Effect of alloying elements on the behaviour of oxide films at diffusion-welded interfaces of aluminium alloys - Study of surface films at diffusion-welded interfaces (Report 4)

Ohashi, Osamu; Sasabe, Ken

doi:10.1080/09507119009452179

Cited by 6 publications

(2 citation statements)

References 6 publications

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“…Mg reacts with aluminum oxide forming a complex oxide MgAl 2 O 4 [87] or reducing it to Al + MgO [34], which forms inclusions and induces bonding to occur; as a result, the content of Mg is reduced in the joint considerably [31]. e improved wetting of Al-Mg filler alloys was also confirmed by Khorunov et al [31], where Al-Mg filler showed better wetting on titanium alloy OT4 for a temperature less than 700°C comparing with Al-Si.…”

Section: Al-mg-type Filler Alloys Flommentioning

confidence: 99%

Low‐Temperature Brazing of Titanium Using Al‐Based Filler Alloys

Muhrat

Puga

Barbosa

2018

Advances in Materials Science and Engineering

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Brazing of titanium using low melting temperature filler alloys is a preferred choice regarding cost and preserving its mechanical properties. However, brazing titanium at low temperature is still a challenge, especially regarding aluminum-based filler alloys. During the last years, several brazing methods and Al-based fillers were developed to meet industrial requirements; some of them might achieve some of those requirements. e use of ultrasound in brazing has gained increased attention recently, which helps to reduce the time and the necessity for a special brazing environment, subsequently, reducing cost and increasing applicability. Brazing titanium below the α↔β transformation temperature, using commercial and experimental Al-based fillers of different compositions, is presented in this review; including the procedures of traditional and ultrasound-assisted brazing methods. Correspondingly, the effects of brazing conditions and alloying elements on the mechanical properties and the intermetallic compounds formation are examined.

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Section: Al-mg-type Filler Alloys Flommentioning

confidence: 99%

Low‐Temperature Brazing of Titanium Using Al‐Based Filler Alloys

Muhrat

Puga

Barbosa

2018

Advances in Materials Science and Engineering

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“…[8] The use of small additions of Mg, to actively reduce surface oxides of aluminum, has been beneficially used in other aluminum joining research, including fluxless brazing, [22] powder sintering, [27] diffusion welding, [28] metal matrix composite processing, [29] , and joining of metal inserts during casting. [30] A similar chemical reduction mechanism for the sub-oxide spreading of gold-nickel braze alloy on stainless steel was also described by Cohen et al [31] E. Observations of the As-Cast Interface ingots cast with the following process parameters: [10] casting speed 1.27 mm/s, clad pouring temperature 898 K (625°C), and core pouring temperature 973 K (700°C).…”

Section: Possible Aa3003 Surface Oxide Penetration Mechanismsmentioning

confidence: 99%

Interface Formation During Fusion™ Casting of AA3003/AA4045 Aluminum Alloy Ingots

Ciano

Caron

Weckman

et al. 2015

Metall Mater Trans B

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Fusionä casting is a unique Direct Chill continuous casting process whereby two different alloys can be cast simultaneously, producing a laminated ingot for rolling into clad sheet metal such as AA3003/AA4045 brazing sheet. Better understanding of the wetting and interface formation process during Fusionä casting is required to further improve process yields and also explore use of other alloy systems for new applications. In this research, AA3003-core/AA4045-clad ingots were cast using a well-instrumented lab-scale Fusionä casting system. As-cast Fusionä interfaces were examined metallurgically and by mechanical testing. Computational fluid dynamic analyses of the Fusion TM casts were also performed. It was shown that the liquid AA4045-clad alloy was able to successfully wet and create an oxide-free, metallurgical, and mechanically sound interface with the lightly oxidized AA3003-core shell material. Based on the results of this study, it is proposed that the bond formation process at the alloys interface during casting is a result of discrete penetration of AA4045 liquid at defects in the preexisting AA3003 oxide, dissolution of underlying AA3003 by liquid AA4045, and subsequent bridging between penetration sites. Spot exudation on the AA3003 chill cast surface due to remelting and inverse segregation may also improve the wetting and bonding process.

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Technologically significant capillary phenomena in high-temperature materials processing

Weirauch

2005

Current Opinion in Solid State and Materials Science

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Effect of alloying elements on the behaviour of oxide films at diffusion-welded interfaces of aluminium alloys - Study of surface films at diffusion-welded interfaces (Report 4)

Cited by 6 publications

References 6 publications

Low‐Temperature Brazing of Titanium Using Al‐Based Filler Alloys

Low‐Temperature Brazing of Titanium Using Al‐Based Filler Alloys

Interface Formation During Fusion™ Casting of AA3003/AA4045 Aluminum Alloy Ingots

Technologically significant capillary phenomena in high-temperature materials processing

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