Effect of magnesium addition on the vacancy-Mg binding free enthalpy in Al-Cr alloys

The Mg-vacancy binding free enthalpy of Al-Cr solid solution alloys with Mg addition was calculated by electrical resistivity measurements. The obtained value is lower than that obtained for dilute Al-Mg alloys with almost the same Mg content and may be attributed to the diffusion of Mg.

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The Effect of Mg on the Wetting Behavior of SiC-Al System

Materials Science Forum ◽

10.4028/www.scientific.net/msf.893.132 ◽

2017 ◽

Vol 893 ◽

pp. 132-135

Author(s):

Zhi Xin Liu ◽

Wen Song Lin

Keyword(s):

Contact Angle ◽

Transition Temperature ◽

Interfacial Reaction ◽

Sessile Drop ◽

Mg Alloys ◽

Wetting Behavior ◽

Mg Addition ◽

Mg Content ◽

Al Mg Alloys

The wetting behavior of SiC by molten Al and Al-Mg alloys using the sessile-drop testing equipment was investigated. The results showed that Mg has a remarkable influence on the wettability and reaction in the Al/SiC system. The contact angle between SiC substrate and molten Al-Mg alloys decreased more quickly with increasing of Mg content. The transition temperature from non-wetting to wetting dropped with increasing of Mg content, suggesting that the addition of Mg does promote the wettability of SiC by molten Al. The role of the Mg addition on the wetting was presumably attributed to its deoxidation as well as the inhibition of the interfacial reaction between Al and SiC.

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Effect of alloying with transition metals on the aging of anomalously supersaturated solid solution of Al–Mg alloys

Applied Nanoscience ◽

10.1007/s13204-021-01705-x ◽

2021 ◽

Author(s):

Tetiana O. Monastyrska ◽

Alla L. Berezina ◽

Oleh A. Molebny ◽

Andrii V. Kotko

Keyword(s):

Solid Solution ◽

Transition Metals ◽

Supersaturated Solid Solution ◽

Mg Alloys ◽

Al Mg Alloys ◽

Effect Of Alloying

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Critical concentration of Mg addition for plastic instabilities in Al–Mg alloys

Journal of Materials Research ◽

10.1557/jmr.2000.0147 ◽

2000 ◽

Vol 15 (5) ◽

pp. 1037-1040 ◽

Cited By ~ 22

Author(s):

N. Q. Chinh ◽

F. Csikor ◽

Zs. Kovács ◽

J. Lendvai

Keyword(s):

Room Temperature ◽

Loading Rate ◽

Critical Concentration ◽

Solute Concentration ◽

Mg Alloys ◽

Depth Sensing ◽

Solute Content ◽

Mg Addition ◽

Constant Loading Rate ◽

Al Mg Alloys

Plastic instabilities were investigated by the depth-sensing microhardness test in binary high-purity Al–Mg alloys with different Mg contents. During the tests the applied load was increased from 0 to 2000 mN at constant loading rate. The instabilities appeared as characteristic steps in the load–depth curves during indentation. It was shown that the occurrence and development of the plastic instabilities depend strongly on the solute content. Furthermore, the plastic instabilities occurred only when the solute concentration was larger than a critical value, C0. From room-temperature tests on Al–Mg alloys, C0 was found to be 0.86 wt% Mg. The critical concentration, which is necessary to get plastic instabilities, was also interpreted theoretically.

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Effects of high Mg content and processing parameters on Portevin-Le Chatelier and negative strain rate sensitivity effects in Al–Mg alloys

Materials Science and Engineering A ◽

10.1016/j.msea.2020.139151 ◽

2020 ◽

Vol 779 ◽

pp. 139151 ◽

Cited By ~ 3

Author(s):

Chang-Hee Cho ◽

Hyeon-Woo Son ◽

Jae-Cheol Lee ◽

Kwang-Tae Son ◽

Ji-Woon Lee ◽

...

Keyword(s):

Strain Rate ◽

Strain Rate Sensitivity ◽

Rate Sensitivity ◽

Processing Parameters ◽

Mg Alloys ◽

Negative Strain Rate Sensitivity ◽

Mg Content ◽

Al Mg Alloys

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Influence of Mg Content, Grain Size and Strain Rate on Mechanical Properties and DSA Behavior of Al-Mg Alloys Processed by ECAP and Annealing

Materials Science Forum ◽

10.4028/www.scientific.net/msf.794-796.870 ◽

2014 ◽

Vol 794-796 ◽

pp. 870-875 ◽

Cited By ~ 3

Author(s):

Min Zha ◽

Yan Jun Li ◽

Ragnvald H. Mathiesen ◽

Christine Baumgart ◽

Hans J. Roven

Keyword(s):

Mechanical Properties ◽

Grain Size ◽

Strain Rate ◽

Room Temperature ◽

Uniform Elongation ◽

Mg Alloys ◽

Lower Strain Rate ◽

Lower Strain ◽

Mg Content ◽

Al Mg Alloys

Ultrafine-grained (UFG) binary Al-xMg (x=1, 5 and 7 wt %) alloys were processed by equal channel angular pressing (ECAP) at room temperature via route Bccombined with inter-pass annealing. The effects of Mg content, grain size and strain rate on mechanical properties and dynamic strain aging (DSA) behaviour of the Al-Mg alloys upon tensile testing at room temperature were studied. An increase in Mg content from 5 to 7 wt % leads to a pronounced increase in strength and uniform elongation in both the as-homogenized and as-ECAP Al-Mg alloys. Thereby, the Al-7Mg alloy, either prior to or after ECAP processing, possess significantly higher strength and comparable or even higher uniform elongation than the more dilute Al-Mg alloys. However, the as-ECAP Al-Mg alloys exhibit significantly higher strength but little work hardening and hence rather limited uniform elongation. In general, decreasing grain size leads to significant increase in strength while dramatic decrease in ductility. Moreover, DSA serration amplitudes increase with reducing grain size in the micrometer range. However, the UFG Al-Mg alloys exhibit much less DSA effect than the micrometer scaled grain size counterparts, i.e. probably due to the high dislocation densities and special grain boundary features in the UFG materials. Also, the Al-Mg alloys, especially those with a UFG structure, exhibit higher strength and ductility at lower strain rate than at higher strain rate, due mainly to enhanced DSA effect and hence work hardening at a lower strain rate.

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