Results 11 to 20 of about 270,247 (224)

Effect of cross-sectional area reduction rate and alloy composition on the formation of <001>-fiber texture in Ti-Mo-Al-Zr alloy wire [PDF]

open access: yesMATEC Web of Conferences, 2020
Texture formation in Ti-7Mo-8Al-6Zr cold-groove-rolled alloy wires was investigated and compared to that of Ti-5.5Mo-8Al-6Zr. Irregularly textured -fiber was formed in Ti-5.5Mo-8Al-6Zr.
Shinohara Yuri   +4 more
doaj   +1 more source

The theoretical and experimental analysis of the possibility of employing the groove rolling process for the manufacture of Mg/Al bimetallic bars [PDF]

open access: yesMetalurgija, 2016
The paper presents the results of investigation into the possibility of employing the groove rolling process to produce round Mg/Al bimetallic bars. The feedstock were round 22,5 mm Mg/Al bars that had been produced using the explosive welding method ...
S. Mróz , P. Szota, A. Stefanik
doaj   +1 more source

Characterization of Microscopic Damage Evolution of Functional Groove in Cageless Bearings

open access: yesMachines, 2023
Bearings with partial function grooves as cageless bearings related to magnetic floating bearing protection have characteristics, such as fast offsetting of the impact force caused by rotor fall, and they gradually become important parts of ultra clean ...
Enwen Zhou   +3 more
doaj   +1 more source

Profile Design of the Grooved Die and Rolling Force Prediction in the Cold Pilger Rolling Process

open access: yesApplied Sciences, 2021
The objective of this study was to design the die groove profile and predict the rolling force produced when employing the variable curvature rolls and mandrel for manufacturing seamless pipes using the cold pilger rolling process.
Sang-Kon Lee, Kyung-Hun Lee
doaj   +1 more source

Investigations for vibration and friction torque behaviors of thrust ball bearing with self-driven textured guiding surface

open access: yesFriction, 2022
In order to improve the starved lubrication condition of rolling bearings, three kinds of textures, namely dimple, groove texture, and gradient groove texture, were developed on the guiding surface of thrust ball bearings in this study.
Can Wu   +5 more
doaj   +1 more source

Nonlinear Dynamic Characteristics of Deep Groove Ball Bearings with an Improved Contact Model

open access: yesMachines, 2023
In this paper, the nonlinear dynamic response of deep groove ball bearings with clearance was studied numerically. The imperfect connections with the clearance of raceways and rolling balls were established by the contact elements.
Wentao Shan   +5 more
doaj   +1 more source

Prediction of Surface Wrinkle Defect of Welding Wire Steel ER70S-6 in Hot Bar Rolling Process Using Finite Element Method and Experiments

open access: yesMetals, 2020
High quality products are demanded due to increasingly fierce market competition. In this paper, the generation of surface wrinkle defect of welding wire steel ER70S-6 was studied by the combination of the experimental method and finite element ...
Qian Liu   +5 more
doaj   +1 more source

Failure analysis of the rolls with grooves

open access: yesEngineering Power : Bulletin of the Croatian Academy of Engineering, 2007
he failure analysis of the rolls with grooves on the 3-high-roughing mill stand for hot rolling is presented. Detailed analysis of all the elements which influenced the failure was carried out, namely: the position and the place of all failures are determined and all fracture surfaces are described; the rolling forces are determined by analytical and ...
Domazet, Željko   +2 more
openaire   +5 more sources

Almost rolling motion: An investigation of rolling grooved cylinders [PDF]

open access: yesAmerican Journal of Physics, 1998
We examine the dynamics of cylinders that are grooved to form N teeth for rolling motion down an inclined plane. The grooved cylinders are experimentally found to reach a terminal velocity. This result can be explained by the inclusion of inelastic processes which occur whenever a tooth hits the surface.
Mead, Lawrence R., Bentrem, Frank W.
openaire   +2 more sources

Groove Rolling Process of Mg/Al Bimetallic Bars [PDF]

open access: yesArchives of Metallurgy and Materials, 2019
The paper presents the results of the experimental tests of Mg/Al bimetallic bars rolling process in classic and multi-radial modified round-oval-round passes.
S. Mróz, A. Stefanik, P. Szota
doaj   +1 more source

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