Towards a morphological control of Mg2Si and superior tensile properties of high-Zn Mg-0.6Si (-Zn) alloys

This study investigated the microstructure and tensile properties of three indirectly extruded Mg-Sn-Al-Zn alloys: Mg-11Sn-1Al-1Zn (TAZ1111), Mg-8Sn-4Al-1Zn (TAZ841), and Mg-8Sn-1Al-4Zn (TAZ814). The investigation results revealed that in all the alloys, Mg2Sn particles formed during solidification were not fully dissolved by homogenization treatment. These undissolved particles enhanced the dynamic recrystallization behavior through a particle-stimulated nucleation phenomenon. As a result, all the extruded alloys exhibited a fully dynamically recrystallized microstructure. The tensile yield strength (TYS) of the extruded alloys was in the following order: TAZ1111 > TAZ841 > TAZ814. In contrast, the elongation of the alloys was in the opposite order: TAZ814 > TAZ841 > TAZ1111. The highest TYS of the TAZ1111 alloy was attributed mainly to the smaller grain size and more abundant Mg2Sn precipitates resulting from a higher Sn content. However, the ultimate tensile strengths of all the extruded alloys were nearly the same because the Al or Zn atoms dissolved in the TAZ841 and TAZ814 alloys improved the strain hardening rate during plastic deformation.

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Effects of Al and Zn contents and heat treatment on microstructures and tensile properties of Mg-Al-Zn alloys

Journal of Japan Institute of Light Metals ◽

10.2464/jilm.55.456 ◽

2005 ◽

Vol 55 (10) ◽

pp. 456-462 ◽

Cited By ~ 5

Author(s):

Yu YOSHIDA ◽

Keita ARAI ◽

Shota ITOH ◽

Shigeharu KAMADO ◽

Toshiaki WADA ◽

...

Keyword(s):

Heat Treatment ◽

Tensile Properties ◽

Zn Alloys

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Microstructure and Mechanical Properties of Cast and Semi-Solid Formed Mg-Al-Zn Alloys

Solid State Phenomena ◽

10.4028/www.scientific.net/ssp.116-117.288 ◽

2006 ◽

Vol 116-117 ◽

pp. 288-291 ◽

Cited By ~ 1

Author(s):

Jeong Min Kim ◽

Bong Koo Park ◽

Joong Hwan Jun ◽

Ki Tae Kim ◽

Woon Jae Jung

Keyword(s):

Mechanical Properties ◽

Grain Boundary ◽

Tensile Properties ◽

Room Temperature ◽

Forming Process ◽

Microstructure And Mechanical Properties ◽

Cast Alloys ◽

Semi Solid ◽

Zn Alloys ◽

Conventionally Cast

Various Mg-Al-Zn alloys with different Al and Zn contents were fabricated by conventional casting and semi-solid forming process. And the microstructure and mechanical properties of the alloys were investigated. In Mg-4%Al-(5~7)%Zn alloys most of the grain boundary phases were found to be Mg-Al-Zn while in Mg-6%Al or Mg-8%Al based alloys the Mg- Al-Zn phase coexisted with Mg17Al12 at grain boundaries. At room temperature the semi-solid formed alloys showed significantly higher tensile properties, especially elongation, than the conventionally cast alloys.

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The microstructure, tensile properties, and creep behavior of Mg–Zn alloys containing 0–4.4wt.% Zn

Materials Science and Engineering A ◽

10.1016/j.msea.2005.11.006 ◽

2006 ◽

Vol 417 (1-2) ◽

pp. 315-321 ◽

Cited By ~ 97

Author(s):

C.J. Boehlert ◽

K. Knittel

Keyword(s):

Tensile Properties ◽

Creep Behavior ◽

Zn Alloys

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Effect of Aluminium Content on the Tensile Properties of Mg-Al-Zn Alloys

Jurnal Kejuruteraan ◽

10.17576/jkukm-2014-26-05 ◽

2014 ◽

Vol 26 ◽

pp. 35-40

Author(s):

N. Abdul Latif ◽

Z. Sajuri ◽

J. Syarif

Keyword(s):

Tensile Properties ◽

Aluminium Content ◽

Zn Alloys

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Evaluating Microstructure, Wear Resistance and Tensile Properties of Al-Bi(-Cu, -Zn) Alloys for Lightweight Sliding Bearings

Metals ◽

10.3390/met11010153 ◽

2021 ◽

Vol 11 (1) ◽

pp. 153

Author(s):

Rodrigo André Valenzuela Reyes ◽

Amauri Garcia ◽

José Eduardo Spinelli

Keyword(s):

Wear Resistance ◽

Tensile Properties ◽

Flow Conditions ◽

Present Contribution ◽

Sliding Bearings ◽

Cu Alloys ◽

Transient Heat Flow ◽

Minority Phase ◽

Solidification Parameters ◽

Zn Alloys

One of the most important routes for obtaining Al-Bi-x monotectic alloys is directional solidification. The control of the thermal solidification parameters under transient heat flow conditions can provide an optimized distribution of the Bismuth (Bi) soft minority phase embedded into an Al-rich matrix. In the present contribution, Al-Bi, Al-Bi-Zn, and Al-Bi-Cu alloys were manufactured through this route with their microstructures characterized and dimensioned based on the solidification cooling rates. The main purpose is to evaluate the influence of typical hardening elements in Al alloys (zinc and copper) in the microstructure, tensile properties, and wear of the monotectic Al-Bi alloy. These additions are welcome in the development of light and more resistant alloys due to the growing demands in new sliding bearing designs. It is demonstrated that the addition of 3.0 wt.% Cu promotes microstructural refining, doubles the wear resistance, and triples the tensile strength with some minor decrease in ductility in relation to the binary Al-3.2 wt.% Bi alloy. With the addition of 3.0 wt.% Zn, although there is some microstructural refining, little contribution can be seen in the application properties.

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