TIG-bonding of AlSi9/SiC composites

Grabian, J.; Wysocki, J.

doi:10.1080/09507110701444891

Cited by 4 publications

(3 citation statements)

References 7 publications

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“…Dispersion of the intermetallic phase Al 3 Sc in AlMgSc alloys or Al 3 Zr in AlMgZr alloys forms the nucleation pads of fine grains. The fine-grained structure and secretion strengthening favourably shape the course of weld pool crystallisation, resulting in good mechanical weld properties close to those of the parent material [59,60]. Tests carried out on AlMgZr and AlMgSc alloys have shown that:…”

Section: Discussionmentioning

confidence: 99%

“…The manner of crystallisation of the matrix alloy and the influence of the crystallisation front on the distribution of the reinforcing phase, wettability and the product of surface reactions at the liquid metal-ceramic phase interface have a significant impact on the mechanical properties of the weld. Typically, welded microstructures are characterised by a dendritic structure with an uneven distribution of the reinforcing phase in the interdendritic spaces [24][25][26][27][28]. In the case of metal-ceramic composites, the factor of the physical and chemical interactions that occur between the liquid metal and the ceramic reinforcing phase must additionally be considered [29][30][31].…”

Section: Introductionmentioning

confidence: 99%

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Characterisation of a New Generation of AlMgZr and AlMgSc Filler Materials for Welding Metal–Ceramic Composites

Wysocki,

Staude,

Trytek

et al. 2024

Applied Sciences

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When manufacturing the welded joints of components made of metal–ceramic composites of the Al-Si/SiC type, we encounter significant difficulties. This is related to the presence of a ceramic phase in the aluminium alloy matrix. The interaction between the molten metal matrix and the ceramic particles in the weld pool influences a complex of physicochemical phenomena resulting in, among other things, the structure of the welded joint. This is particularly true of the effect of the distribution of ceramic particles and their influence on the crystallisation process in the weld pool. An important issue is the influence of the reinforcing particles on the susceptibility of the aluminium matrix to both hot and cold cracking. The scope of the research included the development of the chemical composition of an additive material for the TIG welding of aluminium–ceramic composites. This material was made in the form of so-called sticks, cast from alloys containing elements such as magnesium, scandium or zirconium in addition to aluminium. The appropriate composition of the mass content of the individual components was intended to change the crystallisation mode of the weld pool and to obtain strengthening precipitates. The most favourable structure was obtained in the case of a modification of the AlMg5 alloy by the addition of scandium. Minor dispersions of Al3Sc became the nucleation pads of fine grains, which improved the mechanical properties of the alloy. Also, in the case of the addition of zirconium, the crystallisation shifted from dendritic to fine-grain growth. In this paper, the basic strength properties of the developed materials were tested and the most favourable chemical compositions of the filling materials were selected.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Characterisation of a New Generation of AlMgZr and AlMgSc Filler Materials for Welding Metal–Ceramic Composites

Wysocki,

Staude,

Trytek

et al. 2024

Applied Sciences

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“…Y. Coo [41] reported that the addition of Ti filler could effectively restrain the formation of brittle AI4C3 phases in TIG welding of A1356-20%SiC MMCs. In another investigation, J. Grabian et al [42] reported that correct selection of beveling type may help to produce visibly defect-free TIG welds of AlSi9-SiC MMC and that the presence of AI4C3 phase was not detected in the weld produced with a Mg containing filler (5356). In a comparative study of the MIG welding of Al-TiC composites by using direct and indirect electric arc, the composite materials exhibited a good degree of weldability [43].…”

Section: Fusion Welding Processesmentioning

confidence: 99%

Joining of Al-B4C metal matrix composites by laser welding and friction stir welding /

Guo¹

2012

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AI-B4C MMCs are important materials as neutron absorber in spent nuclear fuel storage and transportation due to their high boron ( 10 B) concentration and thus high neutron absorption capability. However, wide application of these materials is still limited due to the lack of suitable joining techniques to fully take advantage of the materials. Problems such as porosity and chemical reaction between Al matrix and B4C particles can arise during fusion welding of the material. Therefore, the present study is intended to find effective and reliable welding techniques for AI-B4C MMCs. The weldability of AA1100-16%B 4 C (particle size: 11 pirn) and AA1100-30%B 4 C MMCs (median particle size: 15 pirn) was evaluated using laser welding and friction stir welding. In comparison with conventional arc welding techniques, the deep and narrow fusion zones associated with laser welding can result in smaller heat affected zones, and thus less thermal distortion and mechanical property degradation. On the other hand, friction stir welding, as a solid state process, seems promising as it can avoid various problems that may otherwise be encountered during fusion welding of MMCs.For laser welding without filler, it was found that most B4C particles were decomposed during welding leading to formation of needle-like AIB2 and AI3BC phases in the weld. In this case, a joint efficiency of 63% (UTS) after tensile test was obtained. The variation of laser power from 2 to 4 kW and welding speed from 1 to 2.5 m/min did not affect the needle-like morphology. Based on thermodynamic calculation, Ti filler was used as the filler material aiming to improve the properties of laser joints. It was found that the addition of Ti with 150 |nm thick foil increased the joint efficiency to 75% due to the decrease of size and quantities of needle-like phases. The addition of Ti with filler wire instead of Ti foil did not show significant mechanical property improvement due to the Ti segregation and microstructure inhomogeneity in the weld zone.On the other hand, the feasibility of friction stir welding for joining AA1100 based metal matrix composites reinforced with B 4 C particulate was studied for 16 and 30%B 4 C volume concentrations. For both composites, friction stir welding has a significant influence on the particle size distribution and the matrix grain size. For the AA1100-16%B4C composite, the average particle size decreases after welding by -20% and the grain size from 15 to 5 [xm as measured in the weld nugget. Tensile testing of welded joints showed up to 100% joint efficiency for both annealed AA1100-16%B 4 C and AA1100-30%B4C composite materials. However, if the ultimate tensile strength values of all the studied composites are similar at -130 MPa, the weld ductility is higher for the annealed materials. In addition, it was observed that varying the welding speed between 100 and 275 mm/min does not influence the joint tensile properties and the particle size distribution in the nugget. Furthermore, a welding tool made of WC-Co show...

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The Impact Abrasive Wear Resistance and Mechanical Properties of In Situ NbC-Reinforced H13 Steel Composites

Liu,

Zhou,

Jiang

et al. 2023

J. of Materi Eng and Perform

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TIG-bonding of AlSi9/SiC composites

Cited by 4 publications

References 7 publications

Characterisation of a New Generation of AlMgZr and AlMgSc Filler Materials for Welding Metal–Ceramic Composites

Characterisation of a New Generation of AlMgZr and AlMgSc Filler Materials for Welding Metal–Ceramic Composites

Joining of Al-B4C metal matrix composites by laser welding and friction stir welding /

The Impact Abrasive Wear Resistance and Mechanical Properties of In Situ NbC-Reinforced H13 Steel Composites

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