Results 71 to 80 of about 484,215 (304)

Jamming transition in emulsions and granular materials

, 2005
We investigate the jamming transition in packings of emulsions and granular materials via molecular dynamics simulations. The emulsion model is composed of frictionless droplets interacting via nonlinear normal forces obtained using experimental data ...
C. F. Moukarzel, C. S. O’Hern, H. A. Makse, H. A. Makse, H. P. Zhang, J. Kurchan, K. L. Johnson, L. D. Landau, P. A. Cundall, R. D. Mindlin, S. F. Edwards, V. Trappe   +11 more
core   +1 more source

Effect of Oxygen Content on Surface and Subsurface Integrity During Turning of Ti–6Al–4V

Advanced Engineering Materials, EarlyView.
This study examines how oxygen content in the ambient atmosphere affects the surface and subsurface properties of Ti–6Al–4V during turning. Results show that oxygen does not influence surface roughness. However, machining in an extremely high vacuum‐adequate atmosphere increases surface hardness by up to 7.8% and induces compressive residual stresses ...
Benjamin Bergmann, Berend Denkena, Hilke Petersen, Florian Schaper   +3 more
wiley   +1 more source

Novel high specific-strength multi-topology Al-Ni-Ti-Zr-Mn alloy using laser powder bed fusion additive manufacturing

Additive Manufacturing Letters
Additive manufacturing has opened a paradigm for the efficient and quick production of lightweight lattice structures showing characteristic high specific strength (strength-to-weight ratios).
Amit Kumar Singh, Prithvi D. Awasthi, Ankita Roy, Priyanka Agrawal, Aishani Sharma, Anurag Gumaste, Ravi Sankar Haridas, Rajiv S. Mishra   +7 more
doaj   +1 more source

Tribomaterial factors in space mechanism brake performance [PDF]

The asbestos/phenolic pads of Shuttle Remote Manipulator System (SRMS) brakes are unsuitable for use in long life space mechanisms because their friction decreases on extended sliding in high vacuum.
Hawthorne, H. M.
core   +1 more source

On the Influence of Antioxidants and Recycled MgO–C Source Material on the Mechanical Properties of Carbon‐Bonded Magnesia Refractories

Advanced Engineering Materials, EarlyView.
The presented study focuses on the fracture behaviour of carbon‐bonded magnesia MgO–C refractories, where environmentally friendly fructose, collagen and lignin serve as temporary binding agents. The partial substitution of the source material with recycled MgO–C reduces the fracture resistance, which can be counteracted by the additional introduction ...
Marc Neumann, Tom Weber, Jana Hubálková, Florian Kerber, Dinesh Kumar Gunasekar, Hans Jelitto, Christos G. Aneziris   +6 more
wiley   +1 more source

Macro and micro structural responses of dissimilar TC4/TC17 titanium alloy joints in linear friction welding and post-welding heat treatment processes and their effects on tensile and fatigue performance

Journal of Materials Research and Technology
The heterogeneous TC4 (Ti–6Al–4V)/TC17 (Ti–5Al–2Sn–2Zr–4Mo–4Cr) joint, formed by linear friction welding (LFW) and post-weld treatment, shows significant potential for blisk manufacturing in aircraft engines.
Jiatao Liu, Jinglong Li, Feng Jin, Da Zhang, Wei Guo, Jiangtao Xiong   +5 more
doaj   +1 more source

Four‐Point Bending Tests at High Temperatures on Commercial MgO‐C Refractory Bricks with and Without Recyclate Considering Different Carbon Contents

Advanced Engineering Materials, EarlyView.
Four‐point bending tests are conducted in an argon atmosphere on commercial MgO‐C brick grades with and without MgO‐C recyclate from room temperature up to 1300 °C. No detrimental effect of the MgO‐C recyclates on bending strength is found. Instead, a decisive influence of the total carbon content is observed, with lower total carbon contents ...
Alexander Schramm, Lukas Knöchel, Thomas Schemmel, Christos G. Aneziris, Anja Weidner, Horst Biermann   +5 more
wiley   +1 more source

Experimental study of anti-clogging nozzle in cold sprayed pure aluminum：from coating to additive manufacturing

Cailiao gongcheng
The improved process combining a polybenzimidazole （PBI） polymer nozzle with axial center powder feeding is employed to study the nozzle clogging behavior and its impact on coating deposition.
HUANG Chunjie, HE Sanrun, WAN Wenpeng, WICK Filip, WIEHLER Levke, GÄRTNER Frank, KLASSEN Thomas, LI Wenya   +7 more
doaj   +1 more source

Sliding Seal Materials for Adiabatic Engines, Phase 2 [PDF]

An essential task in the development of the heavy-duty adiabatic diesel engine is identification and improvements of reliable, low-friction piston seal materials. In the present study, the sliding friction coefficients and wear rates of promising carbide,
Lankford, J., Wei, W.
core   +1 more source

Maximum Angle of Stability of a Wet Granular Pile

, 2005
Anyone who has built a sandcastle recognizes that the addition of liquid to granular materials increases their stability. However, measurements of this increased stability often conflict with theory and with each other [1-7].
A Samadani, Arshad Kudrolli, Azadeh Samadani, D Hornbaker, G Lian, N Fraysse, P Tegzes, R Albert, RM Nedderman, Sarah Nowak, SC du Pont, ST Nase, T Groger, TC Halsey   +13 more
core   +1 more source