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E-raamat: Welding and Joining of Magnesium Alloys

Edited by (Dalian University of Technology, China)
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Due to the wide application of magnesium alloys in metals manufacturing, it is very important to employ a reliable method of joining these reactive metals together and to other alloys. 

Welding and Joining of Magnesium Alloys
provides a detailed review of both established and new techniques for magnesium alloy welding and their characteristics, limitations and applications. Part one covers general issues in magnesium welding and joining, such as welding materials, metallurgy and the joining of magnesium alloys to other metals such as aluminium and steel. The corrosion and protection of magnesium alloy welds are also discussed. In part two particular welding and joining techniques are reviewed, with chapters covering such topics as inert gas welding, metal inert gas welding and laser welding, as well as soldering, mechanical joining and adhesive bonding. The application of newer techniques to magnesium alloys, such as hybrid laser-arc welding, activating flux tungsten inert gas welding and friction stir, is also discussed. 

With its distinguished editor and expert team of contributors, Welding and Joining of Magnesium Alloys is a comprehensive reference for producers of primary magnesium and those using magnesium alloys in the welding, automotive and other such industries, as well as academic researchers in metallurgy and materials science.

This book covers all aspects of the welding and joining of magnesium alloys. Magnesium and its alloys have been used for many years and their use is increasing due to their superior properties and lightweight. Part 1 includes welding metallurgy, preparation for welding and welding materials. Part 2 covers the various welding technologies that can be used for joining magnesium alloys and part 3 includes other joining technologies, weld defects and corrosion protection.
Contributor contact details xi
Part I General
1(94)
1 Introduction to the welding and joining of magnesium
3(6)
L. Liu
1.1 Background
3(1)
1.2 Characteristics of magnesium alloy welded joints under dynamic load
4(1)
1.3 Efficient gas metal arc welding of magnesium alloys
5(1)
1.4 Dissimilar welding of magnesium alloys to other metals
6(1)
1.5 References
7(2)
2 Welding metallurgy of magnesium alloys
9(7)
L. Liu
2.1 Introduction
9(1)
2.2 Weldability of magnesium alloys
10(2)
2.3 Weldability of magnesium alloys to other metals
12(2)
2.4 References
14(2)
3 Preparation for welding of magnesium alloys
16(7)
L. Liu
3.1 Introduction
16(1)
3.2 Surface treatment of magnesium alloys
16(2)
3.3 Welding groove for magnesium alloys
18(2)
3.4 Preheating and postweld treatments for magnesium alloys
20(2)
3.5 References
22(1)
4 Welding materials for magnesium alloys
23(15)
L. Liu
4.1 Introduction
23(4)
4.2 Hot extrusion process of welding materials
27(5)
4.3 Component design of welding materials
32(2)
4.4 Hot pull process of welding materials
34(1)
4.5 Microstructure and strength of welding materials
35(1)
4.6 References
36(2)
5 Welding and joining of magnesium alloys to aluminum alloys
38(25)
L. Liu
5.1 Introduction
38(1)
5.2 Hybrid laser-tungsten inert gas welding of magnesium and aluminum
39(5)
5.3 Diffusion bonding magnesium to aluminum technology
44(5)
5.4 Laser weld bonding magnesium to aluminum technology
49(11)
5.5 Conclusion and future trends
60(1)
5.6 References
61(2)
6 The joining of magnesium alloy to steel
63(16)
L. Liu
6.1 Introduction
63(1)
6.2 Existing problems in the joining of magnesium alloys to steel
64(2)
6.3 Welding principles for the joining of magnesium alloys to steel
66(3)
6.4 Direct joining of magnesium alloys to mild steel
69(5)
6.5 Nickel-added joining of magnesium alloys to steel
74(3)
6.6 Conclusion and future trends
77(1)
6.7 References
77(2)
7 Corrosion and protection of magnesium alloy welds
79(16)
L. Liu
7.1 Introduction
79(1)
7.2 Corrosion characteristics of magnesium alloy weldment
80(6)
7.3 Improvement in the corrosion resistance of magnesium alloy weldment
86(6)
7.4 Conclusion and future trends
92(1)
7.5 References
93(2)
Part II Particular welding and joining techniques
95(285)
8 Brazing and soldering of magnesium alloys
97(25)
T. Watanabe
8.1 Surface preparation of magnesium alloys before joining
97(6)
8.2 Brazing of magnesium alloys using flux and filler metal
103(9)
8.3 Ultrasonic brazing of magnesium alloys with no flux
112(5)
8.4 Soldering of magnesium alloys
117(3)
8.5 References
120(2)
9 Mechanical joining of magnesium alloys
122(27)
M. Heger
M. Horstmann
9.1 Introduction
122(1)
9.2 Technologies with pre-punching operation and one-sided accessibility
123(7)
9.3 Technologies with pre-punching operation and two-sided accessibility
130(3)
9.4 Technologies without pre-punching operation and one-sided accessibility
133(5)
9.5 Technologies without pre-punching operation and two-sided accessibility
138(7)
9.6 Linear technology: hemming
145(2)
9.7 References
147(2)
10 Adhesive bonding of magnesium alloys
149(11)
L. Liu
10.1 Introduction
149(1)
10.2 Surface treatments of magnesium alloys
149(5)
10.3 Adhesive for the bonding of magnesium alloys
154(1)
10.4 Cure for the bonding of magnesium alloys
154(1)
10.5 Applications of the bonding of magnesium alloys
154(4)
10.6 Future trends
158(1)
10.7 References
158(2)
11 Gas-tungsten arc welding of magnesium alloys
160(18)
L. Liu
11.1 Introduction
160(1)
11.2 Gas-tungsten arc welding of magnesium alloys without filling wire
161(7)
11.3 Gas-tungsten arc filler welding of magnesium alloys
168(7)
11.4 References
175(3)
12 Metal inert gas welding of magnesium alloys
178(19)
G. Song
12.1 Introduction
178(1)
12.2 Pulsed metal inert gas welding for magnesium alloys
179(6)
12.3 Alternating current metal inert gas welding for magnesium alloys
185(9)
12.4 Conclusion and future trends
194(1)
12.5 References
194(3)
13 Variable polarity plasma arc welding of magnesium alloys
197(32)
Z.D. Zhang
13.1 Introduction
197(2)
13.2 Variable polarity plasma arc welding of magnesium alloys
199(12)
13.3 Variable polarity plasma arc weld bonding of magnesium alloys
211(15)
13.4 Conclusion and future trends
226(1)
13.5 References
227(2)
14 Hybrid laser-arc welding of magnesium alloys
229(24)
G. Song
14.1 Introduction
229(1)
14.2 Low-power laser/arc hybrid welding of magnesium
230(14)
14.3 Hybrid welding process with filler metal
244(6)
14.4 Practical application
250(1)
14.5 Conclusion and future trends
251(1)
14.6 References
251(2)
15 Activating flux tungsten inert gas welding of magnesium alloys
253(21)
Z.D. Zhang
15.1 Introduction
253(1)
15.2 Welding mechanism
254(4)
15.3 Welding parameters
258(9)
15.4 Microstructure of welding joints
267(4)
15.5 Mechanical properties
271(1)
15.6 Future trends
272(1)
15.7 References
272(2)
16 Friction stir welding of magnesium alloys
274(32)
H. Zhang
16.1 Introduction
274(2)
16.2 Welding parameters and procedures
276(4)
16.3 Welding tools and equipment
280(2)
16.4 Materials that have been or are being friction stir welded
282(1)
16.5 Typical microstructures of friction stir welded magnesium alloys
282(7)
16.6 Properties of friction stir welded magnesium alloys
289(6)
16.7 Weld defects of friction stir welded magnesium alloys
295(5)
16.8 Applications of friction stir welded magnesium alloys
300(1)
16.9 Future trends and sources of further information and advice
301(1)
16.10 Acknowledgements
301(1)
16.11 References
301(5)
17 Laser welding of magnesium alloys
306(45)
J. Shan
17.1 Introduction
306(1)
17.2 Character of the laser welding process and influence of laser welding parameters
307(11)
17.3 Laser welding of magnesium alloys
318(4)
17.4 Microstructure and properties of laser welding of magnesium alloys
322(10)
17.5 Typical defects of laser welding of magnesium alloys
332(14)
17.6 Outlook and future trends
346(1)
17.7 References
347(4)
18 Resistance spot welding of magnesium alloys
351(16)
L. Liu
J. Feng
Y. Zhou
18.1 Introduction
351(1)
18.2 Fundamentals of resistance spot welding
351(3)
18.3 Welding conditions: surface
354(4)
18.4 Welding conditions: welding parameters
358(1)
18.5 Nugget growth and microstructure
359(3)
18.6 Welding of magnesium alloys to other alloys
362(1)
18.7 Equipment for the welding of magnesium alloys
363(1)
18.8 Future trends
364(1)
18.9 References
365(2)
19 Electromagnetic pulse welding of magnesium to aluminium sheets
367(13)
S. Kore
J. Imbert
Y. Zhou
M. Worswick
19.1 Introduction
367(1)
19.2 Fundamental theory of electromagnetic welding
368(1)
19.3 Equipment for electromagnetic welding
369(3)
19.4 Welding technique and materials
372(2)
19.5 Mechanical and metallurgical testing of welds
374(3)
19.6 Safety guidelines while handling the electromagnetic welding setup
377(1)
19.7 References
378(2)
Index 380
Dr Liming Liu is a Professor in the School of Materials Science and Engineering at Dalian University of Technology, China.