scholarly journals The Effect of Sn Addition on Zn-Al-Mg Alloy; Part I: Microstructure and Phase Composition

Materials ◽  
2021 ◽  
Vol 14 (18) ◽  
pp. 5404
Author(s):  
Peter Gogola ◽  
Zuzana Gabalcová ◽  
Martin Kusý ◽  
Henrich Suchánek
Keyword(s):  
Phase Transformation ◽  
Phase Composition ◽  
Solid Solutions ◽  
Volume Content ◽  
Intermetallic Phases ◽  
Mg Alloy ◽  
Transformation Temperatures ◽  
Mg2sn Phase ◽  
Alloy Part ◽  
Xrd Techniques

In this study, the addition of Sn on the microstructure of Zn 1.6 wt.% Al 1.6 wt.% Mg alloy was studied. Currently, the addition of Sn into Zn-Al-Mg based systems has not been investigated in detail. Both as-cast and annealed states were investigated. Phase transformation temperatures and phase composition was investigated via DSC, SEM and XRD techniques. The main phases identified in the studied alloys were η(Zn) and α(Al) solid solutions as well as Mg2Zn11, MgZn2 and Mg2Sn intermetallic phases. Addition of Sn enabled the formation of Mg2Sn phase at the expense of MgxZny phases, while the overall volume content of intermetallic phases is decreasing. Annealing did not change the phase composition in a significant way, but higher Sn content allowed more effective spheroidization and agglomeration of individual phase particles.

Drug solid solutions – a method for tuning phase transformations

CrystEngComm ◽  
2014 ◽  
Vol 16 (26) ◽  
pp. 5827-5831 ◽  
Author(s):  
Amit Delori ◽  
Pauline Maclure ◽  
Rajni M. Bhardwaj ◽  
Andrea Johnston ◽  
Alastair J. Florence ◽  
...  
Keyword(s):  
Phase Transformation ◽  
Phase Transformations ◽  
Solid Solutions ◽  
Transformation Temperatures

Tuning phase transformation temperatures through the use of solid solutions.

scholarly journals Experimental Study of the Al-Mg-Sr Phase Diagram at 400°C

2014 ◽  
Vol 2014 ◽  
pp. 1-6 ◽  
Author(s):  
D. Kevorkov ◽  
M. Medraj ◽  
M. Aljarrah ◽  
Jian Li ◽  
E. Essadiqi ◽  
...  
Keyword(s):  
Phase Diagram ◽  
Experimental Study ◽  
Isothermal Section ◽  
Phase Equilibria ◽  
Phase Analysis ◽  
Solid Solutions ◽  
Intermetallic Phases ◽  
Experimental Literature ◽  
Substitutional Solid Solutions ◽  
Xrd Techniques

The Al-Mg-Sr system is experimentally studied at 400°C using EPMA and XRD techniques. It was determined that the intermetallic phases in the Al-Mg-Sr system have a tendency to form extended substitutional solid solutions. Two ternary phases were found in this system. Solubility limits of binary and ternary phases were determined and the phase equilibria among phases were established. The isothermal section of the Al-Mg-Sr system at 400°C has been constructed using results of the phase analysis and experimental literature data.

Study of as-cast Nb-Ru samples

MRS Advances ◽  
2018 ◽  
Vol 3 (34-35) ◽  
pp. 1949-1953
Author(s):  
S. Samal ◽  
L.A. Cornish
Keyword(s):  
Phase Transformation ◽  
High Temperature ◽  
Shape Memory ◽  
Optical Microscopy ◽  
Solid Solutions ◽  
Single Phase ◽  
Intermetallic Phases ◽  
Argon Atmosphere ◽  
Arc Melting ◽  
Cast Alloys

AbstractThe Nb-Ru system is of interest because the ∼NbRu phase has potential for high temperature shape memory alloys. Previous workers have identified the phase transformation variously as involving twinning, of cubic-to-tetragonal and tetragonal–to-orthorhombic (or monoclinic) transformations. As well as the terminal (Nb) and (Ru) solid solutions, two intermetallic phases have been identified: ∼NbRu and ∼NbRu3 / ∼Nb3Ru5 / ∼NbRu2, but the boundaries between the different phases are still not fully established. This investigation looked at six as-cast alloys of different compositions across the Nb-Ru system, which were made from 99.95 % purity Nb and Ru. The samples were made by arc-melting under an argon atmosphere, using titanium as an oxygen-getter. These samples were sectioned and prepared metallographically for optical microscopy, SEM and XRD analyses, the latter using an X’pert database. The phases found were (Nb), (Ru), ∼NbRu and “∼NbRu3”, as expected. Although the samples were mainly homogeneous, there was porosity in the (Ru) phase between the “∼NbRu3” dendrites in the Nb28.5:Ru71.5 at.% sample. The Nb14.2:Ru85.8 at.% sample was mainly single-phase (Ru).

scholarly journals Prediction and measurement of selected phase transformation temperatures of steels

2017 ◽  
Vol 53 (3) ◽  
pp. 391-398 ◽  
Author(s):  
O. Martiník ◽  
B. Smetana ◽  
J. Dobrovská ◽  
A. Kalup ◽  
S. Zlá ◽  
...  
Keyword(s):  
Thermal Analysis ◽  
Phase Transformation ◽  
Statistical Evaluation ◽  
Precise Determination ◽  
Experimental Measurements ◽  
Transformation Temperatures ◽  
Literature Research ◽  
Computational Thermodynamic ◽  
Peritectic Transition

The study deals with precise determination of phase transformation temperatures of steel. A series of experimental measurements were carried out by Differential Thermal Analysis (DTA) and Direct Thermal Analysis (TA) to obtain temperatures very close to the equilibrium temperatures. There are presented results from the high temperatures region, above 1000?C, with focus on the solidus temperatures (TS), peritectic transition (TP) and liquidus (TL) of multicomponent steels. The data obtained were verified by statistical evaluation and compared with computational thermodynamic and empirical calculations. The calculations were performed using 15 empirical equations obtained by literature research (10 for TL and 5 for TS), as well as by software InterDendritic Solidification (IDS) and Thermo-Calc (2015b, TCFE8; TC). It was verified that both thermo-analytical methods used are set correctly; the results are reproducible, comparable and close to equilibrium state.

Metallograpiuc Study of Gasar Porous Magnesium

1998 ◽  
Vol 521 ◽  
Author(s):  
Chanman Park ◽  
Steven R. Nutt
Keyword(s):  
Pore Size ◽  
Microstructural Evolution ◽  
Intermetallic Phases ◽  
Mg Alloy ◽  
Porous Metals ◽  
Microstructural Study ◽  
Az31 Mg Alloy ◽  
Microscopic Studies ◽  
Porous Magnesium ◽  
Gasar Process

ABSTRACTOne of the promising techniques for making porous metals is the so-called GASAR process. In principle, the process affords considerable control over pore size, shape, and distribution. However, in practice, the pore microstructure is difficult to control, and a clearer understanding of microstructural evolution would be helpful. In this study, we undertake a detailed microstructural study of a porous Mg and AZ31 Mg alloy synthesized by the GASAR process. Microscopic studies demonstrated the presence of different pore size ranges. The pore distribution depended on the distance from the chill end of ingots. TEM observations revealed apparent crack lines (gas tracks) near the pores and ternary intermetallic phases in the alloy.

Phase transformation and two-mode phonon behavior of (1−x) [Ba Zr0.025Ti0.975O3]–(x) [BiFeO3] solid solutions

2014 ◽  
Vol 600 ◽  
pp. 186-192 ◽  
Author(s):  
Priyanka A. Jha ◽  
Pardeep K. Jha ◽  
A.K. Jha ◽  
R.K. Kotnala ◽  
R.K. Dwivedi
Keyword(s):  
Phase Transformation ◽  
Solid Solutions
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