scholarly journals Microstructure and mechanical properties of friction stir welds of AC4CH semisolid-cast aluminum alloy

2019 ◽  
Vol 69 (11) ◽  
pp. 536-540
Author(s):  
Masashi Takahashi ◽  
Masakatsu Maeda ◽  
Kensuke Yamamoto ◽  
Yoshinori Kamikubo ◽  
Yasuo Sugiura ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Aluminum Alloy ◽  
Cast Aluminum Alloy ◽  
Cast Aluminum ◽  
Friction Stir ◽  
Microstructure And Mechanical Properties

Friction Stir Lap Joining of AC4C Cast Aluminum Alloy and Zinc-Coated Steel

2008 ◽  
Vol 580-582 ◽  
pp. 371-374 ◽  
Author(s):  
Y.C. Chen ◽  
T. Komazaki ◽  
Y.G. Kim ◽  
Takuya Tsumura ◽  
Kazuhiro Nakata
Keyword(s):  
Mechanical Properties ◽  
Aluminum Alloy ◽  
Intermetallic Compounds ◽  
Welding Speed ◽  
Base Material ◽  
Cast Aluminum Alloy ◽  
Coated Steel ◽  
Cast Aluminum ◽  
Friction Stir ◽  
Zinc Coated Steel

AC4C cast aluminum alloy and zinc-coated steel were friction stir lap welded, and the microstructures and mechanical properties of the joints were examined and analyzed. Experimental results show that the welding speeds have a significant effect on the tensile properties and fracture locations of the joints at a rotational speed of 1500 rpm. When the welding speed is higher than 60 mm/min, the joints fracture in the zinc-coated steel base material and the tensile strength is equal to that of the zinc-coated steel; when the welding speed is lower than 60 mm/min, the joints fracture in the interface and the shear strength is about 50 MPa. The change of the fracture locations is attributed to the presence of large quantity intermetallic compounds adjacent to the interface of the joints. The composition and formation mechanism of the intermetallic compounds and its effect on the mechanical properties of the joints were discussed.

scholarly journals Microstructure and Mechanical Properties of Friction Stir Processed A356 Cast Al under Air Cooling and Water Cooling

2018 ◽  
Vol 37 (7) ◽  
pp. 693-699
Author(s):  
Xinxin Ai ◽  
Yumei Yue
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Base Material ◽  
Cast Aluminum Alloy ◽  
Air Cooling ◽  
Water Cooling ◽  
Cast Aluminum ◽  
Friction Stir ◽  
Cooling Conditions ◽  
Microstructure And Mechanical Properties

AbstractIn this work, friction stir processing (FSP) was used to modify the microstructure of A356 cast aluminum alloy under air cooling and water cooling conditions. The microstructure and mechanical properties of air cooling and water cooling FSP specimens and their differences were mainly discussed. Results show that the grains can be significantly refined after FSP under both air cooling and water cooling conditions. The water cooling FSP specimen shows much smaller grains than the air cooling FSP specimen due to lower temperature. Similarly, the Si particles of water cooling FSP specimen show much smaller sizes and better distribution. Both the air cooling FSP specimen and water cooling FSP specimen own much higher tensile strength and elongation than A356 base material (BM). In particular, the tensile strength and elongation of water cooling specimen are respectively 231 Mpa and 14.15%, which are equal to 186.3% and 1088.5% of the BM. Furthermore, the microhardness of water cooling FSP specimen is lower than that of the air cooling FSP specimen.

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