scholarly journals Study of Subsurface damage of tungsten alloy in rotary ultrasonic grinding

2021 ◽  
Vol 4 (4) ◽  
pp. 99-109
Author(s):  
Pacifique Turabimana ◽  
Emmanuel Karangwa
Keyword(s):  
Subsurface Damage ◽  
Tungsten Alloy ◽  
Ultrasonic Grinding

Subsurface damage detection of RB-SiC and its subsurface damage characteristics in rotating ultrasonic grinding

2017 ◽  
Vol 25 (10) ◽  
pp. 2714-2724
Author(s):  
秦 娜 QIN Na ◽  
郑 亮 ZHENG Liang ◽  
刘亚龙 LIU Ya-long ◽  
孔春雷 KONG Chun-lei
Keyword(s):  
Damage Detection ◽  
Subsurface Damage ◽  
Damage Characteristics ◽  
Ultrasonic Grinding

Experimental Study on the Subsurface Damage in the Ultrasonic Vibration Grinding of Nano-ZrO2 Ceramics

2010 ◽  
Vol 42 ◽  
pp. 143-146 ◽  
Author(s):  
Ming Li Zhao ◽  
Bo Zhao ◽  
Yu Qing Wang ◽  
Ling Zhi Kong
Keyword(s):  
Ultrasonic Vibration ◽  
Vibration Mode ◽  
Longitudinal Vibration ◽  
Subsurface Damage ◽  
Bending Vibration ◽  
Effect Factor ◽  
Damage Layer ◽  
Grinding Method ◽  
Ultrasonic Grinding ◽  
Longitudinal Vibration Mode

Because of the hard-brittle character of ceramics, the ultrasonic vibration grinding method was used in the experiment. And the effects of ultrasonic vibration on the subsurface damage were analyzed in this paper. The experiment indicates that the frequency of 35 KHz will be more suitable for ultrasonic grinding ceramics, and under this frequency the damage layer thickness will be controlled in 11μm. The effect of vibration amplitude on the subsurface damage was also analyzed in this paper. The experiment results show that smaller amplitude will impair the efficiency of ultrasonic vibration grinding. The ultrasonic vibration mode was also an effect factor to the subsurface damage. Only the longitudinal vibration mode can improve the subsurface quality, while the bending vibration and torsion vibration will lead to the contrary results.

Experimental Study on Damage Mechanism of Nano-Ceramic Surface/Subsurface under Ultrasonic Vibration Aided Grinding

2011 ◽  
Vol 175 ◽  
pp. 107-111 ◽  
Author(s):  
Bo Zhao ◽  
Chong Yang Zhao ◽  
Bao Yu Du
Keyword(s):  
Ultrasonic Vibration ◽  
Damage Mechanism ◽  
Subsurface Damage ◽  
Ceramic Surface ◽  
Processing Efficiency ◽  
Ultrasonic Grinding ◽  
Force Direction ◽  
Grinding Conditions ◽  
Loading And Unloading ◽  
Ultrasonic Vibration Assisted Grinding

In this paper, surface/subsurface damage mechanism of engineering ceramics under ultrasonic vibration assisted grinding was studied by experiment based on its theoretical study. The study shows: under the same grinding conditions, ultrasonic grinding can realize plastic grinding and low crack damage surface grinding in a larger range of cutting depth than that under common grinding, that can improve processing efficiency and reduce workpiece grinding damage. Meanwhile, ultrasonic vibration grinding process can be seen as periodical loading and unloading process of abrasive on the workpiece. Crack is formed and extends initially on loading, the speed of crack expansion slows down, and its direction offsets to workpiece free surface on unloading as the change of ultrasonic force direction. So cracks can not expand to material deep and shallow sub-surface cracks are left in workpiece sub-surface layer. This phenomenon may be one of the main reasons that subsurface damage is reduced on ultrasonic grinding.

Dynamic Tensile Behavior of 93wt.% Tungsten Alloy and its Fractal Features of Fracture

1997 ◽  
Vol 07 (C3) ◽  
pp. C3-409-C3-414
Author(s):  
B.-P. Zhang ◽  
C. Ding ◽  
B. Liu ◽  
T. Jiao ◽  
H. Lin ◽  
...  
Keyword(s):  
Tensile Behavior ◽  
Tungsten Alloy

STOODY 4

Alloy Digest ◽  
1977 ◽  
Vol 26 (4) ◽  
Keyword(s):  
Solid Solution ◽  
Compressive Strength ◽  
Corrosion Resistance ◽  
High Temperature ◽  
Physical Properties ◽  
Heat Treating ◽  
Tungsten Alloy ◽  
High Temperature Strength ◽  
Cobalt Chromium ◽  
Temperature Performance

Abstract STOODY 4 is a cobalt-chromium-tungsten alloy with excellent high-temperature strength and excellent resistance to corrosion. This alloy derives its high-temperature strength from the high tungsten-to-carbon ratio which allows a large percentage of tungsten to remain in solid solution. This datasheet provides information on composition, physical properties, hardness, elasticity, tensile properties, and compressive strength. It also includes information on high temperature performance and corrosion resistance as well as heat treating, machining, and joining. Filing Code: Co-75. Producer or source: WRAP Division, Stoody Company.

BÖHLER K107

Alloy Digest ◽  
2020 ◽  
Vol 69 (9) ◽  
Keyword(s):  
Wear Resistance ◽  
Physical Properties ◽  
Abrasive Wear ◽  
Cold Work ◽  
Heat Treating ◽  
Abrasive Wear Resistance ◽  
Tungsten Alloy ◽  
High Carbon ◽  
Cold Work Tool Steel ◽  
Very High

Abstract Böhler K107 is a high-carbon (2.1%), 12% chromium. 0.7 % tungsten, alloy cold-work tool steel that is used in applications where a very high abrasive wear resistance is needed, but where demands on chipping resistance are small. This datasheet provides information on composition, physical properties, hardness, and elasticity. It also includes information on forming and heat treating. Filing Code: TS-799. Producer or source: voestalpine Böhler Edelstahl GmbH&Co KG.

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