Physical modifying effects and their influence on the crystallization of casting alloys

Selyanin, I. F.; Деев, В. Б.; Белов, Н. А.; Prikhodko, O. G.; Ponomareva, K. V.

doi:10.3103/s1067821215040197

Cited by 15 publications

(3 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…In recent years the attention of researchers in the field of physical materials science is concentrated on the analysis of nature of metals' and alloys' hardening under the action of the external energy influences and concentrated flows of energy [10][11][12][13][14][15] . The promising field of development is a combination of several methods of modification.…”

Section: Introductionmentioning

confidence: 99%

Effect of Electron-Plasma Treatment on the Microstructure of Al-11wt%Si Alloy

et al. 2020

View full text Add to dashboard Cite

The analysis of structure, defect substructure, elemental and phase compounds and friction properties of Al-11wt%Si alloy surface layer of subjected to complex treatment was carried out by methods of scanning and transmission electron microscopy. Complex treatment includes the electroexplosion influence by Al-Y 2 O 3 compound and subsequent electron beam irradiation. The surface layer ≈ 80 μm thick is formed by high-velocity crystallization cells of 0.8-1.3 μm in dimension. Interlayers 50-75 nm thick located along the cells of high-velocity crystallization are enriched by atoms of silicon and yttrium. Complex surface treatment leads to the increase by 18 times in wear resistance and decrease by 1.6 times in the friction factor of the modified layer.

show abstract

Section: Introductionmentioning

confidence: 99%

Effect of Electron-Plasma Treatment on the Microstructure of Al-11wt%Si Alloy

et al. 2020

View full text Add to dashboard Cite

show abstract

“…Such influences promote the formation of a fine-grained structure and increase the mechanical and operational properties of castings without the addition of special modifying additives. The main advantage of physical influences is that they do not change the chemical composition of the melt and do not lead to the accumulation of undesirable impurities in casting alloys during further remelting [5]. The use of certain types of physical influences allows the use of an increased amount of secondary materials during melting without loss of quality of the resulting alloy [6].…”

Section: Introductionmentioning

confidence: 99%

Physical Methods of Melt Processing at Production of Aluminum Alloys and Composites: Opportunities and Prospects of Application

Деев

Прусов

Rakhuba

2019

MSF

View full text Add to dashboard Cite

The paper describes the advantages and prospects of using the physical methods of melts processing in the production of aluminum alloys and cast aluminum matrix composites. Classification of the physical methods of the melt processing by the state of metal during the processing period and by the physical principle of the imposed effects is proposed. The influence of physical processing of melts on the structure of aluminum matrix composites depending on the type of imposed influence and the origin of the reinforcing phases is shown. The positive effect of thermo-temporal treatment on the structure of materials was confirmed on example of in-situ composites of Al-Mg2Si system, it includes reduction in the average size of endogenous reinforcing phases and changing their morphology to a more compact.

show abstract

“…Следует отметить, что перегрев алюминиевых расплавов, содержащих кремний, является эффективным способом модифицирования литой структуры [22].…”

Section: Introductionunclassified

Study Into Structure and Properties of Solders Based on Aluminum and Zinc in the Form of Small-Section Cast Bars

Никитин

Timoshkin

Никитин

2018

Izv.VUZ. Tsvet. Met.

View full text Add to dashboard Cite

The study covers Al–Cu–Si (A34 grade) and Zn–Al–Cu (Welco52 grade) solders. It is found that A34 solder (Al–28%Cu–6%Si) melts and crystallizes in a narrow range of temperatures (~18 °C). Solidus and liquidus temperatures of A34 solder are ~508 °С and ~526 °С, respectively. Zn–Al–Cu (Zn–4%Al–2,5% Cu) solder has a eutectic composition, so it melts and crystallizes at a constant temperature of ~389 °С. Densities of investigated solders in their liquid and solid states are studied. A34 solder has a density of 3,02 and 3,32 g/cm3 , respectively. Zinc solder density is 6,28 g/cm3 in the liquid state, and 6,69 g/cm3 in the solid state. The influence of casting conditions on the structure of cast alloys in the form of bars with cross sections of 13, 10, and 5 mm2 was investigated. Main structural components of solder alloys reduce in size as cross sections decrease. The aluminium-based solid solution dendrites and CuAl2 phase are reduced in the A34 solder microstructure. In zinc solders, the most severely reduced ones are zinc-based solid solution dendrites. The best castability is observed in melts obtained from 5 mm2 section bar solders with studied sample gaps of 2,0, 1,5 and 1,0 mm. Eutectic zinc solder features better castability in comparison with A34: castability of the melt obtained from the 5 mm2 section zinc solder rod with a sample gap width of 2,0 mm is 100 % (for A34 melt solder obtained from a rod of the same cross section it was 98 %). Experiments on soldering AK12 alloy plates and 3003 alloy sheets demonstrated that there is a tight border in the solder/base material system and no any defects such as pores or unsoldered areas. There was a slight interpenetration of solder alloys into base materials, especially when soldering AK12 cast plates.

show abstract

Physical modifying effects and their influence on the crystallization of casting alloys

Cited by 15 publications

References 1 publication

Effect of Electron-Plasma Treatment on the Microstructure of Al-11wt%Si Alloy

Effect of Electron-Plasma Treatment on the Microstructure of Al-11wt%Si Alloy

Physical Methods of Melt Processing at Production of Aluminum Alloys and Composites: Opportunities and Prospects of Application

Study Into Structure and Properties of Solders Based on Aluminum and Zinc in the Form of Small-Section Cast Bars

Contact Info

Product

Resources

About