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Magnesium Alloy WE43 and WE43-T5 - Mechanical and Thermal Properties.

Record Type:	Language materials, manuscript : Monograph/item
Title/Author:	Magnesium Alloy WE43 and WE43-T5 - Mechanical and Thermal Properties./
Author:	Xiang, Chongchen.
Description:	1 online resource (109 pages)
Notes:	Source: Dissertations Abstracts International, Volume: 78-12, Section: B.
Contained By:	Dissertations Abstracts International78-12B.
Subject:	Mechanical engineering. -
Online resource:	click for full text (PQDT)
ISBN:	9781369835106

Magnesium Alloy WE43 and WE43-T5 - Mechanical and Thermal Properties.
Xiang, Chongchen.

Magnesium Alloy WE43 and WE43-T5 - Mechanical and Thermal Properties. - 1 online resource (109 pages)

Source: Dissertations Abstracts International, Volume: 78-12, Section: B.

Thesis (Ph.D.)--Polytechnic Institute of New York University, 2016.

Includes bibliographical references

Magnesium alloys are promising in aerospace, automotive and electronic industries due to low density, high specific strength and excellent machinability. A rare earth element alloy (WE43) is studied in as cast and heat treated conditions. Multiscale characterization is conducted to understand the nanomechanical response using a nanoindentor and microscale behavior using tensile tests. Further, compressive characterization is conducted across six orders of strain rate magnitudes from 10-3 to 3x103 s -1 under the range of liquid nitrogen (-196°C) to room temperature (25°C). Based on the results, a constitutive model is developed to estimate the plastic behavior of as-cast WE43 and WE43-T5 at different strain rates and under different temperatures. In addition, dynamic properties are studied using a dynamic mechanical analyzer at 1-100 Hz loading frequencies and the temperature range from 35°C to 500°C. Only Yttrium-rich cuboidal phase and zirconium-rich phase were present in WE43-T5 alloy and the eutectic phase was absent. Also, the grain size was reduced due to the hot rolling process. The difference in microstructure reflects into the mechanical properties. WE43-T5 specimens have improved mechanical properties over the as-cast alloy. Two transition temperatures are found at 210 and 250°C based on the storage and loss moduli results. The Mg24Y5 peak is found in the high temperature x-ray diffraction results along with a new Mg12Nd peak at those two temperature points. The corrosion behavior, studied by 7-day immersion in 3.5% NaCl solution, shows that the heat treated alloy has significantly lower corrosion rate than the as-cast alloy due to the absence of the eutectic mixture in the microstructure. With rapidly growing applications of magnesium alloys, particularly with rare earth elements, this study is expected to provide critical data and structure-property correlations that will help the scientific community.

Electronic reproduction.
Ann Arbor, Mich. :
ProQuest,
2024

Mode of access: World Wide Web

ISBN: 9781369835106Subjects--Topical Terms:

557493
Mechanical engineering.
Subjects--Index Terms:

CorrosionIndex Terms--Genre/Form:

554714
Electronic books.

Magnesium Alloy WE43 and WE43-T5 - Mechanical and Thermal Properties.
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245 1 0 $a Magnesium Alloy WE43 and WE43-T5 - Mechanical and Thermal Properties.
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500 $a Source: Dissertations Abstracts International, Volume: 78-12, Section: B.
500 $a Publisher info.: Dissertation/Thesis.
500 $a Advisor: Gupta, Nikhil.
502 $a Thesis (Ph.D.)--Polytechnic Institute of New York University, 2016.
504 $a Includes bibliographical references
520 $a Magnesium alloys are promising in aerospace, automotive and electronic industries due to low density, high specific strength and excellent machinability. A rare earth element alloy (WE43) is studied in as cast and heat treated conditions. Multiscale characterization is conducted to understand the nanomechanical response using a nanoindentor and microscale behavior using tensile tests. Further, compressive characterization is conducted across six orders of strain rate magnitudes from 10-3 to 3x103 s -1 under the range of liquid nitrogen (-196°C) to room temperature (25°C). Based on the results, a constitutive model is developed to estimate the plastic behavior of as-cast WE43 and WE43-T5 at different strain rates and under different temperatures. In addition, dynamic properties are studied using a dynamic mechanical analyzer at 1-100 Hz loading frequencies and the temperature range from 35°C to 500°C. Only Yttrium-rich cuboidal phase and zirconium-rich phase were present in WE43-T5 alloy and the eutectic phase was absent. Also, the grain size was reduced due to the hot rolling process. The difference in microstructure reflects into the mechanical properties. WE43-T5 specimens have improved mechanical properties over the as-cast alloy. Two transition temperatures are found at 210 and 250°C based on the storage and loss moduli results. The Mg24Y5 peak is found in the high temperature x-ray diffraction results along with a new Mg12Nd peak at those two temperature points. The corrosion behavior, studied by 7-day immersion in 3.5% NaCl solution, shows that the heat treated alloy has significantly lower corrosion rate than the as-cast alloy due to the absence of the eutectic mixture in the microstructure. With rapidly growing applications of magnesium alloys, particularly with rare earth elements, this study is expected to provide critical data and structure-property correlations that will help the scientific community.
533 $a Electronic reproduction. $b Ann Arbor, Mich. : $c ProQuest, $d 2024
538 $a Mode of access: World Wide Web
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650 4 $a Materials science. $3 557839
653 $a Corrosion
653 $a Magnesium alloy
653 $a Nano-indentation
653 $a Rare earth element
653 $a Strain rate dependent
653 $a Temperature dependent
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710 2 $a Polytechnic Institute of New York University. $b Mechanical and Aerospace Engineering. $3 1472666
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