Semi-Solid Stirring Brazing of SiCp/A356 Composites and Aluminum Alloy in Air

2011 ◽  
Vol 189-193 ◽  
pp. 3521-3524 ◽  
Author(s):  
Hui Bin Xu ◽  
Quan Xiang Luo ◽  
Chun Tian Li ◽  
Chang Hua Du
Keyword(s):  
Aluminum Alloy ◽  
Oxide Film ◽  
Weld Seam ◽  
Filler Metal ◽  
Joint Region ◽  
Base Materials ◽  
Semi Solid ◽  
Micro Structures ◽  
Two Sides ◽  
Sic Particle

The semi-solid brazing process of SiCp/A356 composites and aluminum alloy was investigated. The two substrates were heated up to the semisolid temperature range of Zn-Al filler metal in the joint region by a resistance heating plate. At this point a stirrer was introduced into the weld seam in order to mix filler metal and the two sides of substrates into a single uniform joint. After stirring, specimens were sectioned for analysis of macro- and micro-structures along the weld region. The research shows that SiCp/A356 composites and aluminum can be successfully joining with semi-solid filler metal. It can be found that most of the oxide film on the surface of the base metal was disrupted and removed through the observation by SEM. The metallurgical bonds formed between the filler metal and the base materials. Moreover, the oxide film of surface of aluminum alloy was more thoroughly disrupted and removed than that of surface of composites with existing of Sic particle. The joint microstructure with globular α-Al grain enclosed by rich-Zn phase can be obtained after stirring brazing.

Vacuum-Free Stirring Brazing of SiCP/A356 Composites and Aluminum Alloy Using Semisolid Filler Metal with Low Solid Fraction

2011 ◽  
Vol 306-307 ◽  
pp. 738-741
Author(s):  
Hui Bin Xu ◽  
Quan Xiang Luo ◽  
Liang Xing ◽  
Bo Fang Zhou ◽  
You Liang Zeng ◽  
...  
Keyword(s):  
Aluminum Alloy ◽  
Oxide Film ◽  
Base Metal ◽  
Weld Seam ◽  
Filler Metal ◽  
Joint Region ◽  
Base Materials ◽  
Semi Solid ◽  
Micro Structures ◽  
Sic Particle

This paper explores the brazing process of SiCp/A356 composites and aluminum alloy using semisolid metal. The two substrates were heated up to the semisolid temperature range of Zn-Al filler metal in the joint region by a resistance heating plate. In order to mix the filler metal with the base metal of both sides to be a single uniform joint, a stirrer was introduced into the weld seam. After stirring, specimens were sectioned for analysis of macro- and micro-structures along the weld region. The research shows that SiCp/A356 composites and aluminum can be local joined with semi-solid filler metal. It can be found that part of the oxide film on the interface of the base metal was disrupted and removed through the observation by SEM. The metallurgical bonds can be formed between the filler metal and the base materials. Moreover, the oxide film of surface of aluminum alloy disrupted and removed was easier than that of surface of composites with existing of Sic particle. The joint microstructure with globular α-Al grain enclosed by rich-Zn phase can be obtained after stirring brazing.

Study of Brazeability of SiCP/A356 Composites and Aluminum Alloy Using Semisolid Metal with High Solid Fraction by Stirring

2011 ◽  
Vol 239-242 ◽  
pp. 663-666 ◽  
Author(s):  
Hui Bin Xu ◽  
Quan Xiang Luo ◽  
Jin Ying He ◽  
Bo Fang Zhou ◽  
You Liang Zeng ◽  
...  
Keyword(s):  
Aluminum Alloy ◽  
Oxide Film ◽  
Base Metal ◽  
Filler Metal ◽  
2024 Aluminum Alloy ◽  
Base Materials ◽  
High Solid Fraction ◽  
Semi Solid ◽  
Micro Structures ◽  
Semisolid Metal

The semi-solid brazing process of SiCp/A356 composites and 2024 aluminum alloy using Zn-Al eutectic filler metal at 450 °C has been investigated. The two substrates and Zn-Al filler metal were heated up to the semisolid temperature range of Zn-Al filler metal by a resistance heating plate. In order to mix the filler metal with the base metal of both sides to be a single uniform joint, a stirrer was introduced into the weld seam. After stirring, specimens were sectioned for analysis of macro- and micro-structures along the weld region. The research shows that SiCp/A356 composites and aluminum can be joining by semisolid metal. It can be found that almost half of the oxide film on the surface of the base metal was disrupted and removed through the observation by SEM. The metallurgical bonds formed between the filler metal and the base materials on the interface of oxide had been disrupted. Moreover, the oxide film of surface of aluminum alloy was more thoroughly disrupted and removed than that of surface of composites with existing of SiC particle.

Study on Stirring Brazing of SiCp/A356 Composites with the Zn27Al Filler Alloy in Air

2011 ◽  
Vol 383-390 ◽  
pp. 2710-2713
Author(s):  
Hui Bin Xu ◽  
Bo Fang Zhou ◽  
Quan Xiang Luo ◽  
You Liang Zeng ◽  
Chang Hua Du
Keyword(s):  
Tensile Strength ◽  
Oxide Film ◽  
Weld Seam ◽  
Filler Metal ◽  
Filler Alloy ◽  
Resistance Heating ◽  
Melt Temperature ◽  
Micro Structures ◽  
Two Sides ◽  
Joining Process

The joining process of SiCp/A356 composites is investigated. The two substrates are heated up to the melt temperature of Zn27Al filler metal by a resistance heating plate. At the time, a stirrer is introduced into the liquid weld seam in order to mix filler metal and two sides of substrates into a single uniform joint. After stirring, specimens are sectioned for the analysis of macro- and micro-structures along the weld region. The research shows that two typical joint interfaces with oxide film and without one were found. So, oxide film on the substrate wasn’t completely disrupted during stirring brazing at 500°C.And, the tensile strength of joint is only 50MPa.

Semi-Solid State Joining of Aluminum Alloys under Nitrogen Shielding Gas

2014 ◽  
Vol 496-500 ◽  
pp. 92-95 ◽  
Author(s):  
Atsadawoot Geaowdee ◽  
Prapas Muangjunburee ◽  
Jessada Wannasin
Keyword(s):  
Tensile Strength ◽  
Aluminum Alloy ◽  
Solid State ◽  
Welding Speed ◽  
Weld Seam ◽  
Rotation Speed ◽  
Shielding Gas ◽  
Globular Structure ◽  
Semi Solid ◽  
Solid State Joining

The purpose of this research is to investigate the semi-solid state joining of SSM 356 aluminum alloy which welded at its semi-solid state by using oxygen - acetylene as a heat source. Then a stirrer was used to stir the weld seam. Joining was performed under nitrogen shielding gas. The parameters of this study were rotation speed at 1,110 and 1,320 rpm, welding speed at 120 and 160 mm/min, semi-solid state temperatures 575-590 and 590-610 oC. The results indicated that the weld's microstructure consisted of irregular globular structure. In addition, porosities were found at top of weld metal. The highest tensile strength and elongation were obtained from rotation speed at 1,110 rpm, welding speed at 120 mm/min and joining temperature at 575-590 oC.

scholarly journals Semisolid Compression Brazing of Al50Si Alloy Using Zn-Al-Cu Filler Metal Assisted by SiC Particles

2019 ◽  
Vol 2019 ◽  
pp. 1-10
Author(s):  
Jing Xiao ◽  
Shun Li ◽  
Shuxin Bai ◽  
Degan Xiong ◽  
Yu Tang
Keyword(s):  
Mechanical Properties ◽  
Oxide Film ◽  
Bonding Strength ◽  
Filler Metal ◽  
Strengthening Effect ◽  
Metal Interface ◽  
Sic Particles ◽  
Particle Layer ◽  
Dislocation Strengthening ◽  
Sic Particle

Semisolid compression brazing of Al50Si alloy using Zn-Al-Cu filler metal assisted by SiC particles coating has been developed. The effects of the size and concentration of SiC particles on the microstructure and mechanical properties of the joints were studied. By using 1 μm SiC particles and the concentration of SiC particles increased to 3 g/m2, oxide film on the surface of base metal was completely disrupted and a good bonding strength was obtained. As SiC concentration further increased to 4 g/m2, colonies of SiC particle with nonwetting areas of filler metal formed at the interface, resulting in a decrease in the bonding strength. By using 5 μm SiC particles, the bonding strength was enhanced as SiC concentration increased from 1 g/m2 to 3 g/m2 due to the removal of the oxide film. By further increasing SiC concentration to 16 g/m2, the strength was constantly improved because of the dislocation strengthening effect generated at the SiC particle layer/filler metal interface. When SiC concentration increased to 32 g/m2, nonwetting area appeared inside the SiC particles layer, causing a decrease in the bonding strength.

scholarly journals Effect of process parameters on longitudinal weld seam quality of aluminum alloy profile for an automobile fuel tank protector

2020 ◽  
Vol 50 ◽  
pp. 159-167
Author(s):  
Wenlin Chen ◽  
Chen Xu ◽  
Penglin Pan ◽  
Xiangming Ruan ◽  
Hongxuan Ji
Keyword(s):  
Aluminum Alloy ◽  
Process Parameters ◽  
Weld Seam ◽  
Fuel Tank ◽  
Longitudinal Weld Seam

Microstructure of semi-solid ADC12 aluminum alloy adopting new SIMA method

2010 ◽  
Vol 20 ◽  
pp. s744-s748 ◽  
Author(s):  
Zhen-yu WANG ◽  
Ze-sheng JI ◽  
Li-xin SUN ◽  
Hong-yu XU
Keyword(s):  
Aluminum Alloy ◽  
Semi Solid

Enhanced strength-ductility synergy in a rheo-diecasting semi-solid aluminum alloy

2021 ◽  
pp. 130756
Author(s):  
Yan Liu ◽  
Xiaolin Chen ◽  
Minqiang Gao ◽  
Renguo Guan
Keyword(s):  
Aluminum Alloy ◽  
Solid Aluminum ◽  
Semi Solid

Evaluation of Repair Welding Influence on GH3535 Superalloy Microstructure and Mechanical Properties

2016 ◽  
Author(s):  
Chaowen Li ◽  
Shuangjian Chen ◽  
Kun Yu ◽  
Zhijun Li
Keyword(s):  
Mechanical Properties ◽  
Arc Welding ◽  
Weld Seam ◽  
Filler Metal ◽  
Short Term ◽  
Weld Repair ◽  
Repair Welding ◽  
Gas Tungsten Arc ◽  
Rolled Plates ◽  
Carbide Precipitate

GH3535 supperalloy, whose grade of ASME is UNS N10003, is currently considered as a candidate material for solid-fuel and fluid-fuel molten salt reactor in china. During the development of procedures for welding GH3535 superalloy, consideration should always be given to the possibility that repair welding may be necessary. This paper presents weld repairs of GH3535 alloy rolled plates using gas tungsten arc welding with filler metal. The purpose of this work is to evaluate the low heat input process for weld repair of GH3535 alloy plates about the microstructure features and mechanical properties. The results demonstrated that sound joints without defects could be obtained after weld repairs. Due to repair thermal cycles on the original weld seam, the size of carbide precipitate became large, but repair welding is found to cause no decrease in short-term time-independent strength.

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