Search results

This paper summarized the different heat treatment processes on the microstructure and properties of the 7000 series aluminum alloys so that the readers can choose the most suitable heat treatment processes for different type of 7000 Al alloy.
The Chinese Journal of Nonferrous Metals,2008,18(5):764-770
The Chinese Journal of Nonferrous Metals,2012,22(8):2154-2162
The Chinese Journal of Nonferrous Metals，2012，22(6)：1546-1554
The Chinese Journal of Nonferrous Metals，2012，22(11) ：3006-3014

In the recent years, the extensive research has been carried out in order to design new high strength Mg alloys with various combinations of alloying elements, strengthening phases as well as methods of processing [3-5].
It has been proved that they have better mechanical properties than the conventional alloys [6–8].
Conclusions Thixomolding is adequate technology for producing metal-matrix nanocomposites based on magnesium alloys.
Kainer, Magnesium Alloys and Their Applications, Wiley-VCH, Weinheim, 2000
Song, Characteristics and mechanical properties of magnesium matrix composites reinforced with micron/submicron/nano SiC particles, Journal of Alloys and Compounds 686 (2016) 831-840.

AMC uses Al-Zn alloys with a ratio of 90% to 10% by mass.
Zn alloys in industry are mainly Zn-Al-based alloys with high Al content, which are very avoided in the biomedical field [7].
Al-Aqeeli, “Magnesium-based composites and alloys for medical applications: A review of mechanical and corrosion properties,” Journal of Alloys and Compounds, vol. 792, pp. 1162– 1190, 2019, doi: 10.1016/j.jallcom.2019.04.080
Koç, “Mechanical, electrochemical and biocompatibility evaluation of AZ91D magnesium alloy as a biomaterial,” Journal of Alloys and Compounds, vol. 687, pp. 906–919, 2016, doi: 10.1016/j.jallcom.2016. 05.256
Garcia, “The effect of the dendritic microstructure on the corrosion resistance of Zn-Al alloys,” Journal of Alloys and Compounds, vol. 397, no. 1–2, pp. 179–191, 2005, doi: 10.1016/j.jallcom.2005.01.035

The research aims to identify the optimal welding conditions that ensure robust and reliable bonding of these complex materials, given their unique microstructural and mechanical properties.
Superalloys H13 and Alloy 718 with complex chemical compositions, containing alloying elements such as Fe, Cr, Ni, Mo, Nb, Ti determines complex interactions during the welding process leading to the formation of intermetallic phases and brittle compounds at the welding interface.
Acknowledgements The paper has been developed within the project PN 23 37 01 03 entitle „Research on the development of 3D printed high entropy alloys for the construction of severely wear and vibration stressed components” funded within the Program Nucleus of ISIM Timisoara (contract 23 37 (2023-2026)).
Orlov, Influence of ultrasonic impact treatment on structure and properties of 3D-printed metals and alloys, International Samsonov Conference “Materials Science of Refractory Compounds”(27-30 may 2024), https://umrs.org.ua/msrc-2024/abstracts/10.62564/m4-ab1149; [5] D.
Zhao, Ultrasonic spot welding of magnesium alloy to titanium alloy, Scripta Mater 126 (2017) pp.58–62, https://doi.org/10.1016/j.scriptamat.2016.08.003; [7] S.

In this aim, the researches were directed in finding a new class of stronger and more ductile, with improved formability iron based alloys, leading to the reduction of the components mass by reducing their thickness [1, 2, 3].
The key to obtain such alloys is the nanoscale structure.
Recrystallization of amorphous alloys obtained by rapid solidification has a tendency to form meta-stable phases and high symmetry crystallographic phases during recrystallization when compared to similar alloys that crystallize.
The obtained master alloys were divided into four equal parts.
Egami, Glass transition and viscosity in metallic glasses and liquids, Journal of Alloys and Compounds, 434-435, 2007, 110 -114 [10] W.

Yao [10] designed a compound damper used SMA wire and viscous damping material which aimed at the problem of viscous damper is not significantly increase structural damping under low order frequency loading.
[3] BassemAndrawes, A.M.ASCE; and Reginald DesRoches, A.M.ASCE•Comparison between Shape Memory Alloy Seismic Restrainers and Other Bridge Retrofit Devices[J]•Journal of Bridge Engineering( 2007),12(6): 700-709
A new type of shape memory alloy damper.
Journal of Structure Building(2005), 26:3, 44-49.
Shape memory alloys as new materials for a seismic isolation.

Thus, with prolonged exposure to aluminum-steel bimetal, the first inclusions of intermetallic compounds begin to appear already at temperatures of 300 ... 350 °C [7-13].
A radical technique that eliminates the loss of strength during heating of bimetallic compounds is the creation of a diffusion barrier in the form of an additional intermediate layer between the layers of the composite [14-17], which prevents the formation of intermetallic compounds.
The aim of this work was to create a heat-resistant composite A5-Cr-St3 with a diffusion barrier, study the structure and properties of the compounds.
This is due to the positive effect of chromium and the lack of connection between aluminum and steel brittle alloys (Fig. 2, a), reducing the strength of the composite.
Kuz'min, A Study of the Structure and Reqularities of Formation of the Compounds during Explosive Welding of Steel-Aluminum Composite, Solid State Phenomena. 284 (2018) 212-217

Among these strategies, the aim is to hope to obtain a favorable property of high initial charge/discharge efficiency and long cycle life.
During the first charging process, a platform between 0.5V and 0.6V exhibits the process of amorphous silicon formed from LixSi alloy.
[16] Xiangkai Kong, Zhixing Wang, Huajun Guo, Xinhai Li, Silin Huang, Lei Gan, Metal-free Si-doped graphene: A new and enhanced anode material for Li ion battery, Journal of Alloys and Compounds.687(2016), 534-540
[18] Yurong Ren, Ximin Wu, Mingqi Li, Highly stable SiOx/multiwall carbon nanotube/N-doped carbon composite as anodes for lithium-ion batteries, Journal of Alloys and Compounds.113(2016), 1032- 1045
[20] Rong Zhou, Huajun Guo, Yong Yang, Zhixing Wang, Xinhai Li, Yu Zhou, N-doped carbon layer derived from polydopamine to improve the electrochemical performance of spray-dried Si/graphite composite anode material for lithium ion batteries, Journal of Alloys and Compounds. 689(2016), 130-137.

Magnesium alloys are the lightest, widely used structural material.
The alloy was refined by: chemical refinement with the use of carbon compounds at the temperature of 720˚C, the homogenization of the granule by way of overheating the alloy up to the temperature of 860˚C, holding the alloy in that temperature for 10 minutes, fast cooling down to the casting temperature - 765 ˚C.
References [1] ASM Speciality Handbook.: Magnesium and magnesium alloys.
StJohn, Development of the as-cast microstructure in magnesium-aluminium alloys, Journal of Light Metals 1 (2001) 61-72 [4] Y.
Stanzl-Tshegg, Influence of porosity on the fatigue limit of die cast magnesium and aluminium alloys, International Journal of Fatigue 25 (2003) 245-256

The aim of this work is to study the influence of the NiAl content and of the Al/Ni ratio on the microstructure and the oxidation behaviour of chromium base alloys up to 1300°C.
Fig. 1 shows the structure of three as cast Cr-Ni-Al alloys.
Conclusions Two phased Cr-NiAl alloys were synthesized.
Roques: Oxidation and protection of Niobium base alloys, Colloque C9, Supplement to the journal of physics III, Vol.3 (1993) [3] V.
, B.Sundman: Thermodynamic Re-Assessment of the Ternary System Al Cr-Ni, CALPHAD, 25, No. 2, 279-298 (2005) [10] P.Saltykov, O.Fabrichnaya, J.Golczewski, F.Aldinger: Thermodynamic modeling of oxidation of Al-Cr-Ni alloys, Journal of Alloys and Compounds, 381, 99-113 (2004) [11] Outokumpu Research Oy, HSC Chemistry 5.11