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Wednesday, August 5, 2020 | History

2 edition of Development of microstructure in cast magnesium alloys. found in the catalog.

Development of microstructure in cast magnesium alloys.

L.Y Wei

Development of microstructure in cast magnesium alloys.

by L.Y Wei

  • 133 Want to read
  • 14 Currently reading

Published by Chalmers Tekniska Hogskola in Goteborg .
Written in English


ID Numbers
Open LibraryOL20485285M

As cast AZ91D and AZ91D+10 wt-%Y magnesium alloy were prepared by the lost foam casting process and then treated by solution and aging treatment. The effects of Y on the microstructure and mechanical properties of heat treated AZ91D magnesium alloy were investigated. T1 - Microstructure modeling of magnesium alloys for engineering property prediction. AU - Barker, Erin. AU - Li, Dongsheng. AU - Sun, Xin. AU - Khaleel, Mohammad. PY - /5/ Y1 - /5/ N2 - Magnesium alloys have found increasing application in the transportation industry due to their low weight and high strength.

cast. Cast magnesium alloys are widely employed in powertrain applications, airbag supports, and seat frame in automobiles. Cast magnesium alloys have low ductility compared to other structural materials. Forging process is generally employed to obtain a more homogenous microstructure and better mechanical properties compared to cast alloys. Direct strip casting is a continuous casting process for producing metallic sheet directly from the molten state that minimises the need for substantial secondary processing. This important book is the first to review the implications of strip casting technology for a range of alloys, including carbon and stainless steel, aluminium, magnesium, titanium, copper and other non-ferrous alloys.

@article{osti_, title = {Microstructures and properties of aluminum die casting alloys}, author = {Makhlouf, M M and Apelian, D and Wang, L}, abstractNote = {This document provides descriptions of the microstructure of different aluminum die casting alloys and to relate the various microstructures to the alloy chemistry. It relates the microstructures of the alloys to their main. Keywords: Metallography, Microstructure, Cast magnesium alloys 1. Introduction Magnesium alloys are called green-engineering material with great development potential because of its low density, high specific strength and stiffness, superior damping capacity, good electromagnetic shielding characteristics and good machinability.


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Development of microstructure in cast magnesium alloys by L.Y Wei Download PDF EPUB FB2

Magnesium alloys are widely used in aerospace and automotive industry due to their low density, good mechanical properties, and good castability. Their main disadvantage is low maximum working temperature (about °C for Mg-Al alloys).

This led to the development of Mg-Al-RE or Mg-RE-Zr alloys, which can work up to °C. The chapter will relate to the sand cast and high pressure die cast Cited by: 3. This paper presents an overview of several projects undertaken at CAST to increase our understanding of the solidification characteristics of Mg–Al alloys.

With the increased use of magnesium alloys, and with casting dominating as a production route, there is a need for a more comprehensive understanding of the mechanisms of solidification Cited by: Development of the as-cast microstructure in magnesium-aluminium alloys.

The equilibrium microstructure for all the alloys is % α-magnesium, but non-equilibrium, metastable, eutectic normally forms during solidification and is present in the as-cast microstructure in Mg–Al alloys down to about 2 wt% Al. Download: Download full-size image; Fig.

Mg–Al equilibrium phase diagram, adapted by: The development of light alloys applied in as-cast condition, such as aluminum and magnesium alloys, has proven to be an effective way to reduce their cost and energy consumption. 22, 38, 39) In. Abstract The as cast microstructures of several magnesium alloys in the AM series have been characterised, including the dendritic structure, Al segregation and the Mn containing phases.

Two types of Mn containing particles were found and studied in the alloys mainly by using TEM. Good mechanical properties and corrosion resistance are the key factors for the application of biodegradable magnesium alloy wires as new medical implant materials.

This study is aimed at investigating the influence of microstructural evolution on mechanical and corrosion properties of Mg–2Zn–Nd alloy (ZN20) during room-temperature drawing.

The decreases in the cross-sectional. etched the magnesium alloys (but was fine for pure magnesium), other suspensions were tried. Figure 1 shows mechanical twinning in pure wrought magnesium (% Mg) that was final polished Figure 3. The microstructure of a wrought Mg – 6% Al – % Zn – % Mn alloy (longitudinal plane) after etching with acetic picral and viewing with.

Ahmed, M, GW Lorimer, P Lyon and R Pilkington (). The Effect of Heat Treatment and Composition on the Microstructure and Properties of Cast Mg-Y-RE Alloys. Magnesium Alloys and Their Applications: – Google Scholar. 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: ) Dr.‐Ing.

Götz Hartmann; Dr.‐Ing. Achim Egner‐Walter. AZ31 magnesium alloy sheets were prepared by low-speed extrusion at different temperatures, i.e., °C, °C, and °C. The microstructure evolution and mechanical properties of extruded AZ31 magnesium alloy sheets were studied.

Results indicate that the low-speed extrusion obviously improved the microstructure of magnesium alloys. The need for light-weight materials, especially in the automobile industry, created renewed interest in innovative applications of magnesium materials.

This demand has resulted in increased research and development activity in companies and research institutes in order to achieve an improved property profile and better choice of alloy systems.

Development of New Magnesium Alloys for Advanced Applications (Pages: ) B. Bronfin Extrusion of Magnesium Profiles and Microstructure Characterization (Pages: ) Part I: Investigation of the Corrosion Properties and the Corrosion Mechanisms of PVD Coated Magnesium Die Cast Alloy AZ91 for Tribological Applications (Pages: Magnesium alloys are mixtures of magnesium with other metals (called an alloy), often aluminum, zinc, manganese, silicon, copper, rare earths and ium is the lightest structural metal.

Magnesium alloys have a hexagonal lattice structure, which affects the fundamental properties of these alloys. Plastic deformation of the hexagonal lattice is more complicated than in cubic. In this context, texture and microstructure development is examined after a particular multi-pass rolling and heat treatment processes.

Twin-roll-cast magnesium strips of alloy AZ31, with an initial thickness of mm, rolled to a final thickness of mm, are used as ly, a new thermo-mechanical magnesium strip treatment has. Refinement of α-Mg solid solution grains has a significant influence on the improvement of mechanical properties of cast magnesium alloys.

In the article, the effects of three modifiers on microstructure and properties of AZ91 magnesium alloy casted to a sand mould were described. Overheating, hexachloroethane and wax-CaF2-carbon powder were applied.

MICROSTRUCTURE OF ALLOYS/61 Fig. as-cast ingot showing the typical constituent, predominantlyFe3SiAl/2. in the dendrite interstices. % hydrofluoric acid, x. (Courtesy ofKaiser Aluminum & Chemical Corp.) Fig. homogenized ingot showing the. The development of such high performance creep-resistant alloys requires the development of microstructures in the cast alloy that both prevent grain boundary sliding and restrict the motion of lattice dislocations within the primary α-Mg grains.

Yuan Hao's 85 research works with citations and 3, reads, including: Effect of liquid flow velocity on corrosion behavior of 20# steel at initial stage under gas-liquid two-phase plug flow.

Any improvement in extrusion alloy properties requires a better understanding of the effects of alloy composition and processing conditions; and how these dictate the final alloy microstructure. This review sheds insightful information on the processing–microstructure–property relationships of extruded magnesium alloys.

Magnesium alloys can be categorized into two groups: cast alloys and wrought alloys. Cast alloys are basically made by pouring the molten liquid metal into a mould, within which it solidifies into the required shape. Common cast alloys of magnesium consist of different amounts – but not exceeding 10% – of aluminium, manganese and zinc as.

Microstructures typical of a eutectic aluminum-cerium alloy system are shown in Figures 1 and 2. The as-cast microstructures show a fine interconnected eutectic microstructure and the pure aluminum phase.

The scale of the laths can be as small as nm and do not exhibit preferential direction at standard cooling rates.The problems of high temperature resistance and creep resistance of cast magnesium alloy are pointed out, and its future development direction is forecasted.

The purpose of this paper is to provide the idea and basis for the development of creep resistant and heat resistant magnesium alloy.