Direct drive friction welding effect on mechanical and electrochemical characteristics of titanium stabilized austenitic stainless steel (AISI 321) research reactor thick tube

Titouche, Nacer-Eddine; Boukharouba, Taoufik; Amzert, Sid Ahmed; Hassan, Ammar Jabbar; Lechelah, Ramzi; Ramtani, S.

doi:10.1016/j.jmapro.2019.03.016

Cited by 18 publications

(12 citation statements)

References 47 publications

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“…The welding interface suffered most thermo-plastic deformation via high friction between contact surfaces at the interface [4], which results dynamic recrystallization cause of high pressure and temperature. Forging pressure, on the other hand, is great responsible on the elevation of hardness due to strain hardening effect during process [23], that revealed as a high plastically deformed zone HPDZ at the weld interface with dark color [15].…”

Section: Micro-hardness Surveymentioning

confidence: 99%

“…Principle characteristic of this process is producing coalescence at temperature essentially below than the melting point of the base metal being welded [1,2]. This method is clean, easily automated, high energy efficiency, narrower heat affected zone [HAZ], low welding cost, high material save and low production time [3][4][5]. In particular, friction welding is able to easily produce joints with high reliability and efficiency; it is widely used in the automobile industries and applied to fabricate important parts such as drive shafts, compressor or pumps shafts and engine valves [6].…”

Section: Introductionmentioning

confidence: 99%

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Friction welding of AISI 304: effect of friction time on micro-structure, micro-hardness and tension-compression properties

Hassan

Boukharouba

Miroud

2020

Acta Metall Slovaca

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During direct drive friction welding could relatively predicting the micro-structural and mechanical properties of friction-welded joints by controlling the welding conditions; friction time is an important coefficient that effects on these properties, present study focused on the effect of that time on micro-structural and mechanical phenomena during that process. The process achieved in different friction time, while welding joints investigated by macroscope, microstructure, scanning electron microscope, tensile, compression and micro-hardness tests. The micro-hardness tests were performd along the interface and axial direction. Thus, the tensile tests carried out on the standardized test piece with effective diameter of 6 mm and compression tests were extracted at welded center in three angles of 0°, 45° and 90° with test specimen of 4 mm diameter and 6.5 mm length. The results showed that with increasing friction time could be found hard zone at the interface of welded joint because of extended of high plastically deformation zone, which will responsible on decreasing some useful mechanical properties such as ultimate tensile strength and yield compression strength. However, tensile fracture position occurred adjacent to the interface at the thermo-mechanical deformation zone in the rotating side for all welding pieces, where the micro-hardness attenuated at that region.

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Section: Micro-hardness Surveymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Friction welding of AISI 304: effect of friction time on micro-structure, micro-hardness and tension-compression properties

Hassan

Boukharouba

Miroud

2020

Acta Metall Slovaca

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“…Specifically, the surface roughness of products also needs to be extremely smooth, such as clean tubes, vacuum tubes, bearings, sleeves and hydraulic cylinder parts, etc. The general grinding and polishing methods include mechanical grinding, electrolytic polishing, ultrasonic finishing, electro-chemical polishing, fluid polishing and magnetic abrasive finishing (MAF) [1][2][3]. A magneto-rheological abrasive flow finishing (MR-AFF) technique [4][5][6] was developed to make the precise elements; this method utilized a magnetic field to constrain the permeability fluid abrasive to finish the surface of workpieces.…”

Section: Introductionmentioning

confidence: 99%

Characteristics of the Polishing Effects for the Stainless Tubes in Magnetic Finishing with Gel Abrasive

et al. 2021

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Magnetic abrasive finishing (MAF) is a fast, high efficiency and high-precision polishing method on the surface machining of the metals. Furthermore, MAF also can be utilized to polish the stainless tubes in industrial applications; however, stainless tubes are often a non-magnetic material that makes it difficult for the magnetic field line to penetrate into the stainless tubes, thus reducing the magnetic forces in the inner tubes polishing. That is why stainless tubes are not easy to finish using traditional MAF. Therefore, magnetic finishing with gel abrasive (MFGA) applies gels mixed with steel grit and abrasives that were developed to improve the polishing efficiency and surface uniformity of the steel elements. In this study, a guar gum or silicone gel mixed with steel grit and silicon carbides are used as the magnetic abrasive gel to polish the stainless inner tubes. A DC motor was used to control the rotation speed of the chuck and an AC induction motor connected with an eccentric cam to produce the reciprocating motion of the workpiece were utilized to finish the inner surface of stainless tubes in the polishing process. The parameters of abrasive concentration, abrasive particle sizes, rotation speeds of motor and electric currents were used to investigate the surface roughness and the removal of materials from the stainless tubes. The experimental results showed that since guar gum had better fluidity than the silicone gel did, guar gum created excellent polishing efficiency in MFGA. Furthermore, the surface roughness of the stainless tube decreased from 0.646 μm Ra to below 0.056 μm Ra after processing for 30 min with the parameters of current 3A, gel abrasive with guar gum, rotational speed 1300 rpm and vibration frequency 4 Hz.

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“…The metallurgical aspects and mechanical properties of SS321 weldments have been extensively studied in various research works. 9,10 Ramkumar et al. 11 examined the microstructures and the mechanical integrity of SS321 weld seams using pulsed current GTAW process with ER347, ERNiCrMo-3 and ERNiCrMo-4 filler materials.…”

Section: Introductionmentioning

confidence: 99%

Double-sided GTAW of nuclear grade steel: Mechanical and microstructure perspectives

Kumar

Shanmugam

2021

Proceedings of the Institution of Mechanical Engineers, Part E:

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This article investigates the microstructural evolution and mechanical integrity of austenitic stainless steel SS321, a titanium stabilized nuclear grade mainly preferred for severe corrosive environments. The double-sided gas tungsten arc welding (DS-GTAW) technique was utilized to fabricate the butt joint having a plate thickness of 6 mm. A heat input of 1.4058 kJ/mm was used to obtain the maximum depth of penetration (DoP) of 3.3 mm with welding speed 120 mm/min and current 220A. Optical microscopy reveals the microstructure of weldment and base metal (SS321). The DS-GTA weldments were subjected to tensile, bend, impact and microhardness tests and the results are evaluated. The fusion zone consists of columnar, equiaxed dendrites, and intermetallic compounds of Titanium carbide (TiC). From EBSD examination the higher fraction of Low Angle Grain Boundaries is corroborated to the increase in tensile strength and reduction in impact toughness of the weldment. The ferrite measurement reveals the increase in ferrite content in the weldment (6.1 FN) and this attributed to the presence of retained δ-ferrite in comparison to SS321 (1.2 FN). X-Ray Diffraction (XRD) pattern reveals austenite and ferrite peaks are present in the SS321 and weldment. Ductile mode of fracture (using SEM-Scanning electron microscope) was observed in the uni-axial tensile and impact test of weldment specimens.

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Direct drive friction welding effect on mechanical and electrochemical characteristics of titanium stabilized austenitic stainless steel (AISI 321) research reactor thick tube

Cited by 18 publications

References 47 publications

Friction welding of AISI 304: effect of friction time on micro-structure, micro-hardness and tension-compression properties

Friction welding of AISI 304: effect of friction time on micro-structure, micro-hardness and tension-compression properties

Characteristics of the Polishing Effects for the Stainless Tubes in Magnetic Finishing with Gel Abrasive

Double-sided GTAW of nuclear grade steel: Mechanical and microstructure perspectives

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