scholarly journals Experimentation Investigation of Hard facing Layer by MMAW on Alloy Steel

2022 ◽  
Vol 10 (1) ◽  
pp. 367-375
Author(s):  
Pooja Rani
Keyword(s):  
Alloy Steel ◽  
Abrasion Resistance ◽  
Impact Resistance ◽  
Metal Part ◽  
Product Selection ◽  
Wear Factor ◽  
Metal Parts ◽  
Gradual Decay ◽  
Initial Focus ◽  
End Results

Abstract: The wearing of metal parts might be defined as a gradual decay or breakdown of the metal. When a part becomes so deformed that it cannot perform adequately, it must be replaced or rebuilt. While the end results of wear are similar, the causes of wear are different. It is essential to understand the wear factors involved before making a hard surfacing product selection. It would be easy to select a surfacing alloy if all metal components were subjected to only one type of wear. However, a metal part is usually worn by combinations of two or more types of wear. This makes an alloy selection considerably more complicated. A hard surfacing alloy should be chosen as a compromise between each wear factor. The initial focus should centre on the primary wear factor and then the secondary wear factor(s) should be examined. For example: upon examining a worn metal part, it is determined that the primary wear factor is abrasion and the secondary wear factor is light impact. The surfacing alloy chosen should have very good abrasion resistance but also have a fair amount of impact resistance. Keywords: Welding, Hard Facing Electrodes, Alloys, Afrox 300.

AIRVAN

Alloy Digest ◽  
1965 ◽  
Vol 14 (12) ◽  
Keyword(s):  
Physical Properties ◽  
Tensile Properties ◽  
Alloy Steel ◽  
Abrasion Resistance ◽  
Heat Treating

Abstract AIRVAN is an air-hardening alloy steel possessing excellent non-deforming properties. It is particularly adapted to applications requiring toughness and fairly high abrasion resistance. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on forming, heat treating, machining, and joining. Filing Code: TS-172. Producer or source: Firth Sterling Inc..

scholarly journals The homogenous alternative to biomineralization: Zn- and Mn-rich materials enable sharp organismal “tools” that reduce force requirements

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
R. M. S. Schofield ◽  
J. Bailey ◽  
J. J. Coon ◽  
A. Devaraj ◽  
R. W. Garrett ◽  
...  
Keyword(s):  
Abrasion Resistance ◽  
Energy Savings ◽  
Impact Resistance ◽  
Atom Probe ◽  
Nanometer Scale ◽  
Time Loss ◽  
Protein Residues ◽  
Mandibular Teeth ◽  
First Time ◽  
Measured Hardness

AbstractWe measured hardness, modulus of elasticity, and, for the first time, loss tangent, energy of fracture, abrasion resistance, and impact resistance of zinc- and manganese-enriched materials from fangs, stings and other “tools” of an ant, spider, scorpion and nereid worm. The mechanical properties of the Zn- and Mn-materials tended to cluster together between plain and biomineralized “tool” materials, with the hardness reaching, and most abrasion resistance values exceeding, those of calcified salmon teeth and crab claws. Atom probe tomography indicated that Zn was distributed homogeneously on a nanometer scale and likely bound as individual atoms to more than ¼ of the protein residues in ant mandibular teeth. This homogeneity appears to enable sharper, more precisely sculpted “tools” than materials with biomineral inclusions do, and also eliminates interfaces with the inclusions that could be susceptible to fracture. Based on contact mechanics and simplified models, we hypothesize that, relative to plain materials, the higher elastic modulus, hardness and abrasion resistance minimize temporary or permanent tool blunting, resulting in a roughly 2/3 reduction in the force, energy, and muscle mass required to initiate puncture of stiff materials, and even greater force reductions when the cumulative effects of abrasion are considered. We suggest that the sharpness-related force reductions lead to significant energy savings, and can also enable organisms, especially smaller ones, to puncture, cut, and grasp objects that would not be accessible with plain or biomineralized “tools”.

Correlating microstructural features and mechanical properties with abrasion resistance of a high strength low alloy steel

Wear ◽  
2003 ◽  
Vol 254 (1-2) ◽  
pp. 120-128 ◽  
Author(s):  
A.K. Jha ◽  
B.K. Prasad ◽  
O.P. Modi ◽  
S. Das ◽  
A.H. Yegneswaran
Keyword(s):  
Mechanical Properties ◽  
Alloy Steel ◽  
Abrasion Resistance ◽  
High Strength ◽  
Low Alloy Steel

scholarly journals Abrasion Resistance, Flexural Toughness and Impact Resistance of Rubberized Concrete

2020 ◽  
Vol 9 (3) ◽  
pp. 1032-1038
Keyword(s):  
Abrasion Resistance ◽  
Cement Content ◽  
Impact Resistance ◽  
Crumb Rubber ◽  
Rubberized Concrete ◽  
Replacement Level ◽  
Rubber Content ◽  
Flexural Toughness ◽  
Water To Cement Ratio ◽  
Natural Aggregates

This study aimed to investigate abrasion resistance, flexural toughness and impact resistance of concrete mixes with incorporated particles of crumb rubber (CR) as a partial substituent by volume to concrete natural aggregates. Seven concrete mixes were prepared with water to cement ratio 0.4 and cement content 450 kg/m3 . One mix, with no rubber content, was considered as a reference mix to compare the designated mechanical properties of plain rubberized mixes, while the remaining six mixes contained crumb rubber as a partial replacer at levels of 10%, 20% and 30% by volume of each sand and crushed stone aggregates. Abrasion resistance was evaluated according to British standard BS 1338 and impact resistance was measured according to ACI 544.2R. It has been discovered that increasing CR replacement level led to a significant improvement in abrasion resistance, flexural toughness, and impact resistance (number of blows that cause failure cracking). Abrasion lengths decreased by 3.0 - 20.6%, while flexural toughness and impact resistance increased by 8.2 - 39.4% and 18.7 - 365.4% respectively with increasing crumb rubber replacement level.

scholarly journals Pemakaian Fine Coarse Aggregate Sebagai Bahan Paving Tahan Aus (Fine Coarse Aggregate Usage As Raw Materials Of Abrasion Resistant Paving)

2012 ◽  
Vol 9 (1) ◽  
Author(s):  
Erwin Rommel Rommel
Keyword(s):  
Abrasion Resistance ◽  
Absorption Rate ◽  
Coarse Aggregate ◽  
Raw Materials ◽  
Impact Resistance ◽  
Container Terminals ◽  
Pressing Method ◽  
Research Results ◽  
Quality Aspects ◽  
Pavement Construction

Paving blocks are widely used in pavement construction such as container terminals, highways, parking lots, other open areas. Ease of installation, low maintenance and meet of the aestethics aspect cause more paving blocks of preferred. The FCA (fine coarse aggregate) paving blocks has the advantage in a mixture of 1:4:3, which is made by full-pressing method at 100 kg/cm2 with a strength reaches 406 kg/cm2 (grade-1); impact resistance is the best on the mixture of paving the heering-bone pattern. This further research will look at the quality aspects of paving from the abrasion resistance and the absorption rate of FCA paving blocks to provide paving mixture variables in (1; 4; 0, 1; 4; 3, 1; 4; 5) and the amount of pressing (60; 80 and 100 kg/cm2). The research results obtained minimum the abrasion resistance obtained at the paving 1; 4; 3 is given pressing 100 kg/cm2, abrasion value of 0.046 mm / min on a top layer of paving using admixture 1; 2 and 0.089 mm / min on without a top layer of paving blocks. The best absorption levels obtained at the paving with the same composition but at 60 kg/cm2 pressing provision.Key-word :  pressing, strength, abrasion resistance

scholarly journals Recovery of Latent Fingermarks on Metal Part of Motorcycle Submerged in Different Aquatic Environments

2021 ◽  
Vol 50 (8) ◽  
pp. 2343-2354
Author(s):  
Nur Fatin Nabihah Said ◽  
Nur Sharida Abd Rahman ◽  
Puwira Jaya Othman ◽  
Yusmazura Zakaria ◽  
Nik Fakhuruddin Nik Hassan
Keyword(s):  
Small Particle ◽  
Tap Water ◽  
Fingerprint Identification ◽  
Identification System ◽  
Aquatic Environments ◽  
Metal Part ◽  
Time Intervals ◽  
Metal Parts ◽  
Forensic Value

Motorcycle theft cases in Malaysia have increased quite significantly with more motorcycles were reported stolen every day. In many cases, criminals had removed the components they only required and disposed the remaining parts into various sources of water. Unfortunately, the evidence recovered underwater was thought not to have forensic value with regards to fingermark recovery. This study aimed to determine the survivability of the latent fingermarks submerged in various water environments. Latent fingermarks were deposited on metal parts of motorcycle and submerged into four aquatic environments; river, lake, mine, and tap water for two weeks with time intervals for collection of 1, 8, 24, 48, 96, 168, and 336 h. Upon recovery, the fingermark samples were developed using Small Particle Reagent (SPR). The developed fingermarks were assessed using Biometric Fingerprint Identification System (BIOFIS). The persistence of fingermarks immersed in tap water was found to last up to more than two weeks. Contrarily, fingermark in other water environments can only survive up to 96 h after being submerged. The fingermarks submerged in the lake appeared to be better preserved as compared to those submerged in the river and mine. The development of underwater fingermarks is still feasible, and identifiable fingermarks can still be recovered at the early submersion period.

Manufacturing-Oriented Multi-State Model for Aircraft Sheet Metal Parts

2006 ◽  
Vol 532-533 ◽  
pp. 933-936
Author(s):  
Jun Biao Wang ◽  
Chuang Liu ◽  
Xiao Ning Han ◽  
Bing Feng
Keyword(s):  
Sheet Metal ◽  
Intelligent Manufacturing ◽  
State Model ◽  
Digital Manufacturing ◽  
Model Structure ◽  
Metal Part ◽  
State Information ◽  
Metal Parts ◽  
Sheet Metal Parts ◽  
State Feature

In order to define the intermediate workpiece information for the digital manufacturing of aircraft sheet metal parts, the Manufacturing-Oriented Multi-State Model for Sheet Metal Part (MOSS) is further studied. The model structure is constructed by the hierarchy of State, Feature, Element and Data (SFED). The hierarchy represents its content and relationship among its components in detail. The model application scheme shows that state information can be integrated with the systems of process planning and tool design, and the model provides a foundation for digital and intelligent manufacturing of aircraft sheet metal parts.

Intermediate Stage Build of Sheet Metal in Progressive Die Design

2014 ◽  
Vol 687-691 ◽  
pp. 504-507
Author(s):  
Xiao Da Li ◽  
Xiang Hui Zhan
Keyword(s):  
Sheet Metal ◽  
Intermediate Stage ◽  
Die Design ◽  
Product Configuration ◽  
Metal Part ◽  
Progressive Die ◽  
Metal Parts ◽  
Sheet Metal Parts ◽  
Intermediate Configuration ◽  
Progressive Die Design

Intermediate stage build of Multi-station progressive die is to get intermediate configuration of every station and blank by unfolding product configuration reversely. It needs complicated hand computation and drawing to design intermediate stage with traditional method. In this paper, NX PDW module is used to finish the work. According to the shape of sheet metal, parts are simply classified into three types, and for different type of sheet metal part, different method to unfold the product configuration is discussed. The process of building intermediate stage with PDW is intuitive, timesaving, and also easy to modify.

Charged Uniform Molten Metal Droplet Spray as a Rapid Prototyping Technology

2012 ◽  
Vol 499 ◽  
pp. 195-199 ◽  
Author(s):  
Sheng Dong Gao ◽  
Yong Lu ◽  
Ying Xue Yao
Keyword(s):  
Rapid Prototyping ◽  
Molten Metal ◽  
Rapid Prototype ◽  
Metal Droplet ◽  
Experimental Device ◽  
Metal Part ◽  
Metal Parts ◽  
Droplet Stream ◽  
Break Up ◽  
Droplet Spray

Uniform molten metal droplet stream from jet break-up provides potential technology for metal parts rapid prototype manufacturing. In this study an experimental device capable of producing uniform metal droplet stream has been developed. Monosize spherical powders of 180m in diameter can be obtained after cooling and solidification. Then the droplets were electrostatically charged and deflected during flight to deposit onto a revolving substrate to form a 3D metal part.

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