Paper open access related content influence of the mg 17 al. Yanthe effect of solution heat treatments on the microstructure and hardness of zk60 magnesium alloys prepared under lowfrequency alternating magnetic fields mater sci eng a, 559 20, pp. Further chapters focus on understanding precipitation processes of magnesium alloys, alloying behaviour of magnesium, and alloy design. Effects of heat treatment on microstructure and mechanical. Based on the hyperbolic sinusoidal equation that included an arrhenius term, a constitutive model of flow stress was established for the unidirectional solidification sheet of az31 magnesium alloy. How can properties be modified by post heat treatment. The microstructure, hardness and friction and wear behavior. Fundamentals of magnesium alloy metallurgy 1st edition.
The role of microstructure in localized corrosion of. Microstructure and corrosion resistance of az91hp magnesium alloy lingling guo, jumei zhang, yang zhang et al. Group ii alloys alloys that have an intermediate fr eezing range, that is, a freezing range of 50 to 110 c between the liquidus and the solidus curves. The effects of magnesium on the microstructure, mechanical properties and antistress relaxation properties of cunisi alloys have been investigated. Influence of aging on microstructure and mechanical. Mechanical properties, and degradation behavior of. Transmission electron microscopy shows that the microstructure of pure magnesium is characterized by a bi. Microstructure and properties of mgal binary alloys. Microstructure alloy with 12% al after cooling with the furnace fig. These are the beryllium coppers, silicon bronzes, silicon brass, and coppernickel alloys.
Microstructure alloy with 12 % al after cooling in the water fig. The examination of microstructure is one of the principal means of. The microstructure and mechanical properties of ascast mg10gd. Phasefield simulation of microstructure formation in technical magnesium alloys. Microstructure and mechanical properties of magnesium.
The article presents new findings on the influence of microstructural changes on corrosion behavior of magnesium alloy az91 in chloride solution, with a particular attention to the role of the. Microstructure and thermomechanical properties of magnesium. Pdf microstructure and tensile properties of the mg6zn. Because magnesium interacts with aluminum and silicon to form imcs and limited solid solutions, this investigation will use alsi alloy powder in the laser surface alloying of magnesium alloys. The aim of the research was to determine the effect of rare earths elements on the ascast microstructure of magnesium alloys. The main alloying element of magnesium alloys is aluminium.
Three binary alloys, mg1wt%al, mg1wt%y, and mg4wt%y were forward extruded to investigate the effect of the yttrium addition on the evolution of texture and microstructure of magnesium alloys during extrusion. How are metal alloys classified and how are they used. The high strengthtoweight ratio of magnesium alloys is usually a prime reason for considering these materials in engineering designs. Fsp results in remarkable homogeneous microstructure and grain refinement of the am60b magnesium alloy. Effect of magnesium on microstructure refinements and. Sral ratio is thought to be important to control the microstructure of mgalsr alloys. Pdf the influence of microstructure on the corrosion of. Microstructure and mechanical properties of aged and hot.
Microstructure and mechanical properties of mg6al magnesium. Introduction to magnesium alloys asm international. The dark regions are intermetallics like al 2 cu and al 2 cumg. Magnesium alloys and their applications wiley online books. Ascast microstructure and srcontaining phases of az31. Clausen d a department of materials science and engineering, the university of tennessee, knoxville, tn 37996, usa. In the present paper a research has been made on the effect of aging on the microstructure and mechanical properties of az80 and zk60 wrought magnesium alloys by virtue of optical microscope, electronic scanning microscope and mechanical testers. For experimental evaluation both commonly used alloys az 91, az 91 be, and the amz 40 and aj 62 alloys too were chosen that werent industrially processed in the czech republic yet. On the role of yttrium in microstructure evolution and. Figure 1 shows mechanical twinning in pure wrought magnesium 99. Am50 magnesium alloy allows highenergy absorption and elongation at high strength and has goodcastability.
Microstructure and properties of elektron 21 magnesium alloy. Effect of magnesium on strength and microstructure of aluminium copper magnesium alloy girisha. Metallography and microstructure of aluminum and alloys. Presently, the influence of al element on the properties of mgal alloys is not fully understood. Its softness makes it somewhat difficult to prepare but the alloy is not sensitive to problems that plague. The results of the researches make up a basis for the next investigations of magnesium alloys. Mechanical properties and microstructure of magnesiumaluminum based alloys containing strontium 1205.
Pdf microstructure and properties of elektron 21 magnesium. The ascast microstructure and srcontaining phases in the az31 magnesium alloys with different sr contents 0%, 0. Typically, it is used in automotive industry for steering wheels,dashboards and seat frames. The effects of forging on the microstructure and tensile. Magnesium is largely pres ent in solid solution in wrought alloys, but it appears as eutectic mgal, in increasing amounts in ascast ingots as the magnesium content in creases fig. Mg,al 2ca and a bulky ternary mgalsr phase in the ajc411 alloy were observed at grain boundaries fig. The effects of forging on the microstructure and tensile properties of magnesium alloys az31 and zk60 david poerschke case western reserve university, cleveland, oh, usa abstract magnesium alloys have gained considerable attention in the last fifteen years for application in. Generally speaking, magnesium alloys of the mgal type are used as structural materials, but their disadvantage lies in their low heat resistance. The results show that a proper level of re elements can obviously re.
Microstructure and mechanical properties of za104 0. Microstructure and mechanical properties of a magnesium. Microstructure and properties of casting magnesium alloys. Therefore, the effects of different amounts of al microstructure and properties of mgal binary alloys. Mechanical properties and microstructure of magnesium. Alloying and processing effects on the microstructure. The alloy was friction stir processed with rotation speed of 1600 rpm and three traverse speeds of 100 mmmin, 200 mmmin and 300mmmin. Results demonstrated that magnesium plays significant roles in refining the dendritic microstructure of the ascast ingot, accelerating the precipitation decomposition, improving the mechanical properties and increasing the antistress relaxation properties. The aim of the present study was to investigate the effect of heat treatment on microstructure and, consequently, on the hardness and tensile. Special attentions are paid to the mechanical properties, compounds and grain re. It is much easier in the case of hot chamber casting 2,3.
Optimized development for magnesium castings and casting processes increase in value by applying a closed process chain for the development of automotive magnesium castings pages. The effects of magnesium on the microstructure, mechanical p microalloying is an effective method to improve the comprehensive properties of copper alloys. The process, due to economic reasons, should provide for automatic delivery of a liquid material to a mould. Apr 14, 2012 compared to many other metals and alloys and many other materials, such as carbides, ceramics and sintered carbides, aluminum and its alloys are low in strength and hardness. In the same manner, magnesium forms increasing amounts of mgjsi, but the solubility of this phase is reduced so that a. Figure 4 illustrates the structure of the am60 alloy after. Microstructure and corrosion characteristics of laseralloyed.
Magnesium alloys with their weight saving advantage exhibit unique application potential in the automotive and aerospace industries. Magnesium alloys belong to the lightest structural alloys. All the compared materials were supplied by a czech manufacturer and tab. Microstructure and mechanical properties of a rare earth rich. High stiffnesstoweight, castability, machinability, and excellent damping are desirable properties of magnesium alloys that factor. What are some of the common fabrication techniques. It was found out that the cast magnesium alloys were characteristic of the. A large reduction rolling process was used to obtain complete dynamic recrystallization drx microstructures with fine recrystallization grains. Microstructure and mechanical properties of ultrafinegrained. Microstructure, texture, and residual stress in a friction stir processed az31b magnesium alloy w. The ascast alloy was subjected to solutionizing and aging heat treatments, in order to incorporate variation in morphology and distribution of.
Metallography of magnesium and its alloys pulised ueler a diision o illinois ool ors olume issue magnesium and its alloys, regardless of the processing procedures employed, are among the most difficult metallic specimens to prepare for microstructural examination. Differential scanning calorimetry revealed significant differences in melting. How do properties vary throughout a piece of material that has been quenched, for example. The relationship between the initial structure, casting parameters, phase composition, and mechanical properties in magnesium alloys will be.
Dunand department of materials science and engineering, northwestern uni6ersity, 2225north campus dri6e, e6anston, il 60208, usa received 14 december 1998. Oct 10, 2019 microalloying is an effective method to improve the comprehensive properties of copper alloys. Effect of magnesium on strength and microstructure of. Magnesium alloys are not only very attractive materials for. Microstructure alloy with 12 % al after cooling in the air fig. Cast al cu mg alloys have widely used in aircraft, aerospace, ships and boat making, industrial and architectural applications for their good mechanical properties, high strengthtoweight ratio. Pdf microstructure and corrosion characterization of. The effects of rare earth re elements y and nd on the microstructure and mechanical properties of mg6al magnesium alloy were investigated. Mechanical properties and microstructure of magnesiumaluminum. Aluminum is a soft, silvery metal with a facecentered cubic crystal structure, a hallmark of ductile metals. Microstructure features and corrosion performance will be investigated for a better understanding of alloying effects. The effect of the metallurgical processing of the alloys on the studied parameters was also investigated. Phasefield simulation of microstructure formation in.
The mechanism of grain refinement caused by strontium. Recrystallization microstructure prediction of a hotrolled. Magnesium alloys are of great potential to be used in the aerospace, military, biomedical devices and automotive industries because of their low. Microstructure of ae44 magnesium alloy before and after hot. This study documents the microstructural analysis and corrosion behavior of am50 alloys squeeze cast at different. Microstructure and rheological properties of az91 and elektron 21 magnesium alloys in semisolid state were studied. Squeeze casting of magnesium alloys potentially can be used in lightweight chassis components such as control arms and knuckles. The impact of homogenization treatment on microstructure microhardness and corrosion behavior of wrought az80 magnesium alloys in 3.
Group iii alloys alloys that have a wide freezing range. These properties were evaluated on samples of alloys prepared by gravity casting in metallic moulds. Microstructure, mechanical properties, cyclic plastic deformation behavior and fatigue strength of ultrafinegrained ufg magnesium alloy az91 processed by equal channel angular pressing ecap were investigated. Results demonstrated that magnesium plays significant roles in refining the dendritic microstructure of the ascast ingot, accelerating the.
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