scholarly journals Variation in Composition of Aluminium Alloy Al6463 on Wear Characteristics and Compressive Strength

2020 ◽  
Vol 44 (5) ◽  
pp. 359-364
Author(s):  
Amardeepak Mahadikar ◽  
Elliriki Mamatha ◽  
Sanjeeva Murthy ◽  
Narayana B. Doddapattar
Keyword(s):  
Compressive Strength ◽  
Aluminium Alloy ◽  
Aluminium Alloys ◽  
Wear Test ◽  
Industrial Sector ◽  
Attractive Alternative ◽  
Test Results ◽  
Compression Tests ◽  
Natural Form ◽  
Wear Characteristics

Aluminium is one of the widely used metals in industrial sector owing to its specific features and its commercial production started in late 19th century. In its natural form it is combined with oxygen and other elements and is the third most abundant metal in the earth’s crust. It can be machined easily and has a Face Centred Cubic (FCC) structure. Aluminium alloys are an attractive alternative to ferrous materials for tribological applications due to their low density and high thermal conductivity. The microstructure of aluminium alloys can be modified and mechanical properties can be improved by alloying, cold working and heat treatment. The present work mainly focuses on the study of the effect of variation in composition on the wear characteristics and compressive strength of aluminium alloy Al6463 by varying the compositions of the two major alloying elements, Magnesium (Mg) and Silicon (Si) in the alloy. Four specimens of the aluminium alloy Al6463 are prepared each for Magnesium composition varying b/w (0.5 to 0.875%) and Silicon composition varying b/w (0.2 to 0.575%). Wear and compression tests were carried out as per ASTM standard. The results of the wear test indicate that the least wear rate was obtained for specimens of 0.750% Mg and 0.575% Si composition of the alloy Al6463 at a higher load of 1.5 kg. Also, the compression test results indicate that the specimens with 0.750% Mg and 0.575% Si compositions of the alloy Al6463 exhibit better compressive strength.

Wear Characteristics of Polycrystalline Diamond Compact Drill Bits in Small Diameter Rock Drilling

1985 ◽  
Vol 107 (4) ◽  
pp. 534-542 ◽  
Author(s):  
C. L. Hough ◽  
B. Das
Keyword(s):  
Small Diameter ◽  
Polycrystalline Diamond ◽  
Wear Test ◽  
Test Results ◽  
Failure Characteristics ◽  
Wear Characteristics ◽  
Drill Bits ◽  
Rotary Speed ◽  
Polycrystalline Diamond Compact ◽  
Single Material

The wear characteristics of polycrystalline diamond compact (PDC) drill bits were investigated in the context of drilling small holes in a hard abrasive medium. An efficient method for measuring wear of the PDC drill bits was developed. The wear test results were grouped or categorized in terms of rotary speed, feed and wear or failure characteristics. Contrary to the three classical wear phases (break-in, uniform wear and rapid breakdown) of the single material cutters, four distinctive wear phases were formed for the PDC cutters: I–break-in, II–diamond wear, III–carbide wear, and IV–rapid breakdown. The characteristics of the wear phases were identified and some suggestions were made to alleviate the wear problem.

The Relationship of NaOH Molarity, Na2SiO3/NaOH Ratio, Fly Ash/Alkaline Activator Ratio, and Curing Temperature to the Strength of Fly Ash-Based Geopolymer

2011 ◽  
Vol 328-330 ◽  
pp. 1475-1482 ◽  
Author(s):  
M. M. A. Abdullah ◽  
H. Kamarudin ◽  
M. Bnhussain ◽  
I. Khairul Nizar ◽  
A.R. Rafiza ◽  
...  
Keyword(s):  
Compressive Strength ◽  
Fly Ash ◽  
Construction Industry ◽  
Curing Temperature ◽  
Test Results ◽  
Compression Tests ◽  
Naoh Solution ◽  
Alkaline Activator ◽  
Relationship Of ◽  
The Relationship

Geopolymer, produced by the reaction of fly ash with an alkaline activator (mixture of Na2SiO3 and NaOH solutions), is an alternative to the use of ordinary Portland cement (OPC) in the construction industry. However, there are salient parameters that affecting the compressive strength of geopolymer. In this research, the effects of various NaOH molarities, Na2SiO3/NaOH ratios, fly ash/alkaline activator, and curing temperature to the strength of geopolymer paste fly ash were studied. Tests were carried out on 50 x 50 x 50 mm cube geopolymer specimens. Compression tests were conducted on the seventh day of testing for all samples. The test results revealed that a 12 M NaOH solution produced the highest compressive strength for the geopolymer. The combination mass ratios of fly ash/alkaline activator and Na2SiO3/NaOH of 2.0 and 2.5, respectively, produced the highest compressive strength after seven days. Geopolymer samples cured at 60 °C produced compressive strength as high as 70 MPa.

scholarly journals Estimation of compressive strength based on Pull-Out bond test results for on-site concrete quality control

2011 ◽  
Vol 4 (4) ◽  
pp. 582-591 ◽  
Author(s):  
M. S. Lorrain ◽  
M. P. Barbosa ◽  
L. C. P. Silva Fº
Keyword(s):  
Quality Control ◽  
Compressive Strength ◽  
Concrete Strength ◽  
Test Results ◽  
Compression Tests ◽  
Pull Out ◽  
Underlying Principle ◽  
Strength Based ◽  
Concrete Quality ◽  
Definition Of

Quality control of structural concrete has been conducted for several decades based mainly on the results of axial compression tests. This kind of test, although widely used, is not exempt from errors and has some considerable drawbacks that may affect its reliability, such as the need for appropriate and careful specimen conditioning and adoption of adequate capping techniques. For these reasons, it would be useful to have complementary or alternative ways to check compressive strength, in order to improve concrete quality control. The use of a bond test to monitor concrete strength is being proposed by an international group of researchers from France, Tunisia and Brazil as a potential means to this end. Given the fact that the link between bond resistance and concrete strength is already well established, this type of test seems to be a viable alternative to traditional methods. Nonetheless, to check if the underlying principle is sound when used in different circumstances, the group has been gathering data from several studies conducted by different researchers in various countries, with distinct concretes and rebar types. An analysis of the data collected shows that there is a clear and strong correlation between bond resistance and compressive strength, no matter the influence of other variables. This result validates the basic idea of using an Appropriate Pull-Out (APULOT) bond test to assess concrete strength. If the general principle is valid for random data obtained from different studies, the definition of a clear and appropriate test will probably lead to the reduction of experimental noise and increase the precision of the strength estimates obtained using this method.

Compressive behavior of steel spiral confined engineered cementitious composites in circular columns

2020 ◽  
Vol 23 (14) ◽  
pp. 3075-3088
Author(s):  
Wei Hou ◽  
Guan Lin ◽  
Xiaomeng Li ◽  
Pandeng Zheng ◽  
Zixiong Guo
Keyword(s):  
Compressive Strength ◽  
High Performance ◽  
Uniaxial Tensile ◽  
Cementitious Composites ◽  
Test Results ◽  
Cementitious Composite ◽  
Compression Tests ◽  
Compressive Behavior ◽  
Engineered Cementitious Composites ◽  
Engineered Cementitious Composite

Extensive research has been conducted on the uniaxial tensile and compressive behavior of engineered cementitious composites. Despite the high tensile ductility and high toughness of engineered cementitious composites, transverse steel reinforcement is still necessary for high-performance structural members made of engineered cementitious composites. However, very limited research has been concerned with the compressive behavior of steel-confined engineered cementitious composites. This article presents the results of axial compression tests on a series of circular engineered cementitious composite columns confined with steel spirals. The test variables included the engineered cementitious composite compressive strength, the spiral pitch, and the spiral yield stress. The test results show that steel-confined engineered cementitious composites in the test columns exhibited a very ductile behavior; the steel spiral confinement contributed effectively to the enhancement of both strength and ductility of engineered cementitious composites. The test results were then interpreted by comparing them with the predictions from some existing models. It was found that the existing models previously developed for confined concrete failed to predict the compressive strength of steel-confined engineered cementitious composites with sufficient accuracy. New fitting equations for the compressive properties of steel-confined engineered cementitious composites were then obtained on the basis of the test results of this study as well as those from an existing study.

scholarly journals Influence of Aluminium Alloy Anodizing and Casting Methods on Structure and Functional Properties

2016 ◽  
Vol 61 (3) ◽  
pp. 1337-1342 ◽  
Author(s):  
J. Konieczny ◽  
K. Labisz ◽  
M. Polok-Rubiniec ◽  
A. Włodarczyk-Fligier
Keyword(s):  
Aluminium Alloy ◽  
Automobile Industry ◽  
Aluminium Alloys ◽  
Light And Electron Microscopy ◽  
Wear Test ◽  
Casting Process ◽  
Optical Microscope ◽  
Aviation Industry ◽  
Metallographic Examination ◽  
Anodic Treatment

Abstract This paper presents the influence of casting method and anodic treatment parameters on thickness and structure of an anodic layer formed on aluminium alloys. As test materials was used the aluminium alloy AlSi9Cu3, which was adopted to the casting process and anodic treatment. In this paper are presented the wear test results and metallographic examination, as well as hardness of non-anodised and anodised alloys subjected to anodising process. The investigations were performed using light and electron microscopy (AFM) for the microstructure determination. The morphology and size of the layer was also possible to determine. The anodising conditions for surface hardening and its influence on properties was analysed. The structure of the surface laser tray changes in a way, that there is a different thickness of the produced layer. The aluminium samples were examined in terms of metallography using the optical microscope with different image techniques as well as light microscope. Improving the anodization technology with appliance of different anodising conditions. Some other investigation should be performed in the future, but the knowledge found in this research concerning the proper process parameters for each type of alloy shows an interesting investigation direction. The combination of metallographic investigation for cast aluminium alloys – including electron microscope investigation – and anodising parameters makes the investigation very attractive for automobile industry, aviation industry, and others, where aluminium alloys plays an important role.

The Effects of Steel Content for the Mechanics Performance of Fiber Modified Polymer Resin Concrete

2013 ◽  
Vol 690-693 ◽  
pp. 760-762 ◽  
Author(s):  
Yu Jie Jin ◽  
Li Guang Xiao ◽  
Feng Luo
Keyword(s):  
Compressive Strength ◽  
Bending Strength ◽  
Test Results ◽  
Compression Tests ◽  
Polymer Resin ◽  
Modified Polymer ◽  
Mechanics Performance ◽  
Polymer Mortar ◽  
Microscopy Method ◽  
Electron Microscopy Method

In order to analysis the polymer mortar performance, with different steel content polymer mortar specimens by compression tests, bending tests, scanning electron microscopy method, test results indicate that: 3% of the cement dosage and cement dosage compared to 0%，flexural strength of polymer mortar increased 26%, compressive strength increased 6%, fold compression ratio increased accordingly. However, when the dosage is higher than 3%, resulting in large specific surface area of cement, bending strength and compressive strength has declined.

Mechanical Properties of Non-Cement Polymer Grout

2015 ◽  
Vol 1113 ◽  
pp. 80-85
Author(s):  
S.M. Nuria ◽  
A.B.A. Rahman ◽  
N.A.K. Hafizah ◽  
Yusof Ahmad ◽  
Azlan Adnan ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Compressive Strength ◽  
Fly Ash ◽  
Polyester Resin ◽  
Unsaturated Polyester ◽  
Fine Sand ◽  
Strength Properties ◽  
Test Results ◽  
Compression Tests ◽  
Rapid Setting

This paper studies the effects of binder and filler composition to the strength properties of non-cement polyester grout (NCPG). The binder consisted of unsaturated polyester resin whereas the filler consisted of fine sand and fly ash. The composition of binder-to-filler ratios investigated were 0.43, 0.67, 1, 1.49, and 2.3. The mechanical properties of NCPG were investigated through flowability and compression tests. The test results show that the use of polyester resin combined with fine sand and fly ash produces good quality grout with high flowable rate, rapid setting, self-consolidating and high compressive strength.

scholarly journals Study of the Compressive Strength of Mortars as a Function of Material Composition, Workability, and Specimen Geometry

2020 ◽  
Vol 2020 ◽  
pp. 1-6 ◽  
Author(s):  
M. T. Marvila ◽  
A. R. G. Azevedo ◽  
J. Alexandre ◽  
C. M. F. Vieira ◽  
E. B. Zanelato ◽  
...  
Keyword(s):  
Finite Element ◽  
Compressive Strength ◽  
Hydrated Lime ◽  
Strength Properties ◽  
Test Results ◽  
Compression Tests ◽  
Statistical Dispersion ◽  
Cylindrical Mold ◽  
The Difference ◽  
Marble Waste

In the present work, the statistical dispersion of the mortar compressive strength as a function of the geometric parameters of the specimens as well as the effect of the mortar workability difference on the compressive strength was investigated. For this purpose, specimens were prepared for six types of mortars: two conventional mortars in the proportions of 1 : 1 : 6 and 1 : 2 : 9 of cement, hydrated lime, and sand, respectively, two with clay replacing lime, and two with marble waste in place of lime. The results confirm the difference between the results found for the two geometries due to the differences in the heights of the molding layers and show that the workability of the mortar modifies the resistance properties, especially in the cylindrical mold where the molding of the specimens is more complex. By comparing the differences between the destructive test results and those defined by the Finite Element Modeling (FEM) for conventional mortars, it was clear that the effect of excess material in the sample during the compression tests did not change the strength properties studied. This facilitates the performance of the assay as specimens may be used excessively on the side without the need for sample rectification.

The Effects of Cement Volume for the Mechanics Performance of Fiber Modified Polymer Resin Concrete

2012 ◽  
Vol 253-255 ◽  
pp. 478-481 ◽  
Author(s):  
Yu Jie Jin
Keyword(s):  
Compressive Strength ◽  
Bending Strength ◽  
Test Results ◽  
Compression Tests ◽  
Polymer Resin ◽  
Modified Polymer ◽  
Mechanics Performance ◽  
Polymer Mortar ◽  
Microscopy Method ◽  
Electron Microscopy Method

Abstract. In order to analyze the polymer mortar performance with different cement volume polymer mortar specimens by the compression tests,the bending tests, scanning electron microscopy method, test results shows that: 115% of the cement dosage and cement dosage compared to 0%，flexural strength of polymer mortar increased 95%, compressive strength increased 74%, the ratio of flexural and compressive strength increased accordingly. However, when the dosage is higher than 115%, resulting in large specific surface area of cement, bending strength and compressive strength has declined.

Examination of the Properties of Resin Bonded Core Mixtures

2017 ◽  
Vol 885 ◽  
pp. 171-177
Author(s):  
Laura Mikóné Mádi ◽  
László Varga ◽  
Tamás Mikó
Keyword(s):  
Compressive Strength ◽  
Molten Metal ◽  
Production Technology ◽  
Bending Strength ◽  
Test Results ◽  
Compression Tests ◽  
The Core ◽  
The Past ◽  
Furan Resin ◽  
Cold Box

The production technology for automotive foundry castings has developed significantly during the past decade. The production of cylinder hats with more and more complex designs could be rather challenging for core makers. Heating might cause the annealing of the core, thus, the buoyancy of the molten metal increases which might cause the movement of the core. The heat distortion of the cores was examined with a Hot Distortion Tester. A universal Instron 5982 device was used for bending, wedge penetration strength and cold and hot compression tests. The test bars were prepared with cold- and hot-box processes using DMPA (Dimethylpropyl-amine) under laboratory conditions. The tests showed that the decrease of the bending strength is proportional to the amount of additives. The compression test results showed that the test bars produced with cold-box compression have the lowest and the ones with furan resin mixtures have the highest compressive strength.

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