Roughness of Metal Surface After Finishing Using Ceramic Brush Tools

Sałaciński, Tadeusz; Chmielewski, Tomasz; Winiarski, Maciej; Cacko, Robert�; Świercz, Rafał

doi:10.1515/adms-2017-0024

Cited by 28 publications

(26 citation statements)

References 12 publications

(11 reference statements)

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“…The other method of improving the properties of the material surfaces could be the use of the ceramic brush tools to change the roughness. High roughness can generate the notch effect, which can cause a cracking effect [12]. Also, welding imperfections may occur in offshore constructions.…”

Section: Introductionmentioning

confidence: 99%

Underwater In Situ Local Heat Treatment by Additional Stitches for Improving the Weldability of Steel

Tomków

Janeczek

2020

Applied Sciences

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In this paper the influence of in situ local heat treatment performed by additional stitches on the weldability of high-strength low-alloy (HSLA) S355J2C+N steel was tested. The investigated steel is characterized by high susceptibility to cold cracking. It is necessary to find a method to improve the quality of welded joints. The local heat treatment was applied as an effect of bead-on plate welding made on the face of a Tekken test joint. The specimens were made by the use of covered electrodes in the water environment. For testing weldability, Tekken test specimens were made. Then, the different number of the pad welds with different overlapping were laid on the face of the tested welds. Non-destructive (NDT) visual and penetrant tests were undertaken. During the NDT, imperfections like shape mistakes and spatters were found. Then, metallographic macro- and microscopic testing were performed. The macroscopic observations proved that water environment can generate imperfections like cracking and pores. However, for specimens with additional stitches the number of imperfections decreased. Microscopic tests proved that the proposed technique affected the structure of the heat-affected zone (HAZ). The specimens without the application of additional stitches are characterized by brittle bainitic and martensitic structure. Specimens, in which the additional stitches were applied, contain tempered martensite, fine ferrite and fine pearlite in their HAZ. It was also observed that the number of cracks decreased for in situ local heat-treatment specimens. The final step was Vickers HV10 hardness measurement. These measurements confirmed previous results. The heat from additional stitches affected the steel by significantly decreasing the hardness by 80–100 HV10. The results of experiments showed that the heat from pad welds provided microstructural changes in heat-affected zones and a decrease in the susceptibility to cold cracking, which results in improvement in the weldability of HSLA steel in wet welding conditions.

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Section: Introductionmentioning

confidence: 99%

Underwater In Situ Local Heat Treatment by Additional Stitches for Improving the Weldability of Steel

Tomków

Janeczek

2020

Applied Sciences

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“…The sample is deformed using the punch The sample 1 is placed in the modular micro-die (2) in the Micro-tool set (3) standing on the force transducer (5) fixed on the table (4) of the testing machine. The sample is deformed using the punch (6), which is at the end of the sonotrode (7) of the ultrasonic system (8-booster, 9-sandwich transducer). This system is mounted in the frame (10), which through the force transducer (11) is connected to the ram (12) of the testing machine.…”

Section: Methodsmentioning

confidence: 99%

“…Metals 2019, 9, x FOR PEER REVIEW 3 of 13 (6), which is at the end of the sonotrode (7) of the ultrasonic system (8-booster, 9-sandwich transducer). This system is mounted in the frame (10), which through the force transducer (11) is connected to the ram (12) of the testing machine.…”

Section: Methodsmentioning

confidence: 99%

“…They concern, in principle, all elements of the technological process. Surface layer and contact phenomena [4][5][6], affecting the friction [7][8][9], lubrication [10], and galling [11], increasing the role of preparation methods for micro-billets surfaces [12,13]. They also refer to the internal structure [14][15][16], which affects the quality of the surface and cracking mechanisms [17,18].…”

Section: Introductionmentioning

confidence: 99%

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Material Flow in Ultrasonic Orbital Microforming

Presz

2019

Metals

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Ultrasonic orbital microforming—UOM—uses the broadly understood idea of orbital forging but uses very different laws of physics. The only shaping force in this process is the inertia force resulting from the acceleration in the rotary motion of the workpiece. Micro specimen blanked from cold rolled aluminum sheet metal was used in the applied UOM process. Only the upper and lower part of the sample is deformed that gives about 70% of volume. The rest—the middle part—remains undeformed. The final shape of the product is influenced by the shape of the inside of the die in which the UMO process is carried out. However, this effect is not a direct one. The product shape does not repeat the shape of the interior of the die. The preliminary experiments with modular micro-die have been performed on the way of controlling the shape of deformed micro-objects. The microstructure analysis has been done as well as micro-hardness distribution.

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“…Bonding ceramic materials with metals is one of the most difficult tasks in joining engineering. Difficulties in bonding the presented pair of materials result from the extremely different physical and chemical properties of ceramic and metal materials [6][7][8]. One of the major problems with the mismatch of ceramics and metal from the point of view of a creation of the joint is primarily the difference in the structure of atomic, ionic, and mixed bonds, and the insufficient wettability of the ceramic surface for most of the liquid metals.…”

Section: Introductionmentioning

confidence: 99%

Structure Investigation of Titanium Metallization Coating Deposited onto AlN Ceramics Substrate by Means of Friction Surfacing Process

et al. 2019

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The article presents selected properties of a titanium metallization coating deposited on aluminum nitride (AlN) ceramics surface by means of the friction surfacing method. Its mechanism is based on the formation of a joint between the surface of an AlN ceramics substrate and a thin Ti coating, involving a kinetic energy of friction, which is directly converted into heat and delivered in a precisely defined quantity to the resulting joint. The largest effects on the final properties of the obtained coating include the high affinity of titanium for oxygen and nitrogen and a relatively high temperature for the deposition process. The titanium metallization coating was characterized in terms of surface stereometric structure, thickness, surface morphology, metallographic microstructural properties, and phase structure. The titanium coating has a thickness ranging from 3 to 7 μm. The phase structure of the coating surface (XPS investigated) is dominated by TiNxOy with the presence of TiOx, TiN, metallic Ti, and AlN. The phase structure deeper below the surface (XRD investigated) is dominated by metallic Ti with additional AlN particles originating from the ceramic substrate due to friction by titanium tools.

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Roughness of Metal Surface After Finishing Using Ceramic Brush Tools

Cited by 28 publications

References 12 publications

Underwater In Situ Local Heat Treatment by Additional Stitches for Improving the Weldability of Steel

Underwater In Situ Local Heat Treatment by Additional Stitches for Improving the Weldability of Steel

Material Flow in Ultrasonic Orbital Microforming

Structure Investigation of Titanium Metallization Coating Deposited onto AlN Ceramics Substrate by Means of Friction Surfacing Process

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