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.

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.

Evaluation of melt quality of lead free copper alloy castings using cooling curve

2008 ◽  
Vol 21 (1-4) ◽  
pp. 144-147
Author(s):  
T. Okane ◽  
S. Mawin ◽  
S. Wantanee ◽  
P. Suvanchai ◽  
T. Fujii ◽  
...  
Keyword(s):  
Copper Alloy ◽  
Lead Free ◽  
Cooling Curve ◽  
Alloy Castings

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).

Evaluation of Mechanical Properties and Finite Element Modeling in Friction Stir Welding of C12200 Copper Alloy to C36000 High-Leaded Brass Pipe

2020 ◽  
Vol 38 (8A) ◽  
pp. 1106-1116
Author(s):  
Ahmed A. Akber ◽  
Ali A. Khleif ◽  
Abbas N. Hasein
Keyword(s):  
Mechanical Properties ◽  
Finite Element ◽  
Friction Stir Welding ◽  
Finite Element Modeling ◽  
Copper Alloy ◽  
Rotation Speed ◽  
Copper Alloys ◽  
Friction Stir ◽  
Element Modeling ◽  
Zero Degree

In systems transporting fluids like petrol, water, or any fluids. Copper and brass pipes are used because of the capability to resist corrosion. The copper alloys can be welded by several methods like arc, resistance, friction welding, and gas methods and they can be readily soldered and brazed. In the present study, mechanical properties and finite element modeling evaluation for friction stir welding of two dissimilar pipes (C12200 copper alloy pipe with C36000 copper alloy pipe). During this study six parameters were used where rotation speed of (775,1000,1300 and1525rpm), welding speed of 1.7 mm/min, axial force of 8.5KN, with a CW direction of rotation, and zero degree of tilt angle, using a threaded cone geometry of the tool. The results showed that the best weld quality was in case when the speed of rotation was 1525 rpm. 

scholarly journals The Influence of Nickel and Tin Additives on the Microstructural and Mechanical Properties of Al-Zn-Mg-Cu Alloys

2014 ◽  
Vol 2014 ◽  
pp. 1-10 ◽  
Author(s):  
Haider T. Naeem ◽  
Kahtan S. Mohammed ◽  
Khairel R. Ahmad ◽  
Azmi Rahmat
Keyword(s):  
Mechanical Properties ◽  
Aluminum Alloys ◽  
Base Alloy ◽  
Copper Alloys ◽  
Aging Treatment ◽  
Alloying Element ◽  
Cu Alloys ◽  
Different Temperatures ◽  
Retrogression And Reaging ◽  
Better Than

The effects of nickel and nickel combined tin additions on mechanical properties and microstructural evolutions of aluminum-zinc-magnesium-copper alloys were investigated. Aluminum alloys containing Ni and Sn additives were homogenized at different temperatures conditions and then aged at 120°C for 24 h (T6) and retrogressed at 180°C for 30 min and then reaged at 120°C for 24 h (RRA). Comparison of the ultimate tensile strength (UTS) of as-quenched Al-Zn-Mg-Cu-Ni and Al-Zn-Mg-Cu-Ni-Sn alloys with that of similar alloys which underwent aging treatment at T6 temper showed that gains in tensile strengths by 385 MPa and 370 MPa were attained, respectively. These improvements are attributed to the precipitation hardening effects of the alloying element within the base alloy and the formation of nickel/tin-rich dispersoid compounds. These intermetallic compounds retard the grain growth, lead to grain refinement, and result in further strengthening effects. The outcomes of the retrogression and reaging processes which were carried on aluminum alloys indicate that the mechanical strength and Vickers hardness have been enhanced much better than under the aging at T6 temper.

COPPER ALLOY No. C90500

Alloy Digest ◽  
1982 ◽  
Vol 31 (2) ◽  
Keyword(s):  
Mechanical Properties ◽  
Fracture Toughness ◽  
Compressive Strength ◽  
Corrosion Resistance ◽  
Copper Alloy ◽  
Heat Treating ◽  
Good Combination ◽  
Zinc Alloy ◽  
Tin Bronze ◽  
Mechanical Properties And Corrosion

Abstract Copper Alloy no. C90500 is a cast copper-tin-zinc alloy known also by names formerly used (not recommended): Gun Metal, 210, Tin Bronze and 88-10-0-2. It has a good combination of strength and resistance to corrosion. Because of its mechanical properties and corrosion resistance, it is used frequently in castings that are subjected to liquid or gas pressure, such as those in valves, pumps, etc. It also is used for bearings and gears. This datasheet provides information on composition, physical properties, hardness, elasticity, tensile properties, and compressive strength as well as fracture toughness and fatigue. It also includes information on corrosion resistance as well as casting, heat treating, machining, and joining. Filing Code: Cu-432. Producer or source: Copper alloy foundries.

The Influence of the Pressure on the Solidification of Zinc Alloy

2011 ◽  
Vol 287-290 ◽  
pp. 974-977
Author(s):  
Ying Zhang ◽  
Guo Rui Jia ◽  
Xian Jiao Xie ◽  
Shui Sheng Xie ◽  
De Fu Li ◽  
...  
Keyword(s):  
Experimental Data ◽  
Mechanical Properties ◽  
Copper Alloy ◽  
Zinc Alloy ◽  
Nitrogen Stress ◽  
Mold Surface ◽  
Experimental Conditions ◽  
Alloy Casting ◽  
Casting Quality

In order to optimize the casting methods of zinc alloy, which was the replacement of copper alloy materials in the future, we tried our best to improve the solidified form and mechanical properties of zinc alloy casting quality. From the experimental conditions on the existing basis, in the zinc alloy solidifying process, the pressure values ranging from 0.1 ~ 1.0Mpa nitrogen stress management were carried out on alloy solidification .After the cooling ,we had the casting sample comparison macro observed and tensile experimental data analyzed. The results showed that: when the pressure was increased to 1.0Mpa, the macro-organization of the zinc alloy achieved the best, and the degree of shrinkage and pores on the outer surface of the metal were smallest. The mold surface was more smooth, and the number of stomata reduced . The quality of the internal organization could be preliminarily judged by the analysis and observation on the zinc alloy appearance.

The Production of Copper Alloys in Iron Age Britain

1996 ◽  
Vol 62 ◽  
pp. 399-421 ◽  
Author(s):  
D.B. Dungworth
Keyword(s):  
Bronze Age ◽  
Iron Age ◽  
Analytical Method ◽  
Copper Alloy ◽  
Copper Alloys ◽  
Roman Period ◽  
Late Bronze Age ◽  
Tin Bronze ◽  
Quantitative Analyses ◽  
Selection Of

This paper presents a selection of compositional analyses of Iron Age copper alloy artefacts from northern Britain. The results were obtained as part of a larger project which examined Iron Age and Roman copper alloys in northern Britain (the region from the Trent-Mersey to the Forth-Clyde). The quantitative analyses were carried out using EDXRF on drilled or polished samples. Comparisons are made with results from the late Bronze Age and early Roman period in northern Britain. The results are also compared with those already published from a range of Iron Age sites in southern England. The large total number of copper alloy analyses from the British Iron Age has made possible a synthesis of the data which has largely been assembled piecemeal. It is now clear that a tin bronze was the principal copper alloy for much of the Iron Age. The composition of this alloy is distinct from the alloys used in the Late Bronze Age and during the Roman period although there is considerable ‘blurring’ at the transitions. A brief outline of the analytical method employed and the analytical results are included.

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