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Advances in Welding of Aluminum Matrix Composites

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A special issue of Materials (ISSN 1996-1944). This special issue belongs to the section "Advanced Composites".

Deadline for manuscript submissions: closed (20 November 2022) | Viewed by 2907

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Dear Colleagues,

Aluminum matrix composites, as a new kind of material, are characterized by low density, high specific strength, high specific modules, resistance to high temperatures, resistance to radiation, and good dimensional stability. Therefore, they have been widely applied in the fields of aerospace, aviation, and automobile manufacturing and have become the main subject of interest in the research and development of metal matrix composites. However, due to the special organization structure of aluminum matrix composites, such as the big difference of physical properties between basic material and reinforced particles, high-strength welding joints have been difficult to obtain. The poor weldability of aluminum matrix composites is the most serious problem. Research has been concentrated on different welding characteristics of aluminum matrix composites, and the acquisition of high-strength welding joints will be the most important criterion for their wider applications. The goal of this Special Issue is to describe recent developments in this developing research field. Therefore, we invite you to submit manuscripts for this Special Issue. Full papers, communications, and reviews are all welcome.

Dr. Cheng Gu
Dr. Guangjie Feng
Dr. Gaoyang Mi
Guest Editors

Manuscript Submission Information

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Keywords

welding
aluminum matrix composites
solidification
molten pool
metallurgical bonding
microstructure
fluid flow
interface
welding joints

Published Papers (3 papers)

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Editorial

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1 pages, 160 KiB

Open AccessEditorial

Advances in the Welding of Aluminum Matrix Composites: A New Open Special Issue in Materials

by Cheng Gu, Guangjie Feng and Gaoyang Mi

Materials 2022, 15(15), 5335; https://doi.org/10.3390/ma15155335 - 3 Aug 2022

Cited by 1 | Viewed by 934

Abstract

“Advances in the Welding of Aluminum Matrix Composites” is a new open Special Issue of Materials that aims to publish original research and review papers on new scientific and applied research and to make great contributions to advances in the field of welding aluminum matrix composites as well as to the related synthesis, fundamentals, characterization, and application of these materials [...] Full article

(This article belongs to the Special Issue Advances in Welding of Aluminum Matrix Composites)

Research

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22 pages, 7801 KiB

Open AccessArticle

Effect of Step Size on the Formability of Al/Cu Bimetallic Sheets in Single Point Incremental Sheet Forming

by Krzysztof Żaba, Sandra Puchlerska, Łukasz Kuczek, Tomasz Trzepieciński and Piotr Maj

Materials 2023, 16(1), 367; https://doi.org/10.3390/ma16010367 - 30 Dec 2022

Cited by 7 | Viewed by 1547

Abstract

Single Point Incremental Forming (SPIF) is an unconventional forming process that is suitable for prototype production and small lot production due to the economical tooling cost, short lead time, and the ability to create symmetrical and asymmetrical complex geometries without the use of expensive dies. This article presents the effect of the step size Δz of a forming tool made of 145Cr6 tool steel on the formability and maximum forming angle, mechanical properties, hardness, surface roughness, microstructure and texture of bimetallic Al/Cu sheets. Experiments were conducted at a constant rotational speed and feed rate, with the use of rapeseed oil as a lubricant. The tests were carried out with the use of a forming tool on both sides of the bimetallic sheet. The shape and dimensions of the formed elements are determined by non-contact optical 3D scanning. It has been proved that an increase in the step size Δz affects the deterioration of the surface quality of the specimens (an increase in the Ra parameter from 0.2 μm to approximately 3 μm for the step size of 1.2 mm), while a small step size down Δz favours the geometric stability of the samples. With increasing step size (at Δx = Δy = const.), the drawpiece wall continually thinned until the material fractured. Based on the results, it was shown that increasing the step size Δz over 1.1 mm causes cracking of the drawpieces. Furthermore, greater thinning of the Al/Cu sheet was observed in the range of step size Δz between 0.7 and 1.0 mm for aluminum side and step size Δz ≤ 0.6 mm and Δz ≥ 1.1 mm for copper side. It was also found that the mechanical properties of the bimetal sheet decreased as a result of incremental forming. The greatest decrease in strength and ductility was recorded for a pitch of 1.2 mm. Strength decreased from 230 MPa (for sheet in initial state) to approximately 80 MPa, elongation from 12% to approximately 8.5%, and hardness from 120 HV10 for Cu and 60 HV10 for Al to approximately 30 HV10 for both layers. Full article

(This article belongs to the Special Issue Advances in Welding of Aluminum Matrix Composites)

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11 pages, 4525 KiB

Open AccessArticle

Microstructure Evolution and Mechanical Properties of 20%SiC_p/Al Joint Prepared via Laser Welding

by Fei Li, Yiming Jiang, Gaoyang Mi, Mingyang Zhang and Chunming Wang

Materials 2022, 15(17), 6046; https://doi.org/10.3390/ma15176046 - 1 Sep 2022

Cited by 2 | Viewed by 1206

Abstract

SiC particles-reinforced Al matrix composites (SiC_p/AMCs) have been widely used in the aerospace structural components. In this work, 20 vol% SiC_p/2A14 joint was fabricated by laser welding technology. The effects of different laser power/welding velocity on the 20 vol% SiC_p/2A14 joint forming, microstructure evolution and mechanical properties were studied in detail. The results showed that, under the same heat input, the high power/high welding velocity was beneficial to reduce the porosity of SiC_p/2A14 joint and inhibited the formation of brittle phase of Al₄C₃. At 8 kW-133 mm/s welding parameters, the maximum tensile strength of the SiC_p/2A14 joint reached 199 MPa, which is ~64% higher than that of the SiC_p/2A14 joint prepared at 4 kW-66 mm/s welding parameters. By analyzing the fracture morphology and SEM image of SiCp/2A14 joint section, it is was found that the porosity of weld and Al₄C₃ brittle phase were the important factors limiting the strength of SiCp/2A14 joint. This work provides a reference for the process window design of laser welding SiC_p/2A14 composites. Full article

(This article belongs to the Special Issue Advances in Welding of Aluminum Matrix Composites)

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