Development of lean titaniumalloyed aluminium alloy for electrotechnical purposes
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The influence of titanium amount and pouring temperature on the structure and properties of lean-alloyed alloy was explored. It was determined that lean titanium-alloyed aluminum alloys have better mechanical and electrical properties, which is explained by formation of heat-resistant dispersoids in solid solution. It was found that an increase in the amount of titanium by more than 0.5–0.6 % has a negative influence on electrical properties of the aluminium-based alloy. It was revealed that formation of four types of phases in complex-alloyed Fe and Si alloys contribute to preservation of tensile strength.The results of comparative studies of ingots and wires from experimental and mass-produced alloys were given. Results of experimental research on determining the modes and parameters of deformation and thermal treatment and their influence on mechanical and electrical properties of aluminum alloys were presented. They made it possible to develop the technology of production of lean titanium-alloyed aluminium-based alloy and rolling electrical products from it. During its implementation it was found that aluminum ingots, cold-treated sheets and wires, retain the necessary strength and minimal specific electrical resistance at high enough temperatures. A positive effect of cold deformation and intermediate annealing on formation of the rational structure and a good combination of electrical and mechanical properties of the products was revealedKeywords:
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Abstract This article introduces the different types, distinctions, and grades of commercially pure titanium and titanium alloys. It describes three types of alloying elements: alpha stabilizers, beta stabilizers, and neutral additions. The article discusses the basic categories of titanium alloys, namely, alpha and near-alpha titanium alloys, beta and near-beta titanium alloys, and alpha-beta titanium alloys. It also describes the general microstructural features of titanium alloys.
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This chapter contains sections titled: Physical and General Properties of Aluminum Cast Aluminum Alloys Wrought Aluminum Alloys Aluminum Powders and Aluminum Matrix Composites Use of Cast Aluminum Alloys Use of Wrought Aluminum Alloys Resistance of Aluminum Alloys to Atmospheric Corrosion Factors Affecting Atmospheric Corrosion of Aluminum Alloys Water Corrosion Seawater Soil Corrosion Some Aggressive Media: Acid and Alkaline Solutions Dry and Aqueous Organic Compounds Gases Mercury Corrosion Performance of Alloys Aluminum High-Temperature Corrosion References
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Abstract : This represents a second edition of an earlier handbook bearing the same title and the designation SST 65-8, dated August, 1965. The handbook represents a collection of data from many sources on the properties and fabrication characteristics of commercially pure titanium and eight titanium alloys including Ti-5Al-2.5Sn, Ti-8Al-1Mo-1V, Ti-6Al-4V, Ti-6Al-6V-2SN, Ti-13V- 11Cr-3Al, Ti-4Al-3Mo-1V, Ti-2.25Al-11Sn-5Zr-1Mo-0.2Si and Ti-6Al-2Sn-4Zr-2Mo. Section 1 describes the metallurgical characteristics of titanium and these alloys. Sections 2, 3, and 4 concern themselves with the availability of mill products, machining, and joining technology, respectively. Section 5 treats the subject of mechanical properties for these materials in a manner patterned after MIL-Handbook 5.
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Titanium alloys are highly adaptive to the manufacture of military, aircraft and medical devices due to their high tensile strength and toughness. However, the traditional processing path of titanium alloys are difficult and costly, which restricted the wide applications of titanium alloys. Additive manufacture has provided new processing routings for titanium alloys, with which high qualified components can be produced efficiently. Selective laser melting and laser metal deposition are two frequently used processing routings for additive manufacture of titanium alloys; while the former is powder bed based and can be used to produce fine components, the latter is powder feeding based and can be utilised to produce large components. With different forming mechanisms, the processing routings exhibit different characteristics in forming capacities, surface roughness, inner microstructures and mechanical properties, during their applications on titanium alloys. The development, characteristics and the applications of these two techniques in titanium alloys are reviewed, and the future developments of laser additive manufacture of titanium alloys are also discussed.
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The influence of annealing technology on microstructure and mechanical properties of 1100-H24 aluminum alloy sheet has been investigated by multi-factors optimizing method.The results show that the mechanical properties of 1100-H24 aluminum alloy sheet(1.6 mm × 1220 mm) can meet the requirement of the market after annealing treatment at reasonable annealing temperature with reasonable holding time and proper chemical composition controlling.
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6063 aluminium alloy
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Aluminium alloy inclusions
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The effects of strengthened diffusion annealing (to prolong the time of diffusion annealing in a great extent and to increase a little temperature of diffusion annealing)on casting mechanical properties and microstructure of 7B04 aluminum alloy were studied.The results show that the elongation of 7B04 alloy in strengthened diffusion annealing is higher 14% than one of 7B04 alloy in usual diffusion annealing,the casting microstruture of the alloy is improved and the muti-phase macrostructure of non-balance crystallization transform basically to uniform microstruture,which is beneficial to the plastic deformation and the heat treatment during the succeeding processes.
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The microstructure and properties of aluminum alloy cable with different homogenizing annealing process were studied. The results show that the microstructure and properties of aluminum alloy are improved by homogenizing annealing at450 ℃ due to non-equilibrium phase solid solution gradually. The optimum homogenizing annealing process of cable with aluminum alloy is keeping the alloys annealed at 450 ℃for 24 h.
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