ah_zafari [Contributor]
Jun 15, 2012
Writing Feedback / 'magnesium alloys' - The introduction of a scientific paper [20]
Hi, I wrote a part of the introduction of an article below. Please help me to improve it. This is just a part of the inroduction, and I am writing the rest of it. Thanks in advance.
Mg-Al-based magnesium alloys could draw the attention of many industries, especially airspace and automotive ones, because of their great castability, good corrosion resistance and appropriate room-temperature mechanical properties. AZ91 magnesium alloy is the most commonly used Mg-Al alloy at low temperature applications. However, the use of this alloy at the temperatures over 110-120 şC is limited due to its poor mechanical properties at elevated temperatures. The formation of -Mg17Al12 phase in the interdendritic regions, is known as the main reason of weak mechanical properties of AZ91 alloy at high temperatures. This phase has a low melting point (i.e., 437 şC) and low thermal stability. As a result, AZ91 alloy loses its strength stemming from dissolution, coarsening and softening of -Mg17Al12 intermetallics.
Numerous studies have been conducted to improve the mechanical properties of this alloy at elevated temperatures. Most of the investigations have focused on replacing unstable -Mg17Al12 phase with thermally stable intermetallics by addition of some elements such as Ca, Y, RE, etc, to the alloy through alloying process.
Poor wear behavior of AZ91 alloy is another important factor which can limit the applications of it. The tribological behavior of this alloy has attract the attention of a group of researchers over last years.
Hi, I wrote a part of the introduction of an article below. Please help me to improve it. This is just a part of the inroduction, and I am writing the rest of it. Thanks in advance.
Mg-Al-based magnesium alloys could draw the attention of many industries, especially airspace and automotive ones, because of their great castability, good corrosion resistance and appropriate room-temperature mechanical properties. AZ91 magnesium alloy is the most commonly used Mg-Al alloy at low temperature applications. However, the use of this alloy at the temperatures over 110-120 şC is limited due to its poor mechanical properties at elevated temperatures. The formation of -Mg17Al12 phase in the interdendritic regions, is known as the main reason of weak mechanical properties of AZ91 alloy at high temperatures. This phase has a low melting point (i.e., 437 şC) and low thermal stability. As a result, AZ91 alloy loses its strength stemming from dissolution, coarsening and softening of -Mg17Al12 intermetallics.
Numerous studies have been conducted to improve the mechanical properties of this alloy at elevated temperatures. Most of the investigations have focused on replacing unstable -Mg17Al12 phase with thermally stable intermetallics by addition of some elements such as Ca, Y, RE, etc, to the alloy through alloying process.
Poor wear behavior of AZ91 alloy is another important factor which can limit the applications of it. The tribological behavior of this alloy has attract the attention of a group of researchers over last years.