Effect of Liquid-Phase-Impact Diffusion Welding Parameters on the Strength of Welded Joints of Aluminum Matrix Composite SiCp/ZL101

2005 ◽  
Vol 297-300 ◽  
pp. 2790-2794
Author(s):  
Ji Tai Niu ◽  
Wei Guo ◽  
Jin Fan Zhai ◽  
Mu Zhen Wang
Keyword(s):  
Liquid Phase ◽  
Matrix Composite ◽  
Aluminum Matrix ◽  
Aluminum Matrix Composite ◽  
Diffusion Welding ◽  
Welding Parameters ◽  
Aluminum Matrix Composites ◽  
Matrix Composites ◽  
National Patent ◽  
Matrix Reinforcement

In this paper, a new method for welding aluminum matrix composites is mainly described. It is liquid-phase-impact (LPI) diffusion welding, which has gained China National Patent. The results show that by liquid-phase-impact diffusion welding, when the certain amount of liquid phase alloy appears, with effect of certain impact speed, the interface of matrix-reinforcement and reinforcement-reinforcement are joined perfectly. Because the welding time is very short, the harmful phase is avoided in welded area and bad effect on the interface between the aluminum matrix and reinforcement hasn’t caused, and the work efficiency has improved enormously. With the technique, particle reinforcement aluminum matrix composite SiCp/ZL101 has welded successfully, and joint strength is about 75% of the strength of composite (as-casted), deformation less than 3%.

Interface Behavior in Liquid Phase Impact Diffusion Welding of Aluminum Matrix Composite

2005 ◽  
Vol 502 ◽  
pp. 449-454 ◽  
Author(s):  
Ji Tai Niu ◽  
Wei Guo ◽  
Jin Fan Zhai ◽  
Jie Yu ◽  
Bao You Zhang
Keyword(s):  
Liquid Phase ◽  
Matrix Composite ◽  
Welded Joint ◽  
Aluminum Matrix ◽  
Interface State ◽  
Aluminum Matrix Composite ◽  
Diffusion Welding ◽  
Interface Behavior ◽  
Brittle Phase ◽  
Sic Particle

In this paper, the interface behavior in Liquid Phase Impact Diffusion Welding (LPIDW) of Aluminum Matrix Composite has been studied. Results show that by LPI diffusion welding, the interface state between reinforcement (SiC particle) and matrix is prominent, the harmful microstructure or brittle phase can be restrained from the welded joint. Moreover, dislocation density in both matrix and interface are higher than that of parent composite, the dislocation entwists each other intensively resulted in welding the composite successfully.

scholarly journals Manufacturing and Performance of Carbon Short Fiber Reinforced Composite Using Various Aluminum Matrix

2021 ◽  
Vol 5 (12) ◽  
pp. 307
Author(s):  
Yongbum Choi ◽  
Xuan Meng ◽  
Zhefeng Xu
Keyword(s):  
Tensile Strength ◽  
Carbon Fiber ◽  
Ultimate Tensile Strength ◽  
Matrix Composite ◽  
Aluminum Matrix ◽  
Short Fiber ◽  
Aluminum Matrix Composite ◽  
Aluminum Matrix Composites ◽  
Al Alloy ◽  
Matrix Composites

A new fabrication process without preform manufacturing has been developed for carbon short fiber (CSF) reinforced various aluminum matrix composites. And their mechanical and thermal properties were evaluated. Electroless Ni plating was conducted on the CSF for improving wettability between the carbon fiber (CF) and aluminum. It was confirmed that pores in Ni plated CSF/Al and Al alloy matrix composites prepared by applied pressure, 0.8 MPa, had some imperfect infiltration regions between the CF/CF and CF/matrix in all composites. However, pores size in the region between the CF/CF and CF/matrix to use the A336 matrix was about 1 µm. This size is smaller than that of other aluminum-based composites. Vickers hardness of Ni plated CSF/A1070, A356 alloy, and A336 alloy composites were higher as compared to matrix. However, the A1070 pure aluminum matrix composite had the highest hardness improvement. The Ultimate tensile strength of the A1070 and A356 aluminum matrix composite was increased due to carbon fiber compared to only aluminum, but the Ultimate tensile strength of the A336 aluminum matrix composite was rather lowered due to the highest content of Si precipitate and large size of Al3Ni compounds. The Thermal Conductivity of Ni plated CSF/A1070 composite has the highest value (167.1 W·m−1·K−1) as compared to composites.

INVESTIGATION ON MECHANICAL PROPERTIES AND MICROSTRUCTURE OF BORON NITRIDE NANOPARTICLE REINFORCED ALUMINUM-BASED COMPOSITES

2021 ◽  
Vol 16 (3) ◽  
pp. 112-123
Author(s):  
Mahmut Can Şenel ◽  
Mevlüt Gürbüz
Keyword(s):  
Compressive Strength ◽  
Boron Nitride ◽  
Mechanical Strength ◽  
Matrix Composite ◽  
Vickers Hardness ◽  
Aluminum Matrix ◽  
Aluminum Matrix Composite ◽  
Matrix Composites ◽  
Al Matrix Composites ◽  
Al Matrix

In the current work, nano boron nitride (BN) reinforced aluminum (Al) matrix composites with different BN amounts (0.5-2wt.%) were produced by the powder metallurgy(PM) route. This fabrication method consists of dispersing, filtering, mixing, drying, compaction, and sintering processes. The density, compressive strength, micro Vickers hardness, microstructure, and phase structures of Al-BN composites and pure Al were examined. The obtained results indicated that minimum porosity (3.2%), highest density (~2.61g/cm3), Vickers hardness (~50HV), and compressive strength (~168MPa) were obtained at 1%BN reinforced aluminum matrix composite. A tremendous enhancement in Vickers hardness and compressive strength of %1BN reinforced Al matrix composite was achieved as ~61% and ~110% compared to pure Al. Consequently, the mechanical strength of BN reinforced Al-based composites enhanced up to 1% nano boron nitride amount. Due to the clumping of BN nanoparticles, the mechanical strength decreased after this content.

scholarly journals Effect of Material and Process Variables on Characteristics of Nitridation-Induced Self-Formed Aluminum Matrix Composites—Part 2: Effect of Nitrogen Flow Rates and Processing Temperatures

Materials ◽  
2020 ◽  
Vol 13 (5) ◽  
pp. 1213
Author(s):  
Dae-Young Kim ◽  
Pil-Ryung Cha ◽  
Ho-Seok Nam ◽  
Hyun-Joo Choi ◽  
Kon-Bae Lee
Keyword(s):  
Matrix Composite ◽  
Flow Rate ◽  
Volume Fraction ◽  
Aluminum Matrix ◽  
Aluminum Matrix Composite ◽  
Aluminum Matrix Composites ◽  
Processing Temperature ◽  
Nitrogen Flow ◽  
Nitrogen Flow Rate ◽  
Flow Rates

The nitridation-induced self-formed aluminum matrix composite (NISFAC) process is based on the nitridation reaction, which can be significantly influenced by the characteristics of the starting materials (e.g., the chemical composition of the aluminum powder and the type, size, and volume fraction of the ceramic reinforcement) and the processing variables (e.g., process temperature and time, and flow rate of nitrogen gas). Since these variables do not independently affect the nitridation behavior, a systematic study is necessary to examine the combined effect of these variables upon nitridation. In this second part of our two-part report, we examine the effect of nitrogen flow rates and processing temperatures upon the degree of nitridation which, in turn, determines the amount of exothermic reaction and the amount of molten Al in the nitridation-induced self-formed aluminum matrix composite (NISFAC) process. When either the nitrogen flow rate or the set temperature was too low, high-quality composites were not obtained because the level of nitridation was insufficient to fill the powder voids with molten Al. Hence, since the filling of the voids in the powder bed by molten Al is essential to the NISFAC process, the conditions should be optimized by manipulating the nitrogen flow rate and processing temperature.

Research on Fabrication and Semisolid Processing of Semisolid Slurries of 7075 Aluminum Matrix Composites Reinforced with Nano-Sized SiC Particles

2016 ◽  
Vol 256 ◽  
pp. 81-87 ◽  
Author(s):  
Ju Fu Jiang ◽  
Ying Wang ◽  
Shou Jing Luo
Keyword(s):  
Acoustic Streaming ◽  
Aluminum Matrix ◽  
Aluminum Matrix Composite ◽  
Aluminum Matrix Composites ◽  
Semisolid Slurry ◽  
Matrix Composites ◽  
Good Surface ◽  
Sic Particles ◽  
The Matrix ◽  
Cylindrical Parts

Semisolid slurries of 7075 aluminum matrix composite reinforced with nano-sized SiC particles were fabricated by ultrasonic assisted semisolid stirring (UASS) method. Rheoforming and thixoforming of typical cylindrical parts were investigated. The results show that high-quality semisolid slurries with spheroidal solid grain of 38 µm were fabricated by UASS. The nano-sized SiC particles were dispersed uniformly due to transient cavitation and acoustic streaming of ultrasonic wave and high and controllable viscosity of semisolid slurry. Typical cylindrical composite parts with good surface quality and complete filling were rheoformed and thixoformed successfully. Ultimate tensile strength (UTS) of the rheoformed and thixoformed composite parts are enhanced due to addition of nano-sized SiC particles. However, elongation decreased as compared to those of the matrix parts. Maximum UTS of 550 MPa was achieved in the thixoformed composite part with T6 treatment. Increase of dislocation density around the reinforcement particles leads to improvement of the strength and wear resistance of the composite.

Study of the net shape diffusion welding mechanism of aluminum matrix composite SiCw/6061Al

2003 ◽  
Vol 10 (6) ◽  
pp. 505-513 ◽  
Author(s):  
Liming Liu ◽  
Guoli Liang ◽  
Zhao Jie ◽  
Yugang Miao
Keyword(s):  
Matrix Composite ◽  
Aluminum Matrix ◽  
Aluminum Matrix Composite ◽  
Diffusion Welding
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