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Rozprawy doktorskie na temat „AZ80 magnesium alloy”

Autor: Grafiati
Data publikacji: 6 września 2023
Data aktualizacji: 7 września 2023

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Sprawdź 23 najlepszych rozpraw doktorskich naukowych na temat „AZ80 magnesium alloy”.

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1

Tomlinson, Philip S. "Multiaxial deformation of AZ80 magnesium alloy." Thesis, University of British Columbia, 2013. http://hdl.handle.net/2429/45362.

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The multiaxial deformation of magnesium alloys is important for developing reliable, robust models for both the forming of components and also analysis of in service performance of structures, for example, in the case of crash worthiness. This work presents a combination of unique biaxial experimental tests and biaxial crystal plasticity simulations using a visco-plastic self-consistent (VPSC) formulation conducted on AZ80 magnesium alloy in two different conditions - extruded and a more weakly textured as cast condition. The experiments were conducted on tubular samples which are loaded in ax
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Alsubaie, Saad A. "Severely plastically deformed AZ80 magnesium alloy : microstructure and mechanical properties." Thesis, University of Southampton, 2017. https://eprints.soton.ac.uk/415954/.

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In this study the evolution of microstructure and the mechanical properties of an AZ80 magnesium alloy were investigated. It examined prepared samples of AZ80 magnesium alloy before and after processing by severe plastic deformation (SPD) using the High-Pressure Torsion (HPT) technique. An AZ80 magnesium alloy with a chemical composition of Mg-8.7% Al-0.5% Zn was processed using HPT. The processing was conducted at room temperature, 296 K, and at the elevated temperature of 473 K under quasi-constrained conditions, using an imposed pressure of 6.0 GPa at a speed of one revolution per minute (r
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Mackie, David. "Characterisation of casting defects in DC cast magnesium alloys." Thesis, University of Manchester, 2014. https://www.research.manchester.ac.uk/portal/en/theses/characterisation-of-casting-defects-in-dc-cast-magnesium-alloys(427257fa-04b3-46a3-9128-d21a79f3078a).html.

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The continued interest in the use of magnesium alloys for new applications demand the successful production of high quality wrought alloys. Magnesium Elektron seek to reliably produce high quality alloy billets by the DC casting method combined with ultrasonic inspection. The main objectives of this study are to characterize the defects which are currently found in the material and to understand the ability of the ultrasonic inspection technique currently employed to detect the defects. This study began by locating defects using the ultrasonic inspection method which were then characterised us
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Shahzad, Muhammad. "Influence of extrusion parameters on microstructure development and mechanical properties in wrought magnesium alloys AZ80 and ZK60." Clausthal-Zellerfeld Universitätsbibliothek Clausthal, 2010. http://d-nb.info/1003546358/34.

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Shahzad, Muhammad [Verfasser]. "Influence of extrusion parameters on microstructure development and mechanical properties in wrought magnesium alloys AZ80 and ZK60 / Muhammad Shahzad." Clausthal-Zellerfeld : Universitätsbibliothek Clausthal, 2010. http://d-nb.info/1003546358/34.

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Zindal, Anuz. "Development of grain boundary precipitate free zone(pfz) and its effect on mechanical properties of a Mg-8Al-0.5Zn alloy." Thesis, 2018. http://localhost:8080/xmlui/handle/12345678/7581.

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Ciou, Ren-Jhih, and 邱仁志. "Hot Extrusion of AZ80 Magnesium Alloy Tube and Bar." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/47qhgt.

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碩士<br>國立臺灣科技大學<br>機械工程系<br>95<br>The study mainly investigates into the formability of AZ80 magnesium alloy tube and bar under hot extrusion. The contents of investigation are divided into two parts. The first part is the extrusion of tube. By using Taguchi’s experimental planning method, the study undergoes the construction and analysis of extrusion experiment. The process parameters considered in the study include the heating temperature of materials,initial extrusion speed, heating temperature of ingot container and lubricant. The study also uses Taguchi orthogonal array to make the experi
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Lai, Wei-Jen, and 賴威任. "Study of Precipitation Hardening and Superplasticity of AZ80 Magnesium Alloy." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/23042499467093135086.

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碩士<br>國立臺灣大學<br>材料科學與工程學研究所<br>96<br>This study mainly focuses on precipitation hardening behavior and superplasticity of AZ80 magnesium alloy. The precipitation hardening experiment was conducted between 125-300℃. The influence of the precipitate on mechanical properties was measured by microhardness test and tensile test. The precipitate was investigated in detail by XRD, OM, SEM and TEM. The superplastic experiment focuses on three different rolling directions. The temperature ranges from 200-400℃ and the strain rates were 3×10-3、1×10-3 and 3×10-4(s-1). The results were analyzed by OM and S
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Lai, Wei-Jen. "Study of Precipitation Hardening and Superplasticity of AZ80 Magnesium Alloy." 2008. http://www.cetd.com.tw/ec/thesisdetail.aspx?etdun=U0001-2207200816174700.

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Lin, Hung-Ting, and 林泓霆. "A Study of Aging Treatment on AZ80+3%Li Magnesium Alloy." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/06905800175256844039.

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碩士<br>國立臺灣大學<br>材料科學與工程學研究所<br>99<br>Magnesium alloys are considered as potential candidates for numerous applications, especially in transportation vehicles or lightweight sectors for 3C products owing to their excellent properties, such as low density, high specific strength, high damping capacity and high recycle ability. The AZ series is mainly based on the Mg-Al alloy system and leads most of the magnesium alloys. If the Al addition in these AZ-series magnesium alloys exceeds 6 mass%, the β-Mg17Al12 inter-metallic compounds will precipitate within the matrix and the mechanical strength in
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Cheng-WenChou and 周正文. "Impact Deformation and Microstructural Evolution of AZ80 Magnesium Alloy under Various Temperatures." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/06560138791775885563.

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碩士<br>國立成功大學<br>機械工程學系<br>102<br>In this study, a spit-Hopkinson bar is utilized to investigate the effect of temperature and strain rate on impact response and microstructural characteristics of AZ80 magnesium alloy at different temperatures of -100℃, 25℃and 300℃, under strain rates of 800s-1,1500s-1 and 2200s-1, respectively. The experimental results indicate that the mechanical properties are related to temperature and strain rate. At a constant temperature, flow stress, work hardening rate, strain rate sensitivity and temperature sensitivity all increase with the increasing strain rate, wh
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Lee, Ya-Ju, and 李雅茹. "Effect of Cold-Spray Treatment on Surface Properties of AZ80 Magnesium Alloy." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/32726028278919498101.

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碩士<br>國立臺灣大學<br>材料科學與工程學研究所<br>100<br>It is commonly recognized that magnesium possesses poor corrosion resistance because of its high oxidation potential and porous oxide structure. The corrosion resistance is the most important topic for magnesium alloys application. The thesis aims to investigate how cold spray influences the properties of magnesium alloy, including microstructure, mechanical and corrosion property. The sprayed substrate is AZ80 magnesium alloy. IN625, 301 stainless steel and aluminum powder is used to spraying on the surface. In the study, the coating formed by cold spray
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Lin, Chien-Hung, and 林建宏. "Study of Friction Stir Spot Welding of High Strength Automotive AZ80-F Magnesium alloy." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/58296672896324093357.

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碩士<br>國立屏東科技大學<br>車輛工程系所<br>98<br>Lightweighting has become a key issue in automotive industries recently. Magnesium alloy, consequently, has become one of the major materials for structures. In addition, the solid-state bonding and other excellent features of the friction stir spot welding (FSSW) makes it inherently attractive for body assembly and other similar applications. This study aims to investigate the welding characteristics of the AZ80-F magnesium alloy of FSSW. A 3D finite element coupling model is employed to investigate the effects of welding parameters on the thermal-mechanical
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Lin, Yueh-Shien, and 林岳賢. "Study of back-pressure on microstructure of AZ80 magnesium alloy in equal channel angular extrusion." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/56063984408097369964.

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碩士<br>國立交通大學<br>機械工程系所<br>97<br>Severe Plastic Deformation (SPD) is widely used to improve the mechanical properties of magnesium. The equal channel angular extrusion (ECAE) is the most simple and convenient technique in SPD. By using ECAE, we obtain a product which has the same cross section with original billet after extrusion .In addition, the force required in extrusion during ECAE process is usually not large, and we can control the microstructure of the billet by changing the die parameters. Our experiments show that low temperature extrusion can achieve in grain refinement, but the lowe
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Li, Jun-Yi, and 李俊億. "Study on the effects of annealing on the microstructure and mechanical properties of AZ80 magnesium alloy." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/55380604107316620045.

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Wang, Si-Han, and 王思涵. "The Improvement of Corrosion Resistance and Osteoblastic Cell Responses on Biodegradable AZ80 Magnesium Alloy with a Hydrothermally Synthesized Fluorine-substituted Calcium Phosphate Coating." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/xew5sa.

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碩士<br>國立虎尾科技大學<br>材料科學與綠色能源工程研究所<br>103<br>Lightweight magnesium (Mg) alloys have a low elastic modulus, which value very close to the human bone. Biodegradable Mg alloys can be used for medical hard tissue implants in orthopedic applications without revision surgery. However, Mg alloys are notably characterized by low corrosion resistance in physiological solutions. On the basis of the excellent biocompatibility, bioactive and osteoconductive properties of fluorohydroxyapatite (FHA), a FHA surface coating was hydrothermally synthesized on the AZ80 Mg alloy at 175ºC under a saturated steam pre
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Tsai, Wen-Li, and 蔡文力. "Studies on Damping Capacities of AZ80 and LAZ1110 Magnesium Alloys." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/69607213413593841404.

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碩士<br>國立臺灣大學<br>材料科學與工程學研究所<br>97<br>Damping capacities (DCs) of AZ80 and LAZ1110 magnesium alloys are investigated by Dynamic Mechanical Analyzer (DMA) at the temperature range of 0-300℃. DC of the high-temperature damping background (HTDB) at 200-300℃ for AZ80 alloy increases significantly after 20% cold-rolling with or without aging. However, the activation energy of HTDB decreases from 1.69eV to 1.37eV, which indicates cold-rolling can accelerate alloy’s diffusion process and promote its creep development simultaneously. Consequently, the contrary cold-rolling effect on DC and creep resist
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Yang, Tsung-yu, and 楊宗育. "Applicability of CO2 Laser on AZ61and AZ80 Extruded Magnesium Alloys Welding Research." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/49937519636368158526.

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碩士<br>國立臺灣科技大學<br>機械工程系<br>96<br>Investigation of CO2 laser welding has been done to AZ61 and AZ80 magnesium alloy extrusion sheet. Material without heat treatment has been compared with material which heat treated prior to welding. The aim of this research was to study the effect of different heat input of CO2 laser welding on mechanical properties, microstructure, chemical composition and welding defects of the magnesium alloy extrusion sheet in order to improve the weldability. Base metal and weld metal were observed with the scanning electron microscope. Energy dispersive X-ray spectro
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Tzeng, Shang-jie, and 曾勝杰. "A Study Characteristic on AZ80 Magnesium Alloys for TIG Welding and Heat Treatment." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/65413913167576818517.

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碩士<br>修平技術學院<br>精密機械與製造科技研究所<br>98<br>This study aimed to investigate the characteristics of AZ80 magnesium alloy by TIG welding for corresponding in the same voltage and current. Tempering heat treatment process by observation of AZ80 magnesium alloy and the mechanical properties change. The experimental results shown in by X-ray diffraction analysis showed that the welded magnesium alloy AZ80 after heat treatment have β-phase (Mg17Al12) precipitation, making AZ80 magnesium alloy in ?Mg matrix phase of the composition, microstructure in the fusion zone. The Microstructure observed after the h
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Li, Jijin, and 李季錦. "The Effect of Aging Precipitates on Mechanical Properties of AZ80A Magnesium Alloy." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/64640123955735531177.

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碩士<br>大葉大學<br>車輛工程學系碩士班<br>93<br>ABSTRACT Taiwan is one of the most important bicycle suppliers in the world. As a base of production, there must be a mastery of advantages of manufacturing technology. In the respect of the evolution of bicycle materials from early carbon steel, then aluminum alloy, then carbon fiber, and the current titanium alloy, it is apparent that the traders’ eager desire to find the stronger and lighter materials. Aluminum alloys still dominates the manufacturing of bicycles. The specific gravity of aluminum alloy is about 2.7 g/cm3 and the magnesium alloy is only
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kai, Fu guan, and 傅冠凱. "The Effect of Parameters to the Mechanical Properties on AZ80A Magnesium Alloy Resistance Spot Welds." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/82248631538625309510.

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Hsiao, Yu-Chi, and 蕭宇棋. "The Effect of Aging Precipitates to the Microstructure and Mechanical Properties on AZ80A Magnesium Alloy Welds." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/36943444455162257210.

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碩士<br>大葉大學<br>機械與自動化工程學系<br>97<br>The purpose of this study for extrusion AZ80A magnesium alloy welds carry out solid solution and aging treatment, and discussion the precipitates type and distribution to welds micro structure and mechanical property influence situation. The experiment uses the alternating current inert gas tungsten electrode arc welding (TIG) way plate welding. Use the temperature 420℃ solid solution treatment and to keep the temperature 1 hour, and then use the 200℃ temperature, the time set 4, 8, 12, 16, 20 hours to carry out the aging treatment. From the experimental r
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Ching, Lin Chia, and 林家慶. "The Effect of Pulse Current to the Micro Structure and Mechanical Properties on AZ80A Magnesium Alloy Welds." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/91987502062863491385.

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碩士<br>大葉大學<br>機械工程研究所碩士在職專班<br>93<br>ABSTRACT According to the high development of technology, consumer demands for product are changed from function-oriented to fine quality and light-weight behavior. Also the "Green concept" is highly emphasized in the worldwide. The vehicle industries are selecting light weight materials to fabricate the vehicle to reduce the exhaust gases emission and increase the fuel efficiency. As we know, magnesium alloy exist many excellent characteristics; ex: low specific density, high specific strength and rigidity, good thermal conductivity, high damping capacity
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