SIMA Processing of Cu34wt.%Zn2wt.%Pb Brass Alloy

2019 ◽  
Vol 285 ◽  
pp. 176-182
Author(s):  
Hamid Tavakkoli ◽  
Behzad Niroumand ◽  
Ahmad Rezaeian
Keyword(s):  
Shape Factor ◽  
Cold Working ◽  
Liquid Fraction ◽  
Simulation Software ◽  
Solid Particles ◽  
Holding Time ◽  
Semisolid Processing ◽  
Brass Alloy ◽  
Dendritic Microstructure ◽  
Cold Worked

Effects of SIMA processing on size and shape of primary solid particles of Cu34wt.%Zn2wt.%Pb brass alloy was investigated. The optimal temperature for semisolid processing of the alloy was found to be around 890 °C using Thermo-calc simulation software. Liquid fraction sensitivity of the alloy around this temperature is 0.012. The results indicated the formation of non-dendritic microstructure even after 1 min holding of 10% cold worked sample at 890 °C. Sphericity of the primary solid particles increased by increasing the cold working ratio and holding time. The smallest size (103 μm) and highest shape factor (0.84) of the primary solid particles were achieved at 30% cold working ratio and 5 min holding time.

MUELLER ALLOY 2700

Alloy Digest ◽  
1983 ◽  
Vol 32 (4) ◽  
Keyword(s):  
Corrosion Resistance ◽  
Physical Properties ◽  
Tensile Properties ◽  
Cold Working ◽  
Heat Treating ◽  
Good Resistance ◽  
Brass Alloy ◽  
Medium Strength ◽  
Copper Zinc ◽  
Cold Worked

Abstract MUELLER Alloy 2700 is a medium-strength copper-zinc (brass) alloy with good ductility. It has good resistance to corrosion and excellent cold-working characteristics. It can be cold worked by the conventional fabrication processes. Its many applications include products made from wire for automotive, electrical, architectural and hardware uses. This datasheet provides information on composition, physical properties, elasticity, and tensile properties. It also includes information on corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: Cu-456. Producer or source: Mueller Brass Company.

MUELLER ALLOY 2740

Alloy Digest ◽  
1983 ◽  
Vol 32 (12) ◽  
Keyword(s):  
Corrosion Resistance ◽  
Physical Properties ◽  
Tensile Properties ◽  
Cold Working ◽  
Heat Treating ◽  
Good Resistance ◽  
Brass Alloy ◽  
Medium Strength ◽  
Copper Zinc ◽  
Cold Worked

Abstract MUELLER ALLOY 2740 is a medium-strength copper-zinc (brass) alloy with good ductility and toughness. It has excellent cold-working characteristics and good resistance to corrosion. It can be cold worked by conventional processes and procedures. Mueller Alloy 2740 finds its chief use in plumbing brass goods and trap tube. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: Cu-468. Producer or source: Mueller Brass Company.

Microstructure Evolution of Mg-6Zn-6Al Magnesium Alloy during Semi-Solid Partial Remelting

2011 ◽  
Vol 306-307 ◽  
pp. 608-612
Author(s):  
Xiao Feng Huang ◽  
K. Feng ◽  
Y. Ma ◽  
F.Y Yan ◽  
Ti Jun Chen
Keyword(s):  
Solid State ◽  
Magnesium Alloy ◽  
Shape Factor ◽  
Solid Particles ◽  
Dendritic Microstructure ◽  
Partial Remelting ◽  
Semi Solid ◽  
Average Size ◽  
Microstructure Of The Material ◽  
Holding Temperature

A new magnesium alloy, named as Mg-6Zn-6Al(ZA66), using for thixoforming production has been developed. The microstructure of the material during partial remelting holding in the semi-solid state was characterized. The results indicate that non-dendrite microstructure in ZA66 magnesium alloy billets can be obtained, but the proper partial remelting temperature and holding time should be select. After being treated at 575°Cfor 20 min, the ZA66 alloys can obtain a non-dendritic microstructure with finer unmelted primary solid particles (37 μm) and shape factor about 0.6. With the increasing holding temperature from 575°C to 590°C,the average size of unmelted primary solid particles increases and globular tendency becomes more obvious.

ANACONDA ALLOY 268

Alloy Digest ◽  
1982 ◽  
Vol 31 (8) ◽  
Keyword(s):  
Corrosion Resistance ◽  
Physical Properties ◽  
Tensile Properties ◽  
Cold Working ◽  
Heat Treating ◽  
Zinc Alloy ◽  
Wide Range ◽  
Copper Zinc ◽  
Cold Worked

Abstract ANACONDA Alloy 268 is a copper-zinc alloy with excellent cold-working properties; it can be cold worked by all the conventional fabrication processes. Its corrosion resistance is excellent-to-good in most environments. This alloy has a wide range of applications including items such as springs, bathroom fixtures, automotive radiators, lamp sockets and sanitary traps. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fatigue. It also includes information on corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: Cu-442. Producer or source: Anaconda American Brass Company.

COPPER ALLOY No. 268

Alloy Digest ◽  
1976 ◽  
Vol 25 (2) ◽  
Keyword(s):  
Corrosion Resistance ◽  
Copper Alloy ◽  
Cold Working ◽  
Heat Treating ◽  
Zinc Alloy ◽  
Good Resistance ◽  
Wide Range ◽  
Copper Zinc ◽  
The Common ◽  
Cold Worked

Abstract Copper Alloy No. 268 is a copper-zinc alloy with excellent cold-working properties and good resistance to corrosion. It can be cold worked by all the common fabrication processes and has a wide range of applications. This datasheet provides information on composition, physical properties, hardness, elasticity, tensile properties, and shear strength as well as fatigue. It also includes information on corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: Cu-306. Producer or source: Brass mills.

Formation Mechanism of Thixotropic Microstructure of AM60 Alloy during Solidification

2014 ◽  
Vol 1030-1032 ◽  
pp. 86-89
Author(s):  
Bo Xing
Keyword(s):  
Formation Mechanism ◽  
Solid Substrate ◽  
Research Field ◽  
Primary Phase ◽  
Solid Particles ◽  
Metallographic Analysis ◽  
Semisolid Slurry ◽  
Dendritic Microstructure ◽  
Quenching Method ◽  
Semi Solid

A research field on semi-solid metal processing is the preparation of semi-solid slurry with non-dendritic microstructure. Nowadays, with the technological innovation of semi-solid slurry preparation, people turn to produce the non-dendritic semisolid microstructure by locally cooling of the alloy melt during solidification. Therefore, it is necessary to investigate the formation mechanism of the non-dendritic microstructure formation because the primary phase undergoes a specially controlled nucleation and growth which distinctly different from the commom solidification. In this paper, the semisolid slurry of AM60 alloy was produced by Self-Inoculation Method (SIM), and the microstructure evolution of primary α-Mg was investigated by water quenching method and metallographic analysis. The results indicate that the semisolid microstructure of AM60 alloy produced by SIM composed of small and globular α-Mg particles, and these grains undergone a coarsing process during quiescent holding. The solid substrate caused by the fusion of solid particles and the dendritic fragments caused by melt flow caused the grain multiplication, and then the grain undergone a steadily growth because of the uniform temperature distribution, resulting in the increase of grains density and a small grain size of the AM60 semisolid slurry.

Erosion Mechanism and Sensitivity Parameter Analysis of Natural Gas Curved Pipeline

2019 ◽  
Vol 141 (3) ◽  
Author(s):  
Jie Zhang ◽  
Hao Yi ◽  
Zhuo Huang ◽  
Jiadai Du
Keyword(s):  
Natural Gas ◽  
Wear Rate ◽  
Shape Factor ◽  
Great Influence ◽  
Solid Particles ◽  
Parameter Analysis ◽  
Particle Collision ◽  
Erosion Wear ◽  
Gas Wells ◽  
The Impact

With the deepening of natural gas exploitation, the problem of sand production in gas wells is becoming more and more serious, especially in high-yield gas wells. The solid particles in natural gas are very likely to cause erosion and wear of downstream pipelines and throttling manifolds, which makes the pipeline ineffective. Once the pipeline is damaged, the natural gas leaks, which may cause serious catastrophic accidents. In this paper, the impact of sand particles on the pipeline wall is predicted by the analysis of the research on bent and continuous pipeline combined with particle collision model. The parameters of different particles (particle shape factor, particle velocity, and particle diameter), different bent parameters (angle, diameter, and curvature-to-diameter ratio), and the influence of different continuous pipeline parameters (assembly spacing and angle) are explored on the erosion and wear mechanism of curved pipeline. The results show that the shape of the particles has a great influence on the wear of the curved pipeline. As the shape factor of the particles decreases, the wear tends to decrease. The bent area is subject to erosion changes as the particle parameters and piping parameters. The increase in pipeline diameter is beneficial to reduce the maximum and the average erosion wear rate. When the bent angle of the pipeline is less than 90 deg, the maximum erosion wear rate is basically the same. But when it is greater than 90 deg, it decreases with the increase in the bent angle. When the assembly angle of double curved pipeline is between 0 deg and 60 deg, the elbow is subject to severe erosion wear. At the same time, increasing the assembly spacing is beneficial to reduce the erosion wear rate. The research can provide a theoretical support for subsequent engineering applications.

scholarly journals A Study on Strain Aging of Cold Worked Structural Steel and Allowable Cold Working Radius.

1997 ◽  
pp. 153-162 ◽  
Author(s):  
Koji Homma ◽  
Chitoshi Miki ◽  
Isao Soya ◽  
Hideya Sasao ◽  
Taketo Okumura ◽  
...  
Keyword(s):  
Structural Steel ◽  
Strain Aging ◽  
Cold Working ◽  
Cold Worked

Foundry Technique Designing of the Large Scale Thin-Section Casting

2011 ◽  
Vol 121-126 ◽  
pp. 325-329
Author(s):  
Bin Feng He
Keyword(s):  
Numerical Simulation ◽  
Aluminum Alloy ◽  
Thin Section ◽  
Large Scale ◽  
Liquid Fraction ◽  
Simulation Software ◽  
Pressure Casting ◽  
Counter Pressure ◽  
Shrinkage Defects ◽  
Filling And Solidification

The FDM numerical simulation software View Cast system was employed to the counter-pressure casting of aluminum alloy large-scale thin-section casting. By analyzing the mold filling and solidification, the distribution of liquid fraction, temperature field were studied. The potential shrinkage defects were predicted to be formed at the top of the casting. A solution towards reducing such defects has been presented. The feeding capacity of the riser was improved. Analysis on the shrinkage proved that the improved riser is an effective method for reduction of defects.

MICROSTRUCTURAL CHANGES OF ALUMINIUM ALLOY A319 ON COOLING SLOPE PLATE

2016 ◽  
Vol 78 (6-9) ◽  
Author(s):  
Ahmad Muhammad Aziz ◽  
Mohd Zaidi Omar ◽  
Zainuddin Sajuri ◽  
Mohd Shukor Salleh
Keyword(s):  
Grain Size ◽  
Shape Factor ◽  
Casting Process ◽  
Impact Zone ◽  
Dendritic Microstructure ◽  
Size And Shape ◽  
Cooling Slope ◽  
Grain Size And Shape ◽  
Bottom Zone ◽  
The Impact

The cooling slope (CS) casting process is one of the simplest methods for producing a non-dendritic microstructure. To more clearly determine how this microstructure is formed, specifically in A319, requires an examination of how the dendritic microstructure evolves along the entirety of the CS plate. Yet until now, there are still unclear on the verification of microstructures changes on the CS plate. Based on experimental results, this paper offers an explanation for the mechanism involved in producing a nearly globular microstructure in A319. In addition, the mechanism is verified by using the planimetry method. Moreover a quantitative method is used to determine the grain size and shape factor to provide further support for the proposed mechanism. The solid fraction of α-Al at the impact zone is 70 % which is the highest compared to other zones. Grain size and shape factor shown a decreasing and increasing value respectively from the impact zone until the bottom zone.

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