scholarly journals Evolution of the Microstructure of the Copper Alloy (DIN-ECu-57) in the Deformation Zone in the Process of Pressing Conform

2018 ◽  
Vol 918 ◽  
pp. 145-151
Author(s):  
Alexander V. Zinoviev ◽  
Alexander N. Koshmin ◽  
Alexander Y. Chasnikov
Keyword(s):  
Mechanical Properties ◽  
Cross Sections ◽  
Metal Forming ◽  
Deformation Zone ◽  
Copper Alloy ◽  
Copper Alloys ◽  
Metal Flow ◽  
Longitudinal Direction ◽  
Microstructure And Mechanical Properties ◽  
Continuous Extrusion

The process of continuous extrusion Conform, relating to modern energy-efficient metalworking technologies, is now widespread in the production of hollow and solid long-cut profiles of various cross-sections made of aluminum and copper alloys. However, in questions relating to the metal flow pattern and the formation of microstructure and mechanical properties, directly at the deformation zone, it has not studied sufficiently [1]. The work aimed at studying the nature of the metal flow and the transformation of the microstructure and mechanical properties of the copper alloy GOST-M1 (DIN-ECu-57) in the deformation zone during the pressing of round (Ø 8, 24, 30 mm) and flat (10 × 30, 10 × 60, 10 × 80, 10 × 100 mm) profiles. It was performed on the basis of New Metallurgical Technologies Ltd. and the department of metal forming of the NUST MISiS. In the pressing process, the templates of these profiles were selected, further samples for experiment were made and the study of the nature of the alloy flow in the longitudinal direction were carried out (continuous casting - deformation center - finished profile).

scholarly journals Effect of deformation techniques on the microstructure and mechanical properties of a copper alloy

2021 ◽  
Vol 1014 (1) ◽  
pp. 012030
Author(s):  
A Morozova ◽  
A Pilipenko ◽  
M Tkachev ◽  
A Lugovskaya ◽  
A Belyakov ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Copper Alloy ◽  
Microstructure And Mechanical Properties

FEM Simulation of Copper Busbar Pressing on the Continuous Extrusion Line "CONFORM"

2018 ◽  
Vol 284 ◽  
pp. 547-551
Author(s):  
Georgy V. Shimov ◽  
Aleksandr Bogatov ◽  
D. Kovin
Keyword(s):  
Steady State ◽  
Deformation Zone ◽  
Metal Flow ◽  
Fem Simulation ◽  
Continuous Extrusion ◽  
3D Package ◽  
Deform 3D

Simulation using the DEFORM-3D package of the steady-state pressing mode of a copper busbar on the continuous extrusion line "Conform" was carried out. The nature of the metal flow in the deformation zone was studied. An analysis of the velocities of the metal flow in the prechamber was performed. It was shown that in the channel of the wheel there is pressing out, which negatively affects the quality of the finished busbars and can lead to such defects as "lamination".

Strength and Hardness Assessment of Copper and Copper Alloy Coatings on Stainless Steel Substrates

2016 ◽  
Author(s):  
Mohamed Ibrahim ◽  
Khaled Al-Athel ◽  
Abul Fazal M. Arif
Keyword(s):  
Mechanical Properties ◽  
Stainless Steel ◽  
Adhesion Strength ◽  
Copper Alloy ◽  
Steel Substrate ◽  
Copper Alloys ◽  
Pure Copper ◽  
Coating Materials ◽  
Coating Composition ◽  
The Cross

Coatings are extensively used in many areas including industrial and medical fields to serve various functions as corrosion resistance, wear resistance and antibacterial purposes. Copper and copper alloys are among the most widely applied coating materials for several industrial and medical applications. One of their widely used copper coating applications is in the antibacterial coating area. Most of the research done in this field focuses on the antibacterial behavior with no comprehensive assessment regarding their mechanical properties, such as hardness and adhesion strength. In this work, mechanical assessment of strength and hardness of pure copper and several copper alloys including Cu Sn5% P0.6%, Cu Ni18 Zn14 (German silver), and Cu Al9 Fe1 are studied experimentally and numerically. All coatings are deposited on stainless steel substrate disks of 25mm diameter by wire-arc thermal spraying at the center of advanced coating technologies, University of Toronto. All coatings are 150 microns in thickness, with two additional thicknesses up to 350 microns for Cu Ni18 Zn14 (German silver) and Cu Al9 Fe1. The effect of the coating thickness and composition on the mechanical properties is studied for all the copper and copper alloy samples with the varying thicknesses between 150 and 350 microns. Scanning Electron Microscope (SEM) is used to study the surface as well as the cross-sectional microstructure of the coatings. Vickers micro-indentation tests are used to evaluate hardness at various locations on the cross-section of the coating and the substrate. This is used to evaluate the effect of the deposition of the coating material, and the subsequent solidification, on the hardness of the coating layer as well as the substrate near the coating interface. Pull-off adhesion tests are performed to evaluate the effect of the coating composition and thickness on the strength of the coatings. Tests are carried out to compute the pull-off failure stress that causes the delamination between the coating and the substrate. Computational analysis will be used to calibrate the experimental data when available by means of finite element analysis. The preliminary pull-off tests show interesting results as the samples with lower coating thicknesses exhibit delamination at higher strengths. This is due to the increase in residual stresses in higher thicknesses building up during the deposition process. Some of the samples did not even fail at lower thicknesses of 150 microns. A comprehensive analysis between the adhesion strength and hardness will be very useful in understanding the effect of coating composition and thickness on the mechanical properties of the coating.

Microstructure and mechanical properties of additive manufactured copper alloy

2016 ◽  
Vol 179 ◽  
pp. 38-41 ◽  
Author(s):  
A. Popovich ◽  
V. Sufiiarov ◽  
I. Polozov ◽  
E. Borisov ◽  
D. Masaylo ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Copper Alloy ◽  
Microstructure And Mechanical Properties

Stereological Characterisation of Steel Wide Strip Microstructures

2005 ◽  
Vol 473-474 ◽  
pp. 207-212
Author(s):  
Zoltán Gácsi ◽  
Zsolt Csepeli
Keyword(s):  
Mechanical Properties ◽  
Production Technology ◽  
Cross Sections ◽  
Rolled Steel ◽  
Continuous Development ◽  
Wide Strip ◽  
Microstructure And Mechanical Properties ◽  
Image Analyser ◽  
The Relationship

The continuous development of steel products requires the detailed investigation of relationships between the production technology, microstructure, and mechanical properties. This paper describes the detailed characterisation of normalising rolled and of thermomechanically rolled steel wide strip microstructures and presents the relationship between their microstructures and their mechanical properties. The morphology of the microstructures were characterised by using an image analyser. The most important measured stereological parameters were the area, perimeter, length and breadth of the ferrite and pearlite cross-sections.

scholarly journals Development Of Lead Free Copper Alloy Casting; Mechanical Properties, Castability and Machinability

2018 ◽  
Vol 26 ◽  
pp. 34
Author(s):  
Umeda Takateru
Keyword(s):  
Mechanical Properties ◽  
Copper Alloy ◽  
Copper Alloys ◽  
Lead Free ◽  
Treatment Technology ◽  
Pouring Temperature ◽  
Alloy Casting ◽  
Tin Bronze ◽  
Alloy Castings ◽  
Better Than

The regulation for the lead discharge in the environment was strengthened, in Japan, the standards 0.01 mg/I or less has been in force from April 2003. In order to meet the new standard, two technologies for reduction of lead dissolution into the drinking water have been developed in Japan; substitution of lead free copper alloys for lead bearing bronze (JIS-CAC406) and introduction of surface treatment technology. This technological trend was shortly reviewed. For development of lead free copper alloy casting, mechanical properties, castability and machinability of various lead free alloy castings were examined. Trial alloys used were commercially available ones such as the lead free bronze containing Bi, the lead free bronze containing Bi-Se, the lead free bronze containing Bi-Sb and the lead free brass containing Si. Mechanical properties of alloys were dependent on the pouring temperature and castings thickness and were generally less than those of tin bronze castings (JIS-CAC406, Cu-5 wt% Sn-5 wt% Zn-5 wt% Pb). The machinability of the lead free bronze containing Bi and Se was better than that of the lead free bronze castings containing Bi and Bi-Sb. But was still 10 to 15 % less than that of JIS-CAC406. In a lead free alloy substituted by Bi, adjustment of tin, zinc and bismuth contents was attempted and in the Bi-Se system, the adequate adjustment, for bismuth and selenium contents and also for tin, zinc and bismuth contents, was attempted. New alloy in which the mechanical properties sufficiently satisfy the standard for JIS-CAC406 is developed.

scholarly journals Microstructure and mechanical properties of different keratinous horns

2018 ◽  
Vol 15 (143) ◽  
pp. 20180093 ◽  
Author(s):  
Yuchen Zhang ◽  
Wei Huang ◽  
Cheryl Hayashi ◽  
John Gatesy ◽  
Joanna McKittrick
Keyword(s):  
Mechanical Properties ◽  
Longitudinal Direction ◽  
Bighorn Sheep ◽  
Growth Direction ◽  
Ovis Aries ◽  
Domestic Sheep ◽  
Microstructure And Mechanical Properties ◽  
Mountain Goat ◽  
The Impact ◽  
Horn Core

Animal horns play an important role during intraspecific combat. This work investigates the microstructure and mechanical properties of horns from four representative ruminant species: the bighorn sheep ( Ovis canadensis ), domestic sheep ( Ovis aries ), mountain goat ( Oreamnos americanus ) and pronghorn ( Antilocapra americana ), aiming to understand the relation between evolved microstructures and mechanical properties. Microstructural similarity is found where disc-shaped keratin cells attach edge-to-edge along the growth direction of the horn core (longitudinal direction) forming a lamella; multiple lamellae are layered face to face along the impact direction (radial direction, perpendicular to horn core growth direction), forming a wavy pattern surrounding a common feature, the tubules. Differences among species include the number and shape of the tubules, the orientation of aligned lamellae and the shape of keratin cells. Water absorption tests reveal that the pronghorn horn has the largest water-absorbing ability due to the presence of nanopores in the keratin cells. The loading direction (compressive and tensile) and level of hydration vary among the horns from different species. The differences in mechanical properties among species may relate to their different fighting behaviours: high stiffness and strength in mountain goat to support the forces during stabbing; high tensile strength in pronghorn for interlocked pulling; impact energy absorption properties in domestic and bighorn sheep to protect the skull during butting. These design rules based on evolutionary modifications among species can be applied in synthetic materials to meet different mechanical requirements.

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