Rotary Application of Low Matrix Strength Impregnated and TSP Cutter Bits to Unayzah Sandstone Drilling

2002 ◽  
Author(s):  
M. A. Simpson ◽  
A.H. Roed ◽  
H.A. Al-Shammari ◽  
Dirk Hoekstra
Keyword(s):  
2014 ◽  
Vol 53 (2) ◽  
pp. 309-317 ◽  
Author(s):  
Ahmed M. Diab ◽  
Hafez E. Elyamany ◽  
Ali Hassan Ali

2006 ◽  
Vol 519-521 ◽  
pp. 1865-1870 ◽  
Author(s):  
Murat Tiryakioğlu

The effects of solution treatment time and artificial aging on the work hardening characteristics on Al-7%Si-0.6%Mg (D357) alloy castings were investigated. Four different solution treatment times at 540°C (1, 4, 16 and 64 hours) and six different artificial aging times at 160°C (0, 2.5, 5, 10, 20 and 40 hours) were used. Work hardening characteristics were investigated by Kocks-Mecking plots for each specimen. The effects of Si particle morphology (solution treatment) and matrix strength (aging) on Kocks-Mecking (Stage III) work hardening model parameters are discussed in the paper.


2011 ◽  
Vol 702-703 ◽  
pp. 766-769 ◽  
Author(s):  
A. Ray ◽  
Debalay Chakrabarti

Charpy impact testing (over the transition temperature rage) on different samples of a Ti-microalloyed steel, having the same average-TiN particle size but different average-ferrite grain sizes, showed that in spite of the presence of large TiN cuboides, ferrite grain refinement can significantly improve the impact toughness, provided the meso-texture (i.e. the intensity of low-angle boundaries) and matrix strength can be restricted to low values.


2002 ◽  
Vol 16 (4-5) ◽  
pp. 229-235 ◽  
Author(s):  
B van Veen ◽  
K van der Voort Maarschalk ◽  
G.K Bolhuis ◽  
M Gons ◽  
K Zuurman ◽  
...  

2008 ◽  
Vol 2008.21 (0) ◽  
pp. 680-681
Author(s):  
Masashi KUROSE ◽  
Yoshio FUKUSHIMA ◽  
Kazuya NAITO ◽  
Takuo SUZUKI

2010 ◽  
Vol 135 ◽  
pp. 355-360
Author(s):  
J.Q. Zhang ◽  
Zi Rui Pang ◽  
P. Guan ◽  
Wan Shan Wang ◽  
H.Z. Pi

It is different from the traditional integrated super high-speed grinding wheel, the centrifugal force has greater impact on segmented grinding wheel in super high-speed rotation. In this paper, in order to ensure the safety of super high-speed grinding wheel, models for the connection between inner micro-unit’s displacement and stress of wheel matrix were established to optimize high-speed grinding wheel section form, reduce the centrifugal stress and control the radial displacement of grinding wheel. Consider the structural and mechanical characteristics of wheel matrix, strength check of the theoretical formula were also established. Taking into account the factors of aerodynamic and wheel connector effects, at last the design of segmented super high-speed grinding matrix was optimized with finite element method.


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