Drilling performances and wear characteristics of coated drill bits during drilling reinforced concrete

Sathish, S.; Sathiyamurthy, Ramkumar; Manivasagam, Geetha

doi:10.1111/ijac.13051

Cited by 4 publications

(3 citation statements)

References 20 publications

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“…Previous studies proved that the increase in cutting force increases the machining temperature, which increases the tendency of the workpiece material to stick to the tool. 34,47,48…”

Section: Resultsmentioning

confidence: 99%

Investigation of drilling properties of AA7075/Al₂O₃ functionally graded materials using gray relational analysis

Yıldız

Sur

2021

Proceedings of the Institution of Mechanical Engineers, Part B:

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The present paper reports an experimental study on the fabrication and characterization of aluminum-oxide-reinforced functionally graded aluminum composites and optimization of drilling parameters on thrust force and average surface roughness using gray relational analysis. For this purpose, AA7075/Al2O3 functionally graded materials were produced with three layers that have different ratios of Al2O3 via high-temperature isostatic pressing and powder metallurgy method. Hardness behaviors of the layers were determined. Further, microstructural characterizations of the layers were carried out. Functionally graded materials were machined at dry cutting conditions with a 6 mm uncoated cemented carbide drill bit. The drilling experiments were carried out under different conditions such as point angles, helix angles, and feed rates, while the 25 m/min cutting speed was kept constant. The effects of factors on thrust force and surface roughness were evaluated using analysis of variance and gray relational analysis in full factorial experimental design. The minimum thrust force was measured at 221 N in a 140° point angle, 15° helix angle, and 0.075 mm/rev feed rate. Results of the gray relational analysis showed that feed rate was the dominant factor on thrust force and average surface roughness. Consequently, the highest and lowest gray relational grades were obtained at 0.899 and 0.374, respectively.

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“…Previous studies proved that the increase in cutting force increases the machining temperature, which increases the tendency of the workpiece material to stick to the tool. 34,47,48…”

Section: Resultsmentioning

confidence: 99%

Investigation of drilling properties of AA7075/Al₂O₃ functionally graded materials using gray relational analysis

Yıldız

Sur

2021

Proceedings of the Institution of Mechanical Engineers, Part B:

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“…Nondestructive testing should cover from 2% (for good homogeneity) to 100% (for poor homogeneity) of the girders in a given structure [ 45 ]. Examples of the application of the “direct” method can be found in the literature [ 68 , 69 ].…”

Section: Methodsmentioning

confidence: 99%

Elements of Pathway for Quick and Reliable Health Monitoring of Concrete Behavior in Cable Post-Tensioned Concrete Girders

et al. 2021

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The paper discusses the problems connected with long-term exploitation of reinforced concrete post-tensioned girders. The scale of problems in the world related to the number of cable post-tensioned concrete girders built in the 1950s and still in operation is very large and possibly has very serious consequences. The paper presents an analysis and evaluation of the results of measurements of the deflection and strength and homogeneity of concrete in cable–concrete roof girders of selected industrial halls located in Poland, exploited for over 50 years. On the basis of the results of displacement monitoring in the years 2009–2020, the maximum increments of deflection of the analyzed girders were determined. Non-destructive, destructive, and indirect evaluation methods were used to determine the compressive strength of concrete. Within the framework of the indirect method recommended in standard PN-EN 13791, a procedure was proposed by the authors to modify the so-called base curve for determining compressive strength. Due to the age of the analyzed structural elements, a correction factor for the age of concrete was taken into account in the strength assessment. The typical value of the characteristic compressive strength is within the range 20.3–28.4 MPa. As a result of the conducted tests, the concrete class assumed in the design was not confirmed, and its classification depended on the applied test method. The analyzed girders, in spite of their long-term exploitation, can be still used for years on the condition that regular periodical inspections of their technical condition are carried out. The authors emphasize the necessity for a permanent and cyclic diagnostic process and monitoring of the geometry of girders, as they are expected to operate much longer than was assumed by their designers.

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“…Metal based diamond tools can obtain stronger mechanical properties compared with resin and ceramic based tools, and thus have been widely applied in oil and gas drilling, mineral resources exploration, geotechnical investigation and surveying, repair and reconstruction for reinforced concrete structures, etc. [1][2][3][4]. Those diamond tools typically include impregnated diamond bits, saws, wires and wheels [5][6][7][8], all of which can be employed for some specific industries and environments.…”

Section: Introductionmentioning

confidence: 99%

Investigation of Filling Phase Percentages on the Performance of WC-Cu Based Hot-Pressing Diamond Bit Matrices

Tan

Fang

et al. 2019

Metals

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WC-Cu based hot-pressing diamond bit has been widely applied in all-hydraulic geological exploration, as well as deep and ultra-deep well drilling in the oil and gas industry. However, the effect laws and mechanisms of Cu and WC on the metal matrix composite need further study. Therefore, six WC-Cu based metal matrices were designed, and a series of samples with different dimensions were fabricated to conduct some specific physical and mechanical tests, namely, tests of relative density, Rockwell hardness, bending strength, impact toughness and abrasion weight loss. Additionally, the microstructure and diamond retention conditions of the WC-Cu based samples after bending strength test, as well as their wear morphologies after the pin-on-disc wear test, were analyzed by scanning electron microscope. Test results indicate that most of the physical and mechanical properties were improved with the increase of 663-Cu at first, and then monotonously declined. The increase of 663-Cu also shows an important influence on the samples’ microstructure, diamond retention capacity and wear mechanism.

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Drilling performances and wear characteristics of coated drill bits during drilling reinforced concrete

Cited by 4 publications

References 20 publications

Investigation of drilling properties of AA7075/Al₂O₃ functionally graded materials using gray relational analysis

Investigation of drilling properties of AA7075/Al₂O₃ functionally graded materials using gray relational analysis

Elements of Pathway for Quick and Reliable Health Monitoring of Concrete Behavior in Cable Post-Tensioned Concrete Girders

Investigation of Filling Phase Percentages on the Performance of WC-Cu Based Hot-Pressing Diamond Bit Matrices

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Drilling performances and wear characteristics of coated drill bits during drilling reinforced concrete

Cited by 4 publications

References 20 publications

Investigation of drilling properties of AA7075/Al2O3 functionally graded materials using gray relational analysis

Investigation of drilling properties of AA7075/Al2O3 functionally graded materials using gray relational analysis

Elements of Pathway for Quick and Reliable Health Monitoring of Concrete Behavior in Cable Post-Tensioned Concrete Girders

Investigation of Filling Phase Percentages on the Performance of WC-Cu Based Hot-Pressing Diamond Bit Matrices

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Investigation of drilling properties of AA7075/Al₂O₃ functionally graded materials using gray relational analysis

Investigation of drilling properties of AA7075/Al₂O₃ functionally graded materials using gray relational analysis