Effects of ultrasonic peening treatment on surface quality of CMT-welds of Al alloys

Tian, Yinbao; Shen, Junqi; Hu, Shengsun; Liang, Ying Chun; Bai, Peng

doi:10.1016/j.jmatprotec.2017.11.029

Cited by 38 publications

(19 citation statements)

References 18 publications

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“…They also predicted a model based on experimental results to determine the surface hardness under different process parameters. Tian et al [ 85 ] provided insight into the application of UIP on cold metal transfer (CMT) welded 6061 aluminum alloy, and they concluded that UIP can effectively eliminate the pores in the weld bead close to the weld surface, and changed the morphology of pores in the center of the weld bead. After UIP, the elastic modulus of weld bead and wear resistance of weld were enhanced because of the reduction in porosity content.…”

Section: Peening Techniquesmentioning

confidence: 99%

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Peening Techniques for Surface Modification: Processes, Properties, and Applications

et al. 2021

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Surface modification methods have been applied to metals and alloys to change the surface integrity, obtain superior mechanical properties, and improve service life irrespective of the field of application. In this review paper, current state-of-the-art of peening techniques are demonstrated. More specifically, classical and advanced shot peening (SP), ultrasonic impact peening (UIP), and laser shock peening (LSP) have been discussed. The effect of these techniques on mechanical properties, such as hardness, wear resistance, fatigue life, surface roughness, and corrosion resistance of various metals and alloys, are discussed. This study also reports the comparisons, advantages, challenges, and potential applications of these processes.

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Section: Peening Techniquesmentioning

confidence: 99%

“… SEM of weld bead of CMT welded 6062 aluminum alloy ( a ) without UIP; ( b ) with UIP. Reproduced with permission from [ 85 ]. Copyright Elsevier, 2018.…”

Section: Figurementioning

confidence: 99%

Peening Techniques for Surface Modification: Processes, Properties, and Applications

et al. 2021

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“…As an alternative to the PWHT, mechanical treatments can be applied to reduce residual stress of welds. The ultrasonic peening treatment (UPT) aims to redistribute residual stresses by eliminating tensile stresses and introducing compressive stresses [17,18]. The principle is the same as hammer peening [19,20] and consists of subjecting the material surface to a plastic compression deformation through a hammer gun that vibrates.…”

Section: Introductionmentioning

confidence: 99%

Analysis of the Process Parameters, Post-Weld Heat Treatment and Peening Effects on Microstructure and Mechanical Performance of Ti–Al Dissimilar Laser Weldings

Leo

D’Ostuni

Nobile

et al. 2021

Metals

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Dissimilar Ti–Al laser weldings are very interesting due to their difficulties in being processed because of the different physical properties of the alloys and the crack formations during cooling and solidification. In this study, the effect of laser offset and defocusing on microstructure, geometry and mechanical properties response of 2 mm thick dissimilar AA6061/Ti-6Al-4V laser welds was analyzed. Moreover, in order to reduce residual stresses, the joints were both heat-treated and mechanically treated by ultrasonic peening. The welds microstructure was found to be martensitic in the Ti-6Al-4V fusion zone, columnar dendritic in the AA6061 fusion zone and partially martensitic in the Ti-6Al-4V heat-affected zone. Intermetallic compounds based on the Al–Ti system were detected at the AA6061/Ti-6Al-4V interface and in the aluminum fusion zone. Both negative defocusing and higher laser offset improved the tensile performance of the welds, mainly by reducing the amount of brittle intermetallic compounds. The stress relaxation heat treatment, leading to the aging of the martensite and the increasing of the size of the intermetallic compound, reduced the tensile strength and ductility of the joints. On the contrary, for dissimilar Al–Ti welds, mechanical treatment was effective in increasing joints ductility and, moreover, corrosion resistance.

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“…Pang et al 15 explained the suitability of using CMT-pulsed transfer mode for welding AA6061-T6 sheets and obtained controlled heat input with full penetration in-comparison to CMT mode. Tian et al 16 performed ultrasonic peening on the CMT welded joints of AA6061-T6 and analysed its effects on the porosity, grain size and mechanical properties of weldments. P erez et al 17 explained the influence of post-weld heat treatment of AA6061-T6 on mechanical properties that gets enhanced.…”

Section: Introductionmentioning

confidence: 99%

“…Tian et al. 16 performed ultrasonic peening on the CMT welded joints of AA6061-T6 and analysed its effects on the porosity, grain size and mechanical properties of weldments. Pérez et al.…”

Section: Introductionmentioning

confidence: 99%

Studies on cold metal transfer welding of aluminium alloy 6061-T6 using ER 4043

Pramod

Shanmugam

Krishnadasan

2020

Proceedings of the Institution of Mechanical Engineers, Part L:

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Aluminium alloy 6061-T6 is utilized in aerospace industry for developing pressure vessel liner. Cold metal transfer is a promising welding process used in fabricating aluminium structures. The present work is focussed to achieve an optimum welding parameter for joining a 3.5-mm thick pressure vessel and to examine the mechanical properties and metallurgical nature of the weldment. The welded joint was evaluated as defect free using radiography test. The joint efficiency (66.61%) and measured microhardness of weldment (59.78 HV) exhibited promising results. The effect of grain coarsening in the heat affected zone (HAZ) and weld zone is attributed to the thermal gradients during welding. Dissipation of small amounts of strengthening elements Si and Mg during welding leads to reduction in mechanical properties. X-ray diffraction peaks revealed the presence of intermetallic Al–Si and Fe–Si in the weld zone. Fractography examination confirms the ductile type of failure in the fractured surface of the tensile samples.

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Effects of ultrasonic peening treatment on surface quality of CMT-welds of Al alloys

Cited by 38 publications

References 18 publications

Peening Techniques for Surface Modification: Processes, Properties, and Applications

Peening Techniques for Surface Modification: Processes, Properties, and Applications

Analysis of the Process Parameters, Post-Weld Heat Treatment and Peening Effects on Microstructure and Mechanical Performance of Ti–Al Dissimilar Laser Weldings

Studies on cold metal transfer welding of aluminium alloy 6061-T6 using ER 4043

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