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Development Of Nonmetallic Insulation For High Pressure And High Temperature Subsea Performance

Published: 2014
Authors: Lindsey Goodman and Eric Caldwell

As oil and gas extraction moves deeper and farther offshore, many technical challenges arise. Deeper wells are often produced with flowing wellhead temperatures in excess of 300°F (150°C), and equipment is subject to hydrostatic conditions nearing 5,000 psi (345 bar) hydrostatic pressure. Despite high temperatures of produced fluids, it is often necessary to insulate subsea production equipment and flow-lines to prevent blockages such as hydrates and waxes that can form during shutdowns.

Material Resources / Publications

Numerical Simulation On Optimization Of Center Segregation For 50Crmo Billet

Published: 2014
Authors: Xiangzhou Gao, Jingshe Li, Shufeng Yang

In order to improve the center segregation of 50CrMo billet, a three-dimensional numerical model for continuous casting process was established to investigate the influence law of process parameters on secondary dendrite arm spacing (SDAS) and equiaxed crystal ratio.

Material Resources / Publications

Metal Encapsulated Mmc Macrocomposites

Published: 2014
Authors: P. Karandikar, E. Klier, M. Watkins, Brandon McWilliams, and M. Aghajanian

Metal matrix composites (MMCs) combine the desirable characteristics of metals (ductility, thermal conductivity) and ceramics (high hardness, high stiffness, low thermal expansion). For many armor (multi-hit capability) and structural applications, ductility is very critical.

Material Resources / Publications

Corrosion Of A Boiler Tubes Under Refractory Concrete - A Case Study

Published: 2014
Authors: Manabendra Kumar Maity, Avtandil K Bairamov, Eissa Al-Zahrani

A package boiler of a utility plant in a petrochemical plant experienced premature corrosion and leakage in the water wall tubes resulting in an emergency shutdown.

Material Resources / Publications

Influence Of The Base Material On The Hydrogen Embrittlement Of A Nuclear Reactor Pressure Vessel

Published: 2014
Authors: J. Toribio, D. Vergara and M. Lorenzo

A hydrogen diffusion simulation through the wall of a nuclear reactor pressure vessel of the type WWER-440 is shown in this paper, using a numerical model of hydrogen diffusion assisted by stresses and strains. The nuclear reactor pressure vessel is composed by a bi-material of stainless steel, acting as a cladding material, and low carbon steel, acting as a base material.

Material Resources / Publications

Research And Application Of Numerical Simulation On Optimizing Of Ingot Casting Process

Published: 2014
Authors: ZHOU Tongjun, L IU Junzhan, LUO Hui

During ingot casting process, the parametric changes of molten steel pouring process often cause both ingot surface and internal quality defects.

Material Resources / Publications

Cleavage Fracture In Cold Rolled Steel Fasteners

Published: 2014
Authors: M.Darji,

A cleavage fracture is produced, usually at low temperature, under a condition of high triaxial stress-that is, at the root of the notch-or at a high deformation rate, as for example by impact loading.

Material Resources / Publications

Influence Of Small Deviations In Steel Chemical Composition On Hardenability

Published: 2014
Authors: Pavel Suchmann, Petr Martinek

Chemical composition of steels used for heavy-duty parts of car gearboxes is usually defined by technical standards, in which certain deviations from nominal composition are allowed. However practical experience shows that in many cases even such small deviations can significantly influence the steel's behaviour during hardening.

Material Resources / Publications

Effects Of Trace Elements On Microstructure And Thermal Properties Of Al-Zn-Cu Based Alloys Using Extrusion

Published: 2014
Authors: Yong-Ho Kim, Jung-Han Kim, Hyo-Sang Yoo, Jung-Won Choi and Hyeon-Taek Son

Thermal properties and microstructure of Al-4Zn-2Cu-x(x=2wt%Mg, 2wt%Sn, 0.7wt%Mg- 0.7wt%Sn-0.7wt%Ca) alloys on cast and extrusion have been investigated with extrusion temperature of 400 °C. Al-4Zn-2Cu alloy was composed of Al and Al2Cu phases. By adding Mg contents, Al2Mg3Zn3 phase was increased and Al2Cu phase was decreased respectively.

Material Resources / Publications

From “Grain Refiners” To “Aluminium Based In-Situ Composites” In Ternary Al-Ti-B System

Published: 2014
Authors: M. Chakraborty

There has been a considerable interest in the ternary Al-Ti-B system amongst the aluminium casting fraternity.

Material Resources / Publications

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