Effect of Burn-off Length on the Properties of Friction Welded Dissimilar Steel Bars

Cheepu, Muralimohan; Seong, Woo

doi:10.5781/jwj.2019.37.1.6

Cited by 36 publications

(13 citation statements)

References 36 publications

(33 reference statements)

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“…Higher burn-off lengths were observed at the Inconel 625/F22 interface (7 mm) compared to the Inconel 718/Inconel 625 interface (5 mm) during the friction welding. Similar formation of the intermixing layers was reported during the dissimilar joining of the SAE1045 to 316L using the friction welding technique [24].…”

Section: Microstructure: Weldssupporting

confidence: 78%

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Dissimilar Rotary Friction Welding of Inconel 718 to F22 Using Inconel 625 Interlayer

et al. 2021

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Dissimilar metal joining has always been a challenging task because of the metallurgical incompatibility and difference in melting points of alloys being joined. Diffusion and mixing of alloying elements from dissimilar base metals at the weld often cause unwanted metallurgical changes resulting in unsuccessful welds or underperformance of the weldment. Solid-state dissimilar friction welds of Inconel 718 and F22 were prepared in this study with an Inconel 625 interlayer to address the carbon enrichment of Inconel 718 during the welding. Defect-free rotary friction welds were produced in this study. Microstructural and mechanical properties investigation of the weldments and base metals was carried out, and results were analysed. Intermixing zone was observed at the weld interface due to the softening of the metal at the interface and rotatory motion during the welding. The high temperatures and the plastic deformation of the intermixing zone and thermo-mechanically affected zone (TMAZ) resulted in the grain refinement of the weld region. The highest hardness was observed at the Inconel 718/F22 weld interface due to the plastic strain and the carbon diffusion. The tensile specimens failed in the F22 base metal for the weld prepared with and without the Inconel 625 interlayer. Inconel 718/F22 welds exhibited lower toughness values compared to the Inconel 718/F22 welds prepared with Inconel 625 interlayer.

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Section: Microstructure: Weldssupporting

confidence: 78%

“…Sci. 2021, 11, x FOR PEER REVIEW 9 of 15 intermixing layers was reported during the dissimilar joining of the SAE1045 to 316L using the friction welding technique [24].…”

Section: Microstructure: Weldsmentioning

confidence: 99%

Dissimilar Rotary Friction Welding of Inconel 718 to F22 Using Inconel 625 Interlayer

et al. 2021

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“…[5][6][7][8][9] Since the early 1970s, research on friction welding of dissimilar materials has been increasing, including research on the determination of optimum conditions, the application, and the strength of friction welding. [10][11][12][13][14][15] Chromium molybdenum (SCM440) structural alloy steel is widely used in mechanical parts that require durability such as shafts, gears, and nuts. At the same time, Inconel steel (IN718) has excellent corrosion resistance and heat resistance, and its strength hardly deteriorates even at high temperatures.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the mechanical properties of Inconel 718 to SCM 440 dissimilar friction welding through real-time monitoring of the acoustic emission system

Kong

Cheepu²,

Lee

2021

Proceedings of the Institution of Mechanical Engineers, Part L:

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Friction welding was chosen for its versatility in the joining of dissimilar materials with high quality. The aim of this study is to determine the optimal welding conditions for attaining quality joints by using online monitoring of acoustic emission system signals. During friction welding, the formation of cracks, defects, or any abnormalities in the joining process which have a detrimental effect on the joints quality was identified. The most widely used materials in the aerospace industry—Inconel 718 and molybdenum steel—were joined by friction welding. The precision of the joints, internal defects, and quality are major concerns for aerospace parts. The results of the present research determined the optimal welding conditions for high tensile strength by nondestructively inducing acoustic emission signals. During friction time and upset time periods, the typical waveforms and frequency spectrum of the acoustic emission signals were recorded, and their energy level, average frequency, cumulative count, and amplitude were analyzed. Both cumulative count and amplitude were found to be useful parameters for deriving the optimal welding conditions. In the initial stage of friction welding, a very high voltage of continuous form was generated with frequency characteristics of 0.44 MHz and 0.54 MHz. The signals generated during the upset stage had a low voltage, but a very high frequency of 1.56 MHz and 1.74 MHz with a burst-type signal. The amplitude of the signal generated for the optimally welded joints was about 100 dB at the friction time and about 45 dB at the upset time.

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“…Dari table 5 data suhu maksimum Benda kerja Sudut chamfer sangat berpengaruh terhadap kekuatan tarik sambungan las gesek, pengaruh dari sudut chamfer dan pemberian gaya tekan akhir atau upset pressure diatas 120 MPa dapat meningkatkan kekuatan tarik dari sambungan las gesek [12]. Semakin besarnya sudut chamfer maka permukaan dari kedua benda yang saling bergesekan akan semakin luas.…”

Section: Daerah Hazunclassified

Pengaruh Double Chamfer terhadap Distribusi Suhu dan Daerah Zpl pada Sambungan Las Gesek AL6061 dengan Simulasi Komputer

Nadya

Irawan

Choiron

2021

JRM

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Welding is one of the metal joining processes in manufacturing. CDFW (continuous drive friction welding) is a welding process to join two workpieces by applying pressure at one end of the object and rotating another one where the friction action applies at interface. The purpose of this study is to study temperature distribution on the surface of the welding area and the heat-affected zone represented by a fully plasticized zone (Zpl) and to get an insight of a friction welding process. The variables of CDFW used were double chamfer angle, upset pressure, and burn off length. The initial area of friction was equal that is at a diameter of 14 mm. The method of modeling the CDFW friction welding is via computer simulations using ANSYS 18.1 software. This research uses aluminum material type Al6061. The Taguchi method was applied in designing the simulations. In this modeling, the model with the double chamfer of 15 °, the upset pressure of 120 MPa, and the burn-off length of 9 mm has a small ZPl area of 10.256 mm2. Whilst the specimen model, with a double chamfer angle of 45 °, the upset pressure of 240 MPa, and the burn-off length of 7 mm has a large Zpl area of 56.55mm2. The area of a narrow fully plasticized area caused by small chamfer angle and an upset pressure of 240 MPa. The area of fully plasticized zone shows how much material can be integrated during the friction welding process and how much strength of the weld metal. The model with the chamfer angle of 15 º, the upset pressure of 240 MPa, and the burn-off length of 9 mm has the widest temperature distribution and the highest maximum temperature. Meanwhile, the model with the chamfer angle of 30º, the upset pressure of 120 MPa, and the burn-off length of 9 mm has the narrowest temperature distribution and the lowest maximum temperature. The smaller chamfer angle increased upset pressure and burn-off length result in the wider temperature distribution, higher maximum temperature, and smaller Zpl.

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Effect of Burn-off Length on the Properties of Friction Welded Dissimilar Steel Bars

Cited by 36 publications

References 36 publications

Dissimilar Rotary Friction Welding of Inconel 718 to F22 Using Inconel 625 Interlayer

Dissimilar Rotary Friction Welding of Inconel 718 to F22 Using Inconel 625 Interlayer

Evaluation of the mechanical properties of Inconel 718 to SCM 440 dissimilar friction welding through real-time monitoring of the acoustic emission system

Pengaruh Double Chamfer terhadap Distribusi Suhu dan Daerah Zpl pada Sambungan Las Gesek AL6061 dengan Simulasi Komputer

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