465 / 1475
页数：11
相关论文
共 29 条
[1]   Microstructural characterization of ultrasonically welded aluminum [J].
Allameh, SM ;
Mercer, C ;
Popoola, D ;
Soboyejo, WO .
JOURNAL OF ENGINEERING MATERIALS AND TECHNOLOGY-TRANSACTIONS OF THE ASME, 2005, 127 (01) :65-74
[2]   Mechanisms of joint and microstructure formation in high power ultrasonic spot welding 6111 aluminium automotive sheet [J].
Bakavos, D. ;
Prangnell, P. B. .
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2010, 527 (23) :6320-6334
[3]   Effect of reduced or zero pin length and anvil insulation on friction stir spot welding thin gauge 6111 automotive sheet [J].
Bakavos, D. ;
Prangnell, P. B. .
SCIENCE AND TECHNOLOGY OF WELDING AND JOINING, 2009, 14 (05) :443-456
[4]   Low-Voltage K-Band Divide-by-3 Injection-Locked Frequency Divider With Floating-Source Differential Injector [J].
Chen, Yi-Tsung ;
Li, Ming-Wei ;
Kuo, Hsin-Chih ;
Huang, Tzuen-Hsi ;
Chuang, Huey-Ru .
IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES, 2012, 60 (01) :60-67
[5]   Lap shear strength and fatigue life of friction stir spot welded AZ31 magnesium and 5754 aluminum alloys [J].
Chowdhury, S. H. ;
Chen, D. L. ;
Bhole, S. D. ;
Cao, X. ;
Wanjara, P. .
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2012, 556 :500-509
[6]   Opportunities and challenges for a sustainable energy future [J].
Chu, Steven ;
Majumdar, Arun .
NATURE, 2012, 488 (7411) :294-303
[7]  
Daniels H., 1965, ULTRASONICS, V3, P190, DOI DOI 10.1016/0041-624X(65)90169-1
[8]   Temperature and stress distribution in ultrasonic metal welding-An FEA-based study [J].
Elangovan, S. ;
Semeer, S. ;
Prakasan, K. .
JOURNAL OF MATERIALS PROCESSING TECHNOLOGY, 2009, 209 (03) :1143-1150
[9]   Effect of Zinc Coatings on Joint Properties and Interfacial Reactions in Aluminum to Steel Ultrasonic Spot Welding [J].
Haddadi, F. ;
Strong, D. ;
Prangnell, P. B. .
JOM, 2012, 64 (03) :407-413
[10]   Microstructure characterization of 7050 aluminum alloy during dynamic recrystallization and dynamic recovery [J].
Hu, H. E. ;
Zhen, L. ;
Zhang, B. Y. ;
Yang, L. ;
Chen, J. Z. .
MATERIALS CHARACTERIZATION, 2008, 59 (09) :1185-1189
123