The Effect of Ultrasonic Peening Treatment on Fatigue Performance of Welded Joints

Zhao, Xiaohui; Wang, Mingyi; Zhang, Zhiqiang; Liu, Yu

doi:10.3390/ma9060471

Cited by 23 publications

(12 citation statements)

References 23 publications

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“…This zone is caused by severe plastic deformation and recrystallization; (ii) zone of plastic deformation with compressive residual stress, but without recrystallization. This zone has a depth of more than 200 µm for titanium alloys [15]; (iii) zone of stress relaxation with a depth of several millimeters [12]. For SLM, the thickness of the deposited layer is about 30-200 µm.…”

Section: Introductionmentioning

confidence: 99%

“…UIT can provide a number of beneficial effects on the surface region of alloys by introducing compressive plastic deformation. According to the different treatment effects, the surface can be divided into three zones, as shown in Figure 1b [12]: (i) zone of grain refinement at the top surface. Its depth is about 10-30 µm for titanium alloys [13,14].…”

Section: Introductionmentioning

confidence: 99%

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Residual Stress, Defects and Grain Morphology of Ti-6Al-4V Alloy Produced by Ultrasonic Impact Treatment Assisted Selective Laser Melting

et al. 2016

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For large-scale selective laser melting (SLM) additive manufacturing technology, three main problems severely restrict its development and application, namely the residual stress, defects, and columnar grains with anisotropy. To overcome these problems, a new method is proposed by combining SLM with ultrasonic impact treatment (UIT) technique. This study explores the feasibility of UIT assisted SLM, as well as the effect of UIT on the residual stress, defects and β grains of Ti-6Al-4V alloy sample. The results indicate that after the application of UIT during SLM, residual stress can be largely reduced and defects can be hammered flat and even eliminated. Meanwhile, the epitaxial growth of columnar grains is prevented, and fine equiaxed grains are formed due to plastic deformation and recrystallization.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Residual Stress, Defects and Grain Morphology of Ti-6Al-4V Alloy Produced by Ultrasonic Impact Treatment Assisted Selective Laser Melting

et al. 2016

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“…For structures subjected to static loads, such notches are relatively easy to consider in the assessment of load-bearing capacity and changes in stiffness. A much worse situation is in the case of components and structures subjected to dynamic or cyclic loads [4,5].…”

Section: Introductionmentioning

confidence: 99%

The Methacrylate Adhesive to Double-Lap Shear Joints Made of High-Strength Steel—Experimental Study

et al. 2019

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In typical technical applications, steel components are usually connected by welding or with mechanical connectors. An alternative solution, typical in the aviation and automotive industry, but not widespread in engineering structures, is to join thin sheet metal using adhesives. The article presents an experimental study of adhesive joints used in overlap connections subjected to static tension. A methacrylate adhesive, selected experimentally from a range of adhesives, which combines the optimum strength and strain properties, was tested. The laboratory tests were carried out on double-lap specimens made of high-strength Domex 700 steel. On the basis of the experimental results, the behavior of the specimens and their failure mechanism, depending on the anchorage lengths used (200, 300 and 400 mm), are described. The tests confirmed the effectiveness of the selected methacrylate adhesive in a practical application. It was shown that with the appropriate anchorage length (adequate to the type of steel components and the joint geometry) between 300 and 400 mm, the capacity of the adhesive joint is higher than the capacity of a single steel component. Two types of specimen behavior were recognized: Quasi-brittle, which occurs at the anchorage length of 200 mm, and ductile, observed for 300 mm and 400 mm anchoring. In addition, thanks to the optical measurement method used, a detailed strain distribution on the specimen surface was determined. The data will be used for subsequent validation of an analytical and numerical model.

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“…It is well-known that, surface roughness and surface integrity resulting from net-shape processing can largely determine the fatigue life and corrosion resistance of all kinds of metal materials [ 2 , 3 , 4 ]. Moreover, fatigue failure which generally develops on particular surface areas of engineering parts such as sharp corners, or welding points [ 5 , 6 , 7 ], is closely related to the surface qualities, such as surface roughness and residual stress. So, it is believed that surface treatment is a necessary procedure for better applications of metal materials.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation on Surface Quality Processed by Self-Excited Oscillation Pulsed Waterjet Peening

Ding

Kang

et al. 2017

Materials

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High-speed waterjet peening technology has attracted a lot of interest and is now being widely studied due to its great ability to strengthen metal surfaces. In order to further improve the mechanical properties of metals, self-excited oscillation pulsed waterjets (SOPWs) were used for surface peening with an experimental investigation focused on the surface topography and properties. By impinging the aluminum alloy (5052) specimens with SOPWs issuing from an organ-pipe oscillation nozzle, the hardness and roughness at various inlet pressures and stand-off distances were measured and analyzed, as well as the residual stress. Under the condition of optimum stand-off distances, the microscopic appearances of peened specimens obtained by SEM were displayed and analyzed. Results show that self-excited oscillation pulsed waterjet peening (SOPWP) is capable of improving the surface quality. More specifically, compared with an untreated surface, the hardness and residual stress of the peened surfaces were increased by 61.69% and 148%, respectively. There exists an optimal stand-off distance and operating pressure for creating the highest surface quality. SOPWP can produce almost the same enhancement effect as shot peening and lead to a lower surface roughness. Although such an approach is empirical and qualitative in nature, this procedure also generated information of value in guiding future theoretical and experimental work on the application of SOPWP in the industry practice.

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The Effect of Ultrasonic Peening Treatment on Fatigue Performance of Welded Joints

Cited by 23 publications

References 23 publications

Residual Stress, Defects and Grain Morphology of Ti-6Al-4V Alloy Produced by Ultrasonic Impact Treatment Assisted Selective Laser Melting

Residual Stress, Defects and Grain Morphology of Ti-6Al-4V Alloy Produced by Ultrasonic Impact Treatment Assisted Selective Laser Melting

The Methacrylate Adhesive to Double-Lap Shear Joints Made of High-Strength Steel—Experimental Study

Experimental Investigation on Surface Quality Processed by Self-Excited Oscillation Pulsed Waterjet Peening

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