Microstructural and X-ray tomographic analysis of damage in extruded aluminium weld seams

Bakker, A.; Wu, Xiaomin; Katgerman, L.; Zwaag, Sybrand van der

doi:10.1179/1743284714y.0000000615

Cited by 13 publications

(4 citation statements)

References 41 publications

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“…In paper [30], a study on non-destructive testing is presented, utilizing micro-focused X-ray tomography to comprehensively evaluate welds, including internal defects such as cracks and pores. Furthermore, paper [31] employs X-ray CT to analyze the progression of damage in extrusion welds nearing failure.…”

Section: Methodsmentioning

confidence: 99%

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Exploring the Potential Application of an Innovative Post-Weld Finishing Method in Butt-Welded Joints of Stainless Steels and Aluminum Alloys

Łastowska,

Starosta,

Jabłońska

et al. 2024

Materials

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The prerequisite of the weld bead finishing is intricately linked to the quality of the welded joint. It constitutes the final, yet pivotal, stage in its formation, significantly influencing the reliability of structural components and machines. This article delineates an innovative post-weld surface finishing method, distinguished by the movement of a specialized cutting tool along a butt weld. This method stands out due to its singular approach to machining allowance, wherein the weld bead height is considered and eradicated in a single pass of the cutting tool. Test samples were made of AISI 304L, AISI 316L stainless steels and EN AW-5058 H321, EN AW-7075 T651 aluminum alloys butt-welded with TIG methods. Following the welding process, the weld bead was finished in accordance with the innovative method to flush the bead and the base metal’s surface. For the quality control of welded joints before and after the weld finishing, two non-destructive testing methods were chosen: Penetrant Testing (PT) and Radiographic Testing (RT). This article provides results from the examination of 2D profile parameters and 3D stereometric characteristics of surface roughness using the optical method. Additionally, metallographic results are presented to assess changes in the microstructure, the microhardness, and the degree of hardening within the surface layer induced by the application of the innovative post-weld finishing method.

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Section: Methodsmentioning

confidence: 99%

“…and pores. Furthermore, paper [31] employs X-ray CT to analyze the progression of damage in extrusion welds nearing failure.…”

Section: Methodsmentioning

confidence: 99%

Exploring the Potential Application of an Innovative Post-Weld Finishing Method in Butt-Welded Joints of Stainless Steels and Aluminum Alloys

Łastowska,

Starosta,

Jabłońska

et al. 2024

Materials

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“…Thus, defects in railheads could be visualized and on this basis, a 3D model of crack structures was created [15]. Microstructural and CT analyses could reveal voids in extruded aluminum weld seams [16]. X-ray dark-field CT was used to investigate microstructural changes induced in macroscopically homogeneous materials during friction stir welding.…”

Section: Offline Characterization Of the Weld Seam Geometry And Weld Defectsmentioning

confidence: 99%

A Novel Approach to the Holistic 3D Characterization of Weld Seams – Paving the Way for Deep Learning-Based Process Monitoring

Schmoeller

Stadter

Kick

et al. 2021

Preprint

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In an industrial environment, the quality assurance of weld seams requires extensive efforts. The most commonly used methods for that are expensive and time-consuming destructive tests, since quality assurance procedures are difficult to integrate into production processes. Beyond that, available test methods allow only the assessment of a very limited set of characteristics. They are either suitable for determining selected geometric features or for locating and evaluating internal seam defects. The presented work describes an evaluation methodology based on microfocus X-ray computed tomography scans (µCT scans) which enable the 3D characterization of weld seams, including internal defects such as cracks and pores. A 3D representation of the weld contour, i.e., the complete geometry of the joint area in the component with all quality-relevant geometric criteria, is an unprecedented novelty. Both the dimensions of the weld seam and internal defects can be revealed, quantified with a resolution down to a few micrometers and precisely assigned to the welded component. On the basis of the methodology developed within the framework of this study, the results of the scans performed on the alloy AA 2219 can be transferred to other aluminum alloys. In this way, the data evaluation framework can be used to obtain extensive reference data for the calibration and validation of inline process monitoring systems employing Deep Learning-based data processing.

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“…Extensive studies have been devoted to microstructural characterization of welding interfaces, e.g., wavy patterns, intermetallic compositions and defects [14,15,17]. Three-dimensional xray computed tomography (XCT) has been widely utilized as a powerful, non-destructive, tool in microstructure characterization of various materials, e.g., composites, foams, granular ma-terials and similar welding metals, with µm spatial resolution [18][19][20][21][22]. However, XCT characterization of the weld between dissimilar metals has been scarcely reported.…”

Section: Introductionmentioning

confidence: 99%

Deformation and fracture of explosion-welded Ti/Al plates: A synchrotron-based study

Huang

Bie

Sun

et al. 2016

Materials Science and Engineering: A

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Explosion-welded Ti/Al plates are characterized with energy dispersive spectroscopy and x-ray computed tomography, and exhibit smooth, well-jointed, interface. We perform dynamic and quasi-static uniaxial tension experiments on Ti/Al with the loading direction either perpendicular or parallel to the Ti/Al interface, using a mini split Hopkinson tension bar and a material testing system in conjunction with time-resolved synchrotron x-ray imaging. X-ray imaging and strain-field mapping reveal different deformation mechanisms responsible for anisotropic bulk-scale responses, including yield strength, ductility and rate sensitivity. Deformation and fracture are achieved predominantly in Al layer for perpendicular loading, but both Ti and Al layers as well as the interface play a role for parallel loading. The rate sensitivity of Ti/Al follows those of the constituent metals. For perpendicular loading, single deformation band develops in Al layer under quasi-static loading, while multiple deformation bands nucleate simultaneously under dynamic loading, leading to a higher dynamic fracture strain. For parallel loading, the interface impedes the growth of deformation and results in increased ductility of Ti/Al under quasi-static loading, while interface fracture occurs under dynamic loading due to the disparity in Poisson's contraction.

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Microstructural and X-ray tomographic analysis of damage in extruded aluminium weld seams

Cited by 13 publications

References 41 publications

Exploring the Potential Application of an Innovative Post-Weld Finishing Method in Butt-Welded Joints of Stainless Steels and Aluminum Alloys

Exploring the Potential Application of an Innovative Post-Weld Finishing Method in Butt-Welded Joints of Stainless Steels and Aluminum Alloys

A Novel Approach to the Holistic 3D Characterization of Weld Seams – Paving the Way for Deep Learning-Based Process Monitoring

Deformation and fracture of explosion-welded Ti/Al plates: A synchrotron-based study

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