Affiliation:
1. RIST Research Institute of Industrial Science and Technology
2. Research Institute of Industrial Science and Technology
3. Chosun University
Abstract
In the present study, an investigation has been carried out on the friction stir welding
(FSW) of two magnesium alloys. Hot-rolled and Die-casting plates of AZ type magnesium alloys
were successfully joined by friction stir welding. AZ31B-H24 and AZ91C-F plates with the
thickness of 4mm were used, and the microstructural development in stir zone (SZ) was
investigated using optical and scanning electron microscopes. Hardness of SZ in AZ31B-H24 alloy
has been slightly decreased due to the coarse structure. On the other hand, Hardness of SZ in
AZ91C-F alloy has been remarkably increased due to very fine recrystallized grain structure. The
result of EPMA showed Al Solid solution hardening by Solid solution of β intermetallic compound
to α-Mg. While tensile strength of the FSWelded AZ31B-H24 alloy showed about 80% values
compare to Base metal, AZ91C-F showed about 68% values due to strongly affected by formation
of the intermetallic compounds, β-Al12Mg17.
Publisher
Trans Tech Publications, Ltd.
Subject
Mechanical Engineering,Mechanics of Materials,General Materials Science
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