scholarly journals 2D Finite Element Computer Analysis of Strength for Brazed Joint of Cemented Carbide and Silver Brazing Filler Metal

2016 ◽  
Vol 6 (4) ◽  
Author(s):  
Meribe Richard Chukwuma ◽  
Kazuya MORI ◽  
Kento Takenouchi ◽  
Yuki Fijishita ◽  
Takeshi Eguchi ◽  
...  
Keyword(s):  
Finite Element ◽  
Computer Analysis ◽  
Filler Metal ◽  
Cemented Carbide ◽  
Brazed Joint

Investigation on Wettability and Metallurgical and Mechanical Properties of Cemented Carbide and Steel Brazed Joint

2012 ◽  
Vol 445 ◽  
pp. 759-764 ◽  
Author(s):  
Seyed Ali Asghar Akbari Mousavi ◽  
P. Sherafati ◽  
M.M. Hoseinion
Keyword(s):  
Mechanical Properties ◽  
Contact Angle ◽  
Shear Strength ◽  
Filler Metal ◽  
Microscopic Investigation ◽  
Primary Phase ◽  
Cemented Carbide ◽  
Eutectic Microstructure ◽  
Brazed Joint ◽  
Filler Metals

In this study the wettability, microstructure and mechanical properties of joining between cemented carbide and CK35 steel which brazed with two filler metals, L-Ag40Cd and L-Ag34Cd, were investigated. Wettability test shows that with increase of brazing time, the contact angle decreases and the best situation was resulted in the 20 minute brazing. Microscopic investigation of the brazed area with both filler metal shows that there is a copper enriched primary phase and eutectic microstructure in the silver enriched matrix which composed of copper enriched particles. The amount and the dispersion of precipitates are depended upon type of filler metal and brazing temperature. The results show that brazing with L-Ag34Cd filler metal at 800 °C exhibit superior shear strength in the level of 108 MPa.

Corrosion Resistance Evaluation of a Stainless-Steel Brazed Joint in HCl Solution

2021 ◽  
Vol 1016 ◽  
pp. 997-1002
Author(s):  
Hikaru Nagata ◽  
Masa Ono ◽  
Yasuyuki Miyazawa ◽  
Yuji Hayashi ◽  
Yoshio Bizen
Keyword(s):  
Aqueous Solution ◽  
Stainless Steel ◽  
Corrosion Resistance ◽  
Base Metal ◽  
Corrosion Behavior ◽  
Anodic Polarization ◽  
Filler Metal ◽  
Brazed Joint ◽  
In Situ Observations

To clarify the effect of the acid solution type on corrosion resistance, the corrosion behavior of stainless steel brazed joints in HCl aqueous solution was evaluated through electrochemical measurements. Anodic polarization curves of a ferritic stainless-steel base metal, Ni-based brazing filler metals, and a brazed joint were recorded. In addition, in situ observations were conducted to observe the corrosion behavior of each structure of the brazed joint. Corrosion potentials of the brazing filler metal were lower than that of the base metal. In situ observations of the brazed joint revealed the order of corrosion in aqueous hydrochloric acid. According to the electrochemical measurements, under an actual corrosive environment, the brazing filler metal can function as an anode and selectively corrode. In addition, the anodic polarization curve of the brazed joint showed values between those of the polarization curves of the brazing filler metal and the base metal, indicating that the corrosion resistance could be electrochemically evaluated in HCl aqueous solution.

Investigation on hardness testing of cemented carbide tool based on finite element method

2020 ◽  
pp. 095440622097616
Author(s):  
Siyuan Gao ◽  
Minli Zheng ◽  
Jinguo Chen ◽  
Wei Zhang
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Traditional Method ◽  
Three Dimensional ◽  
Cemented Carbide ◽  
Carbide Tool ◽  
Indentation Method ◽  
Cemented Carbide Tool ◽  
Hardness Values ◽  
Element Method

Hardness is a critical mechanical property of cutting tools, which significantly affects the cutting performance and wear resistance. Therefore, it is of great significance to obtain the hardness of the tool surface accurately. This paper presents a method based on finite element method (FEM) for studying the hardness of carbide tools. The microstructure of the carbide tool is obtained by scanning electron microscope(SEM). Combined with stereo principle, and secondary treatment, a three-dimensional multi-crystal model of carbide tool and indentation is established, and the model and hardness value obtained by different calculation methods are verified by microhardness test. The results show that the real hardness of the cemented carbide tool can be obtained by the indentation FEM model. The hardness values of cemented carbide tools are then calculated by the traditional method, Oliver-Pharr (OP) method and indentation method, respectively. It is found that the hardness value of the traditional method is the largest and fluctuates greatly, while the hardness values calculated by the OP method and indentation method are similar, and the fluctuation range of the hardness value calculated by the OP method is larger. In conclusion, the hardness calculated by the indentation work method is the best.

The Numerical Simulation of Effective Elastic Response for WC-Co Cemented Carbide

2015 ◽  
Vol 1096 ◽  
pp. 417-421
Author(s):  
Pei Luan Li ◽  
Zi Qian Huang
Keyword(s):  
Numerical Simulation ◽  
Finite Element Method ◽  
Finite Element ◽  
Theoretical Model ◽  
Material Properties ◽  
Cemented Carbide ◽  
Elastic Response ◽  
The Finite Element Method ◽  
Simulation Results ◽  
Element Method

By the use of finite element method, this paper predicts the effects of the shapes of reinforcements with different ductility (Co) on the effective elastic response for WC-Co cemented carbide. This paper conducts a comparative study on the material properties obtained through theoretical model, numerical simulation and experimental observations. Simulation results indicate that the finite element method is more sophisticated than the theoretical prediction.

Effects of Inner Defects on Creep Damage and Crack Initiation for a Brazed Joint

2018 ◽  
Vol 37 (9-10) ◽  
pp. 863-872 ◽  
Author(s):  
Yun Luo ◽  
Chuanlong Wang ◽  
Wenchun Jiang ◽  
Yu Wan ◽  
Weiya Zhang ◽  
...  
Keyword(s):  
Crack Initiation ◽  
Filler Metal ◽  
Damage Model ◽  
Creep Damage ◽  
Area Ratio ◽  
Creep Crack ◽  
Metal Thickness ◽  
Incomplete Filling ◽  
Defect Area ◽  
Brazed Joint

AbstractIn the brazing process, some brazing defects like semicircular or straight type are generated due to incomplete filling. In this paper, the creep damage and creep crack initiation (CCI) time of Hastelloy C276-BNi2 brazed joint with defects are investigated by a ductility exhaustion damage model. The effects of defect dimension and filler metal thickness are also discussed. The results show that the different defects have different creep damage distributions and CCI times. The maximum creep damage is located at the defect frontier due to the larger stress concentration. With the increase of semicircular defect radius and straight defect length, the CCI time decreases. The creep fracture is inclined to generate in semicircular defect for the smaller defect area ratio, while it is easy to generate in straight defect for the bigger defect area ratio. As the filler metal thickness increases, the CCI time increases. For the thicker filler metal, the creep crack is easy to initiate in semicircular defect.

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