Search results

The aim of this research was to study the recycling process and the feasibility to smelt the spent nickel catalyst for the production of nickel alloy or ferronickel.
Introduction Nickel is commercially important as being mainly used as high performance alloys, key alloying element for stainless steel production and electroplating to improve tribological properties and decoration on many types of material surfaces.
The hydrometallurgy process involves acid leaching to obtain nickel in the solution prior to extraction by using different techniques, giving mostly nickel compounds [6-9].
X-ray diffractometer was used to determine phases and compounds (Using Bruker model D8 ADVANCE Cu Ka at condition 40 kV, 40mA).
PATEL, Recovery of nickel from spent catalysts using ultrasonication-assisted leaching, Journal of Chemical Technology & Biotechnology, 86(10) (2011), 1276-1281

The disadvantages of the conventional twin-roll caster for aluminum alloy are low casting speeds and limited choices of alloys that are castable by this processing.
These alloys are expensive for regulation of Fe content to get excellent formability.
The plate of 5000 series of aluminum alloys is used for the structural parts.
However, the twin roll caster for aluminum alloy also has disadvantages, including low casting speed and limitations on alloys that can be cast.
It’s aim to get high roll speed.

Fang, Effect of phase composition on the internal friction and magnetostriction in the L12/D03 biphase Fe-27Ga alloys, Journal of Alloys and Compounds 895, Part 2 (2022) 162661
Fang, Behavior and mechanism of internal friction peak in quenched Fe-18 at.% Ga alloy, Journal of Alloys and Compounds 856 (2021) 158178
Jiang, Tuning magnetostriction of Fe–Ga alloys via stress engineering, Journal of Alloys and Compounds 822 (2020) 153687
Jiang, Internal friction in Fe-Ga alloys at elevated temperatures, Journal of Alloys and Compounds, 785 (2019) 1257-1263
Mosca, Zener relaxation strength in b.c.c. and f.c.c. alloys, Journal of Alloys and Compounds, 211–212 (1994) 522-524

The study is also carried out to investigate the changes in resistivity of alloys during the ageing time in the alloy with and without 50% deformation.
The sizes of GP zones are very fine and evenly distribute in the alloys.
(a) (b) Fig.3 Microstructures of specimens when aged at 170°C for (a) 5h in alloys without deformation, (b) 1h in alloys with 50% deformation.
[7]A.Smolej,M.Gnamus,E.Slacek.Journal of Materials Processing Technology,Vol.118,(2001),p.397 [8] A.
[9]S.Malinov, P.Markovsky, W Sha, et al: Journal of Alloys and Compounds,Vol.314,(2001),p.181

Transient negative strain hardening during severe plastic deformation of Al-30wt%Zn alloys M.
In this work we propose a new model (SOFTMAR) to describe the transient softening observed during severe plastic deformation of Al-30wt%Zn alloys.
Chuvil’deev, Superplasticity and internal friction in microcrystalline AZ91 and ZK60 magnesium alloys processed by equal-channel angular pressing, Journal of Alloys and Compounds 378 (2004) 253-257
Baretzky, Gradual softening of Al–Zn alloys during high-pressure torsion, Materials Letters, 84 (2012) 63-65
Nes, Holmedal, B., Evangelista, E., Marthinsen, K., Modelling grain boundary strengthening in ultra-fine grained aluminum alloys, Mater.

This paper aims to investigate effect of spark plasma sintering temperature on mechanical property of Ti + ZrO2.
Therefore, titanium alloys have been interested in orthopedic applications [3].
However, the mechanical properties of Ti+ZrO2 alloys in the as SPSed state have not clearly studied.
Modern Production Methods for Titanium Alloys: A Review, IntechOpen. 2019
Calculation of Nb-Ti-Zr phase diagram, Journal of Alloys and Compounds. 1994; 206, pp. 121–127

The quaternary Ni-Cu-Fe-P alloys provide the possibility of amorphization and some of them may have supercooled liquid region [4].
Furthermore, it is essential to study the thermal stability of such alloys in order to enable the technological tests of consolidation.
Therefore, the aim of the work is to show the change of the microstructure occurring during the heating at the early stages of the crystallization process in the Ni64Cu9Fe8P19 alloy.
However it is not a rule for every alloy, because there are reports on the amorphous alloys with the positive TRC [7].
Przewoźnik, Journal of Alloys and Compounds, in press.

Quantitative elemental analysis of these layers showed that Ti3Al, TiAl, and TiAl2 compounds, as well as Ti(Al) solid solution could be formed in these zones.
· At the interface between Ti and TiAl3 thin intermediate layers that may consist of such intermetallic compounds as TiAl2, TiAl, and Ti3Al, as well as of a solid solution of Al in the Ti matrix were formed
Fleischer, Intermetallic compounds for high-temperature structural use, Science, 243 (1989) 616-621
Nofar, Micro structural features and mechanical properties of Al-Al3Ti composite fabricated by in-situ powder metallurgy route, Journal of Alloys and Compounds, 473 (2009) 127-132
Ma, Fabrication of multilayered Ti-Al intermetallics by spark plasma sintering, Journal of Alloys and Compounds, 585 (2014) 734-740

The research aim is to investigate the effect of stirring during melting of cast aluminium alloys.
ADC 12 cast aluminium alloys is used in the experiment.
The aim of the research is to investigate the effect of stirring on the quality of ADC 12 cast aluminium alloy.
Typical microstructure features of Al-Si are well observed, such as eutectic Si and Al-Fe-Mn intermetallic compound.
Campbell, “Correlation between Bifilm Index and Toughness of Aluminum Alloys,” in Shape Casting: 5th International Symposium 2014, M.

The α2-Ti3Al compound formed in the fusion zone (FZ) following the annealing process, whereas the γ-TiAl, α2-Ti3Al compounds formed in the FZ and heat affected zone (HAZ) respectively following a solution plus aging treatment.
Both α2-Ti3Al and γ-TiAl nano compounds are found in the Ti-6-4 weldments.
Easterling, Phase transformations in metals and alloys, second, Chapman & Hall, London, 1995
Welsch, Materials Properties Handbook: Titanium Alloys, ASM International, 1994
Kozlova, Physico-Chemical Phase Analysis of Steels and Alloys, Metallurgia, Moskva, (1978), 336