On the Joint Formation and Interfacial Microstructure of Cold Metal Transfer Cycle Step Braze Welding of Aluminum to Steel Butt Joint

被引：19

作者：

Chen, James ^{[1
]}

Shalchi Amirkhiz, Babak ^{[1
]}

Zhang, Ruby ^{[1
]}

Rona, Brian ^{[2
]}

机构：

[1] CanmetMAT Nat Resources Canada, Hamilton, ON L8P 0A5, Canada

[2] Adv Pump Repair Serv Inc, Cambridge, ON N1T 2K8, Canada

来源：

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE | 2020年 / 51卷 / 10期

关键词：

INTERMETALLIC COMPOUND LAYER; MECHANICAL-PROPERTIES; SOLID IRON; AL-ALLOY; FE; GROWTH; STRENGTH; SILICON; PHASES; MIG;

D O I：

10.1007/s11661-020-05917-8

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Cold metal transfer cycle step braze welding process was modified to successfully produce an aluminum alloy/Zn-coated steel linear joint with a closed square butt joint configuration. The braze-welded joint shows wide-spreading and low wetting angle of molten filler alloy on both sides of the steel. The butt joint is formed by the overlapping of individual spot braze welds during cold metal transfer cycle step braze welding. The microstructure at the front, backside, and face side interface of the Al/steel joint were characterized in terms of the crystal structure, morphology, and thickness of intermetallic compounds by scanning electron microscopy, analytical transmission electron microscopy, and energy dispersive X-ray spectroscopy. The interfacial structure of Al/tau(5(H))-Al8Fe2Si(film-like)/theta-Al3Fe(rod-like)/theta-Al3Fe(500 nm)/eta-Al5Fe2(2.5 mu m)/Fe is formed at the front interface associated with high-temperature interaction between liquid Al alloy and Zn-coated steel. On the contrary, Al/tau(5(C))-Al-8(Fe,Mn)(2)Si/tau(5(H))-Al8Fe2Si/theta-Al3Fe(1.2 mu m)/eta-Al5Fe2(500 nm)/Fe is present at the backside interface associated with relatively low-temperature interaction between liquid Al alloy and Zn-coated steel. The intermetallic compounds and morphology at the face interface associated with medium temperature interaction are similar to those at the backside interface. However, the thickness of the eta-Al(5)Fe(2)layer is only 220 nm, which is caused as a result of the interaction of molten Al filler alloy with the bare steel sheared surface without Zn coating. The mechanism for the formation of varied intermetallic compounds at the different interfaces is discussed.

引用

页码：5198 / 5212

页数：15

共 49 条

[1] Effect of Steel Galvanization on the Microstructure and Mechanical Performances of Planar Magnetic Pulse Welds of Aluminum and Steel [J].

Avettand-Fenoel, M. -N. ;

Khalil, C. ;

Taillard, R. ;

Racineux, G. .

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 2018, 49A (07) :2721-2738

[2] Kinetic interactions between solid iron and molten aluminium [J].

Bouayad, A ;

Gerometta, C ;

Belkebir, A ;

Ambari, A .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2003, 363 (1-2) :53-61

[3] Intermetallic compound layer growth between solid iron and molten aluminium [J].

Bouche, K ;

Barbier, F ;

Coulet, A .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 1998, 249 (1-2) :167-175

[4]

Bouche K., 2002, MAT SCI ENG A-STRUCT, V249, P167

[5]

Chen B., 2018, J MATER PROCESS TECH, V258, P9

[6] Formation of nanometer scale intermetallic phase at interface of aluminum-to-steel spot joint by welding-brazing process [J].

Chen, J. ;

Li, J. ;

Amirkhiz, B. Shalchi ;

Liang, J. ;

Zhang, R. .

MATERIALS LETTERS, 2014, 137 :120-123

[7] Interaction Between the Growth and Dissolution of Intermetallic Compounds in the Interfacial Reaction Between Solid Iron and Liquid Aluminum [J].

Chen, Shuhai ;

Yang, Dongdong ;

Zhang, Mingxin ;

Huang, Jihua ;

Zhao, Xingke .

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 2016, 47A (10) :5088-5100

[8] Effect of silicon on the formation of intermetallic phases in aluminide coating on mild steel [J].

Cheng, Wei-Jen ;

Wang, Chaur-Jeng .

INTERMETALLICS, 2011, 19 (10) :1455-1460

[9] Microstructural evolution of intermetallic layer in hot-dipped aluminide mild steel with silicon addition [J].

Cheng, Wei-Jen ;

Wang, Chaur-Jeng .

SURFACE & COATINGS TECHNOLOGY, 2011, 205 (19) :4726-4731

[10]

Clements P.D., 1994, INT MATER REV, V39, P191

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