The Relation between Microstructure and Corrosion Behavior of New Mg-Al-X Alloys for Transportation Application

2010 ◽  
Vol 95 ◽  
pp. 43-46
Author(s):  
Guy Ben-Hamu ◽  
D. Eliezer ◽  
Kwang Seon Shin
Keyword(s):  
Corrosion Resistance ◽  
Magnesium Alloys ◽  
Automotive Industry ◽  
Corrosion Behaviour ◽  
Weight Ratio ◽  
High Strength ◽  
Die Cast ◽  
Cast Magnesium Alloys ◽  
Cast Magnesium ◽  
Dc Polarization

New die cast magnesium alloys have increasingly been developed in recent years for the automotive industry due to their high potential as structural materials for low density and high strength/weight ratio demands. However, their poor mechanical properties and low corrosion resistance have led to a search for new kinds of magnesium alloys with better strength, ductility, high temperature behaviour and high corrosion resistance. The main objective of this research is to investigate the corrosion behaviour of new die cast magnesium alloys: Mg-Al-Ca, Mg-Al-Sr. AC and DC polarization tests were carried out on the new alloys. Microstructure was examined using optical and electron microscopy (SEM) and EDS. The additions of Sr and Ca affected the corrosion behaviour. These results can be explained by the effects of alloying elements on the microstructure of Mg alloys such as grain size and precipitates caused by the change in precipitation.

Long Term Creep Properties of a Die-Cast Mg-Al-Ca Alloy

2007 ◽  
Vol 561-565 ◽  
pp. 163-166
Author(s):  
Yoshihiro Terada ◽  
Tatsuo Sato
Keyword(s):  
Creep Rate ◽  
Magnesium Alloys ◽  
Cast Alloy ◽  
Rupture Life ◽  
Testing Temperature ◽  
Creep Rupture ◽  
Die Cast ◽  
Cast Magnesium Alloys ◽  
Term Creep ◽  
Cast Magnesium

Creep rupture tests were performed for a die-cast Mg-Al-Ca alloy AX52 (X representing calcium) at 29 kinds of creep conditions in the temperature range between 423 and 498 K. The creep curve for the alloy is characterized by a minimum in the creep rate followed by an accelerating stage. The minimum creep rate (ε& m) and the creep rupture life (trup) follow the phenomenological Monkman-Grant relationship; trup = C0 /ε& m m. It is found for the AX52 die-cast alloy that the exponent m is unity and the constant C0 is 2.0 x 10-2, independent of creep testing temperature. The values of m and C0 are compared with those for another die-cast magnesium alloys. The value m=1 is generally detected for die-cast magnesium alloys. On the contrary, the value of C0 sensitively depends on alloy composition, which is reduced with increasing the concentration of alloying elements such as Al, Zn and Ca.

scholarly journals A Minuscule Appraise on the Outcome of BI and SB Metallic Additives on Refining the Microstructure and Mechanical Behavior of few Magnesium Alloys

2019 ◽  
Vol 9 (1S4) ◽  
pp. 829-832
Keyword(s):  
Mechanical Properties ◽  
Corrosion Resistance ◽  
Mechanical Behavior ◽  
Magnesium Alloys ◽  
Alloying Elements ◽  
Grain Refiner ◽  
Intermediate Phases ◽  
Cast Magnesium Alloys ◽  
Cast Magnesium

This paper reviews the outcome of bismuth and antimony trappings on the microstructure and mechanical behavior of an assortment of commercial magnesium alloys. Various compositions of the Bi and Sb were discussed along with/without combination of other alloying elements. These additions have revealed to be resulted in the formation of Mg3Bi2 , Mg3Sb2 intermediate phases when added upon with corresponding alloying elements. Moreover the reasons for the observed changes due to the addition of these alloying elements were also reviewed. It is found that the accumulation of Bi phase as well as intermetallics and Sb intermediates has greatly improved the microstructure belonging to the as cast magnesium alloys thereby improving both mechanical and thermo-mechanical properties. It is also observed in the review that addition of thesealloying elements acted as grain refiner and improved the corrosion resistance of commercial magnesium alloys.

TRENDS IN THE DEVELOPMENT OF CAST MAGNESIUM ALLOYS WITH AN INCREASED IGNITION TEMPERATURE (review)

2021 ◽  
pp. 3-9
Author(s):  
A.A. Leonov ◽  
◽  
N.V. Trofimov ◽  
V.A. Duyunova ◽  
Z.P. Uridiya ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Magnesium Alloys ◽  
High Temperatures ◽  
Fire Resistance ◽  
Ignition Temperature ◽  
Mechanical Characteristics ◽  
Chemical Characteristics ◽  
Increased Temperature ◽  
Cast Magnesium Alloys ◽  
Cast Magnesium

Trends in the development of cast magnesium alloys with increased temperature, ignition and fire resistance are presented. The main world companies and institutions - developers of casting magnesium alloys are presented. The developed alloys are considered, indicating their chemical characteristics, mechanical characteristics at high and high temperatures and corrosion resistance, as well as the use of materials and design aspects of industry. The presented magnesium alloys with an increased ignition temperature allow expanding the scope of their use.

Optimisation of the Quality of High Pressure Die Cast Magnesium Alloys

2013 ◽  
pp. 305-313
Author(s):  
A.K. Dahle ◽  
S. Saunes ◽  
D.H. StJohn ◽  
H. Westengen
Keyword(s):  
High Pressure ◽  
Magnesium Alloys ◽  
Die Cast ◽  
Cast Magnesium Alloys ◽  
Cast Magnesium

scholarly journals Proof stress measurement of die-cast magnesium alloys

2016 ◽  
Vol 112 ◽  
pp. 402-409 ◽  
Author(s):  
Hua Qian Ang ◽  
Trevor B. Abbott ◽  
Suming Zhu ◽  
Chengfan Gu ◽  
Mark A. Easton
Keyword(s):  
Magnesium Alloys ◽  
Stress Measurement ◽  
Proof Stress ◽  
Die Cast ◽  
Cast Magnesium Alloys ◽  
Cast Magnesium
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