Alloy mechanisms

Magnesium casting alloys, mechanical properties of, 15 358-359t Magnesium castings, heat treatment of, 15 357-358. See also Magnesium die castings... 

Oxygen fluorides, 11 830 Oxygen-free copper wrought alloy, mechanical properties, 7 678t... 

Roll discharge systems, with rotary drum vacuum filters, 11 356-357 Rolled lead alloys, mechanical properties of, 14 775t... 

Key words high-strength aluminum alloys, dispersion hardening, quasicrystals, eutectic alloys, mechanical properties... 

R. C. Svedberg, R. L. Ammon, Oxidation resistant niobium alloy - Mechanically alloying niobium intermetallic and niobium alloy , US Patent 4,836,849,1989. 

Key words Refractory alloys, rhenium effect, Cr-Re alloys, mechanical properties, high temperature, oxidation resistance, thermal shock resistance. 

Some SRB may cause loealized corrosion on stainless steels, nickel alloys, aluminium, zinc and copper alloys. Mechanisms of sulphur-assisted corrosion, with emphasis on Fe- and Ni-based materials, have recently been reviewed by Marcus [6.17]. The review includes the fundamentals of enhanced dissolution, retarding or blocking of passivation, and passivity breakdown. 

Ino] Inoue, A., Harakawa, Y., Oguehi, M., Masumoto, T., Metastable MC Phase in Melt-Quenched C-Fe-V and Fe-C-V-(Cr or Mo) Alloys-Mechanical Properties and Powder-Forming Tendency by Comminution , J. Mater. Sci., 21, 1310-1320 (1986) (Crys. Structure, Morphology, Phase Relations, Experimental, Meehan. Prop., 16)... 

Online and off-line investigations are in progress to study the effects of fast neutrons in solids using fluences in the range 10 -10 /cm. Samples and physical properties to be studied are as follows metals and alloys (mechanical, microstructure, electrical resistivity), superconductors (critical current, temperature and field), and insulators (electrical and... 

The tunnel model, manufactured from 6063A aluminum alloy, is 100 mm wide and 220 mm long, having a thickness of 2 mm. The aluminum alloy mechanical... 

Pd-containing alloys mentioned above are solid solution strengthened and their application temperatures are usually limited to below 500°C. In order to establish a base line data for the development of high temperature creep resistant braze alloys, mechanical properties of thin foils of these alloys were evaluated. 82Au-18Ni was annealed at 850°C for 5 hours before tensile tests, whereas all other foils were treated at 900°C. 

Carbide precipitation hardening (in TZM, MHC) is effective up to 1400 °C. The addition of the deformable oxides La203 (in ML) and xKqO y Si02 (in K—Si—Mo), respectively, results in oxide refinement by deformation and in the possibility of tailoring the mechanical properties. This is the main alloying mechanism for Mo applied in lamps [1.119]. 

Ductility of one of the constituent powders is not a requirement for mechanical alloying to occur. A number of brittle/brittle systems have been shown to form solid solutions of intermetallic compounds during milling (Davis et al. 1988, Davis and Koch 1987). In contrast to the layered morphology exhibited by ductile systems, brittle/brittle systems develop a granular morphology. While the alloying mechanism is not well understood with brittle systems it is evident that material transfer between the components plays an important role (Davis et al. 1988). 

Non-metallic inclusions, such as AI2O3 particles, have a deleterious effect on the mechanical strength of steels and alloys mechanical strength decreasing with increases in both concentration and magnitude of the inclusions. Gas bubbling is often used to remove inclusions. The situation is shown in Figure 9. 

Pt-based alloys have been developed for many years to improve the catalytic activity of the oxygen reduction reaction and the methanol oxidation reaction, and reduce Pt loading in the catalyst layers of the PEM fuel cell cathode and anode. Great progress has been made in recent years in terms of alloy activity screening, alloy mechanism discovery, and alloy stability investigation. 

Properties (Source H.P. Thiimmler and R. ThuU, Stirface Properties of Titanium and Its Alloys—Mechanical and Electrochemical Investigation, in Tita-... 

Falvo A, Futgiuele FM, Maletta C (2005) Laser welding of a Nili alloy Mechanical and shape memory behavior. Materials Science and Engineering A. 412 235-240 Wu MH (2001) Fabrication of Nitinol materials and components. Proceedings of the international conference on shape memory and super-elastic technologies, Kunming, China, 285-292... 

Davidson, D.L., Lankford, J. Fatigue crack growth in metals and alloys. Mechanisms and Micromechanics, International Materials Review. 37, 45-76 (1992)... 

Surface states and surface alloying mechanisms [63] consider that the extent of surface reaction and measurement temperature determine the PL blueshift and the passivation effect varies with the processing parameters and aging conditions [64]. 

The properties of aluminum alloys (mechanical, physical, and chemical) depend on alloy composition and microstructure as determined by casting conditions and thermomechanical processing. While certain metals alloy with Al rather readily [9], comparatively few have sufficient solubility to serve as major alloying elements. Of the commonly used alloying elements, magnesium, zinc, copper, and silicon have significant solubility, while a number of additional elements (with less that 1% total solubility) are also used to confer important improvements to alloy properties. Such elements include manganese, chromium, zirconium, titanium, and scandium [2,10]. 

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