Fatigue and Mechanical Properties of Aluminium-Copper Bi-Metal Tubes

Sajuri, Zainuddin; Baghdadi, Amir Hossein; Mahmod, Muhammad Faisal; Syarif, Junaidi

doi:10.4028/www.scientific.net/amr.896.626

Cited by 6 publications

(3 citation statements)

References 5 publications

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“…It provides a reliable basis for the fatigue failure analysis of 9 Cr 1 Mo steel tubes for boilers. Sajuri et al [19] characterized the metallurgical, mechanical, and fatigue properties of copper-phosphorus alloys and aluminum-copper bimetallic tubes by metallographic analysis and tensile, bending, and fatigue tests. The results showed that a fragile Al-Cu intermetallic compound was found in the transition layer between Al and Cu.…”

Section: Of 14mentioning

confidence: 99%

Study of the Mechanical Properties of Highly Efficient Heat Exchange Tubes

Qian

Wen

et al. 2020

Materials

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Highly efficient heat exchange tubes are special tube shapes that are widely used in heat exchangers to enhance heat transfer. In this study, experimental measurements and numerical simulations were carried out on two types of highly efficient heat exchange tubes, namely, spirally grooved tubes and converging–diverging tubes, to investigate changes in their mechanical properties after rolling from smooth tubes. It was found that, unlike the smooth tubes, all axial, circumferential, and radial stresses exist at the two types of tubes under axial loading, and the maximum axial stress is much larger than that at the smooth tubes. Compared to the smooth tubes, the yield strength and ultimate strength of the highly efficient heat exchange tubes increase while the axial elastic stiffness decreases. Although the capability of resisting fatigue fracture of the highly efficient heat exchange tubes is less than that of smooth tubes, they still meet the requirements of the heat exchanger under fatigue loading. Axial stress concentration factors and stiffness equivalent factors for the highly efficient heat exchange tubes are regressed as a function of the structural parameters for engineering applications.

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Section: Of 14mentioning

confidence: 99%

Study of the Mechanical Properties of Highly Efficient Heat Exchange Tubes

Qian

Wen

et al. 2020

Materials

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“…Finally, through fracture morphology analysis, it was found that the leakage in a titanium tube was caused by fatigue. Sajuri et al [26] studied the mechanical strength and fatigue properties of bimetallic pipes with an experimental method. The experimental results showed that the fatigue strength of aluminum copper bimetallic tube was about half lower than that of copper alloy tube.…”

Section: Introductionmentioning

confidence: 99%

Mechanical Properties and Heat Transfer Performance of Conically Corrugated Tube

Qian

Liu

et al. 2021

Materials

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Conically corrugated tube is a new type of high-efficiency heat exchange tube. In this paper, the mechanical and heat transfer properties of conically corrugated tubes formed by the cold rolling of smooth tubes are studied through experimental measurement and numerical simulation to lay the foundations for applying the tubes in heat exchangers. The results show that while conically corrugated tube has a lower axial elastic stiffness compared with smooth tube, conically corrugated tube has a higher yield strength and ultimate strength. Unlike smooth tubes, conically corrugated tubes develop three-dimensional stresses when an axial tensile load is applied to them. In addition, the heat transfer coefficient of conically corrugated tube is 15%, 17%, and 115% higher than that of spiral grooved tube, convergent divergent tube, and smooth tube, respectively. Finally, the correlation equations of the axial stress concentration factor, stiffness equivalent coefficient, Nusselt number, and flow resistance coefficient of conically corrugated tubes are obtained for engineering application.

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“…Copper (Cu) and aluminium (Al) metallic alloys have broad applications in heating, ventilation and air conditioning, refrigeration and electrical industries due to their properties, such as high electrical and thermal conductivity and corrosion resistance [1][2][3][4]. Cu alloy is a relatively expensive material with a higher density compared with Al alloy [5].…”

Section: Introductionmentioning

confidence: 99%

Effect of Process Parameters on Interfacial Bonding Properties of Aluminium–Copper Clad Sheet Processed by Multi-Pass Friction Stir-Welding Technique

Osman

Sajuri

Baghdadi

et al. 2019

Metals

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In this study, continuous multi-pass friction stir welding was used to clad dissimilar AA6061 aluminium (Al) and C2801P copper (Cu) alloy materials. The empirical relationships between three process parameters and two-factor responses of Al–Cu clad joints were evaluated. Mathematical models were generated using regression analysis to predict the variation in tensile shear and peel load of the cladded joints. The sufficiency of the developed model was validated by analysis of variance (ANOVA), and the multi-criterion optimisation of factor responses was carried out via the response surface method. Results showed the formation of mechanical interlocking at the cladded interface and the development of a thin metallurgical bonding layer consisting of Al alloy content (8–21%), which greatly affected the quality of the Al–Cu joint interface. Moreover, the increase in shoulder overlap ratio, welding speed and tool rotational speed improved the shear and peel strength up to a certain range before gradually declining. The optimised process parameters for the cladded Al–Cu were obtained at a rotational speed of 986 r/min, welding speed of 8.6 mm/min and shoulder overlap ratio of 35%. The cladded Al–Cu generated a shear strength of 5850 kPa and peel strength of 750 kPa with an overall desirability function of 0.94.

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Fatigue and Mechanical Properties of Aluminium-Copper Bi-Metal Tubes

Cited by 6 publications

References 5 publications

Study of the Mechanical Properties of Highly Efficient Heat Exchange Tubes

Study of the Mechanical Properties of Highly Efficient Heat Exchange Tubes

Mechanical Properties and Heat Transfer Performance of Conically Corrugated Tube

Effect of Process Parameters on Interfacial Bonding Properties of Aluminium–Copper Clad Sheet Processed by Multi-Pass Friction Stir-Welding Technique

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