Weldability: Effect of Alloying Element Sc, Mn, and Zr on Alloys of the Al-Mg-Sc-Mn-Zr System

2019 ◽  
Author(s):  
V. I. Lukin
Keyword(s):  
Aluminum Alloys ◽  
Practical Importance ◽  
Strength Properties ◽  
Strength Characteristics ◽  
Mg Alloy ◽  
Alloying Element ◽  
Processing Properties ◽  
Alloys Of The Al ◽  
Effect Of Alloying

Scandium in aluminum alloys behaves as the most efficient modifier of the structure of the material and as an agent suppressing recrystallization. This unique behavior of scandium in alloys of the Al-Mg system greatly increases the strength characteristics, whilst retaining on a higher level the ductility and processing properties of deformed semi-finished products. This article describes the effect of complex alloying the Al-6.3% Mg alloy with scandium, manganese and zirconium on the weldability and strength properties of the material is of considerable scientific and practical importance.Investigations.

The Effect of Alloying Elements on Thermal Conductivity of Aluminum Alloys in High Pressure Die Casting

2013 ◽  
Vol 813 ◽  
pp. 175-178 ◽  
Author(s):  
Cheol Woo Kim ◽  
Jae Ik Cho ◽  
Se Weon Choi ◽  
Young Chan Kim
Keyword(s):  
Thermal Conductivity ◽  
Aluminum Alloys ◽  
Die Casting ◽  
Pure Aluminum ◽  
High Thermal Conductivity ◽  
Alloying Elements ◽  
Alloying Element ◽  
Casting Alloys ◽  
Pressure Die Casting ◽  
Effect Of Alloying

Recently, demand of aluminum alloys for manufacturing in components with high thermal conductivity application increases. However, the most aluminum die casting alloys exhibit very lower thermal properties, about only a half of pure aluminum. In die casting alloys, alloying elements are essential to obtain sufficient fluidity and mechanical strength, therefore, in this study, the effect of alloying elements, Si, Cu, Mg, Fe and Mn, on thermal conductivity, die casting characteristics and mechanical properties were analyzed and the appropriate amount of each alloying element were investigated. The results showed that Mn had the most deleterious effect in thermal conductivity and Si and Fe contents were important to improve fluidity and strength. The alloy with 1.5~2.0wt.%Si and 0.6wt.%Fe showed very good combination of high thermal conductivity and sufficient casting characteristics.

Effect of alloying with nitrogen on the long-term strength characteristics of welded joints in molybdenum-based alloys

1983 ◽  
Vol 15 (10) ◽  
pp. 1476-1481
Author(s):  
I. S. Tsvilyuk ◽  
E. P. Polishchuk ◽  
A. N. Badaev ◽  
D. S. Avramenko
Keyword(s):  
Welded Joints ◽  
Strength Characteristics ◽  
Term Strength ◽  
Alloying With Nitrogen ◽  
Effect Of Alloying

Study of the Structure and Properties of Especially Strong Aluminum Alloys of the Al–Zn–Mg–Cu System

Metallurgist ◽  
2017 ◽  
Vol 60 (9-10) ◽  
pp. 978-982 ◽  
Author(s):  
O. G. Senatorova ◽  
A. V. Bronz ◽  
V. V. Cheverikin ◽  
A. V. Somov ◽  
N. E. Blinova
Keyword(s):  
Aluminum Alloys ◽  
Structure And Properties ◽  
Alloys Of The Al

Acoustic-Emission Diagnostics of the Fatigue Fracture of Aluminum Alloys of the Al–Zn–Mg–Cu System

2016 ◽  
Vol 51 (5) ◽  
pp. 747-751
Author(s):  
V. R. Skal’s’kyi ◽  
I. Ya. Dolins’ka ◽  
M. O. Rudak ◽  
V. K. Opanasovych
Keyword(s):  
Acoustic Emission ◽  
Aluminum Alloys ◽  
Fatigue Fracture ◽  
Alloys Of The Al

General concept of determining the parameters of non-mining walls of ultra-deep diamond deposits development open pits

2021 ◽  
pp. 48-53
Author(s):  
I. V. Zyryanov ◽  
A. N. Akishev ◽  
I. B. Bokiy ◽  
N. M. Sherstyuk
Keyword(s):  
Rock Mass ◽  
Structural Relaxation ◽  
Slope Angle ◽  
Field Tests ◽  
Friction Angle ◽  
Strength Properties ◽  
Strength Characteristics ◽  
Open Pit ◽  
Open Pit Mining ◽  
Relaxation Coefficient

A specific feature of open pit mining of diamond deposits in Western Yakutia is the construction of the open pits in the zone of negative ambient temperatures, which includes thick permafrost rock mass, and which is at the same time complicated by the influence of cryogenic processes on deformation of pit wall benches. The paper presents the comparative analysis of strength characteristics in frozen and thawed rocks, stability of benches during mining, the general geomechanical approach to the determination of parameters of non-mining walls of the ultra-deep open pit diamond mines, and the parameters of nonmining walls and benches. Optimization of open pit wall configuration should primarily be based on the maximum utilization of the strength properties of frozen rocks in combination with the development of new approaches, calculation schemes and methods for assessing stability of open pit walls and benches of unconventional design, including the non-mining vertical benches. The main design characteristic that determines the parameters of open pit walls is the structural tectonic relaxation coefficient, which specifies the calculated value of cohesion in rock mass. For the diamond deposits, the values of the structural relaxation coefficient were obtained in a series of field tests and back calculations. Full-scale tests were carried out both during exploration operations in underground mines and in open pits. The accuracy of determining the values of the structural relaxation coefficient in the range of 0.085–0.11 is confirmed by the parameters of non-mining walls in an open pit mine 385–640 m deep, with overall slope angles of 38–55° and a steeper H 0.35–0.5 lower part having the slope angle of up to 70° with average strength characteristics of 7.85–11.84 MPa and the internal friction angle of 28.1–37.4°. Using the natural load-bearing capacity of rock mass to the full advantage, which the values of the structural relaxation coefficient of deposits show, allows optimization of open pit wall slope design and minimization of stripping operations.

scholarly journals CORROSION OF GALVANIZED STEEL AND ALUMINUM ALLOYS IN THE INDUSTRIAL ENVIRONMENT OF CHAMPIGNON

2019 ◽  
Vol 4 (5) ◽  
pp. 50-55
Author(s):  
С. Иконников ◽  
S. Ikonnikov ◽  
А. Блажнов ◽  
A. Blazhnov
Keyword(s):  
Aluminum Alloys ◽  
Penetration Rate ◽  
Galvanized Steel ◽  
Layer By Layer ◽  
Test Results ◽  
Structural Scheme ◽  
Construction Design ◽  
Alloys Of The Al ◽  
Rational Type ◽  
Selection Of

Generalization the experience building for the cultivation of champignons shows the diversity of construction solutions. The method of layer-by-layer assembly with galvanized steel and aluminum alloy coverings is economically feasible to use in champignons of frame structural scheme, enclosing structures of industrial premises. However, the technologically required wet air conditions of the premises and aggressive gases during construction design complicate the selection of a rational type of outer layers of enclosing structures. To reveal the rational material of coverings in the production premises of champignons, corrosion tests are carried out on samples of aluminum alloys of the Al-Mg, Al-Mn, Al-Mg-Si systems, technical aluminum, galvanized steel and galvanized steel with a protective coating. The type and corrosion penetration rate are set for the exposed samples. According to the test results, suitable covering materials for various types of champignon production premises are determined

scholarly journals Research of the properties of rubber-cord composites in the presence of new adhesion promoters

2020 ◽  
Vol 82 (3) ◽  
pp. 221-226
Author(s):  
O. V. Karmanova ◽  
S. G. Tikhomirov ◽  
E. V. Lintsova ◽  
L. V. Popova
Keyword(s):  
Elevated Temperatures ◽  
Tensile Elongation ◽  
Physical And Mechanical Properties ◽  
Cobalt Content ◽  
Strength Properties ◽  
Adhesion Promoters ◽  
Serial Sample ◽  
Rubber Compounds ◽  
The Cost ◽  
Processing Properties

Studies of experimental adhesion modifiers based on a mixture of fatty acids from the production of light vegetable oils. The properties of rubber compounds and their vulcanizates obtained using experimental adhesion promoters KK with cobalt content from 7.5 to 16.5% are investigated. The plastic-elastic and vulcanization properties of the properties of breaker rubber compounds based on polyisoprene, the physical and mechanical properties of breaker rubbers and the bond strength in the “rubber-brass-plated steel cord system” were studied. When testing belt rubbers containing experienced adhesion promoters or an imported analog of Manobond 680C, the following features were revealed. The plasticity of the prototypes was in the range of 0.2-0.4. This indicates satisfactory processing properties. The Mooney viscosity of the prototypes was lower than that of the production sample. The use of experienced adhesion promoters instead of the analogue (Manobond 680C) increases the resistance to scorching. On the basis of the analysis of elastic-strength properties, it was found that in terms of the conditional tensile strength, the prototypes were inferior to the serial ones. However, rubbers containing the KK-12, KK-13.5, KK-15 promoters met the control standards. The tensile elongation at break of the experimental rubbers is higher than that of the serial sample. This may indicate the formation of a more uniform cure network in the presence of the test products. When testing rubber-metal-hard composites, it was noted that, under normal conditions, the experienced adhesion promoters have advantages over Manobond 680C. However, at elevated temperatures, under conditions of salt and steam-air aging, they are slightly inferior to Manobond 680C. It has been established that the experimental adhesion promoters provide the required set of technical properties of belt rubbers with a CO2 + content of 12–16.5% wt. Thus, it is possible to recommend the adhesion promoters KK 12, KK-13.5, KK 15 for practical use in the composition of belt rubber compounds. This will allow replacing a foreign-made product and reducing the cost of production.

scholarly journals Анализ скоростных зависимостей критических напряжений в алюминиевых сплавах системы Al-Mg при ударных нагрузках

2020 ◽  
Vol 62 (11) ◽  
pp. 1749
Author(s):  
А.Д. Евстифеев ◽  
И.В. Смирнов ◽  
Ю.В. Петров
Keyword(s):  
Corrosion Resistance ◽  
Aluminum Alloys ◽  
Strain Rate ◽  
Slight Reduction ◽  
Dynamic Stresses ◽  
Good Ductility ◽  
Critical Stresses ◽  
Critical Dynamic ◽  
Strain Rate Loading ◽  
Alloys Of The Al

Aluminum alloys of the Al-Mg system are widely used in automotive and aviation industries due to their combination of strength, good ductility and corrosion resistance. Increasing the percentage of magnesium leads to higher strength of the material with a slight reduction of ductility. Behavior of critical stresses in materials were studied under variable strain rate loading conditions. The possibility to predict critical dynamic stresses of materials based on a structural-time approach is discussed.

scholarly journals Effect of Alloying Element on Age-Hardening Characteristic of Mo-V Added Low Carbon Steel

DENKI-SEIKO ◽  
2008 ◽  
Vol 79 (1) ◽  
pp. 61-67 ◽  
Author(s):  
Kazuyoshi Kimura ◽  
Katsunori Takada ◽  
Makoto Hobo
Keyword(s):  
Carbon Steel ◽  
Low Carbon Steel ◽  
Age Hardening ◽  
Low Carbon ◽  
Alloying Element ◽  
Effect Of Alloying
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