Interface Reactions of Al and Binary Al-Alloys on Mild Steel Substrates in Controlled Atmosphere

Fragner, Werner; Zberg, Bruno; Sonnleitner, Robert; Uggowitzer, Peter J.; Löffler, Jörg F.

doi:10.4028/www.scientific.net/msf.519-521.1157

Cited by 14 publications

(8 citation statements)

References 18 publications

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“…[3][4][5][6] The bonding between Al and Fe could be physical, mechanical and/or chemical type. 7 The interaction between Al and Fe is, however, a challenging concept due to their insolubility and the formation of hard and brittle intermetallic phases (IMPs) in the joint area, as shown in Fig. 1.…”

Section: Introductionmentioning

confidence: 99%

Cast joining of cast iron to aluminium casting matrix

Moosavi-Khoonsari

Jalilian

Paray

et al. 2011

Materials Science and Technology

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The present study focused on reinforcing Al–Si–Cu alloy with a cast iron insert and using Zn– xAl–3Si–0·5Mg (wt-) intermediate alloys by the cast joining technique to take advantage of lightness and stiffness of the hybrid structure. The experimental set-up consisted of coating the insert using hot dipping method followed by immersing the coated insert into the Al melt and allowing the system to cool down to the room temperature. The quality of Al–Fe joints in terms of morphology, thickness, chemistry and microhardness was evaluated as a function of coating composition and immersion time in the Al melt. Characteristics of reaction layer at the coating/insert interface and its effects on the joint properties were determined using microstructural analysis and thermodynamic calculations. Combination of a suitable coating containing 27 wt-Al and optimised process parameters, including 1 min immersion time, resulted in the formation of an Al–Fe joint with promising characteristics.

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Section: Introductionmentioning

confidence: 99%

Cast joining of cast iron to aluminium casting matrix

Moosavi-Khoonsari

Jalilian

Paray

et al. 2011

Materials Science and Technology

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“…This chemical reactivity of ferrous substrates with aluminium-silicon alloys in the liquid state has already been the subject of a lot of investigations. [4,[7][8][9][10][11][12][13][14][15][16][17][18][19] By carefully controlling the casting procedure and the cooling rate, growth of these compounds between an iron base insert and Al-Si alloys can be limited such that the total thickness of the reaction zone does not exceed a few micrometers. Under these conditions, a mechanically strong and tough bond can be established at the insert/alloy interface.…”

Section: Introductionmentioning

confidence: 99%

Chemical Changes at the Interface Between Low Carbon Steel and an Al-Si Alloy During Solution Heat Treatment

Zhe

Dezellus

Gardiola

et al. 2011

J. Phase Equilib. Diffus.

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The aim of this work was to characterize the chemical changes during solid state solution heat treatment of a metallurgically bonded steel/Al-Si interface. For this purpose, low carbon steel plates covered with the A-S7G03 aluminium alloy (7 wt.% Si, 0.3 wt.% Mg analogous to A356) were prepared by dip coating, water-quenching to room temperature and reheating in the solid state at 480-560°C for 3-160 h. Upon reheating at 535°C, a reaction layer was observed to grow at the interface between steel and the iron-saturated Al-Si alloy. As long as an intimate contact could be maintained, the total thickness, x, of the reaction layer increased with time, t, according to a nearly parabolic growth law x 2 = KAEt 2 b. At 535°C, the value of the growth constant was K = 4.045310 214 m 2 s 21 . This constant was found to be thermally activated [K = K 0 exp(2Q/ RT)] with K 0 = 4.37310 24 m 2 s 21 and Q = 153 kJ mol 21 . The whole chemical interaction process was controlled by solid state volume diffusion and the reaction layer sequence corresponded to a diffusion path in the Al-Fe-Si phase diagram. A striking feature of the reaction process is the unbalanced diffusion of aluminium atoms through the reaction zone which rapidly results in the formation of Kirkendall voids. As these voids coalesce, solid state diffusion becomes more and more difficult and the steel/alloy bond gets weakened. Oxidation appears to be an aggravating factor, where applicable.

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“…Based on the result of the EDS point analysis, the phase was identified [9,10]. Sample #1 was identified as intermetallic compounds FeAl 3 and τ 5 -Fe 2 Al 7 Si and Sample #2 was identified as a mixture of several phases of Al, Si, Zn and Fe.…”

Section: Resultsmentioning

confidence: 99%

Archives of Metallurgy and Materials

Kim¹,

Kim²,

Shin³

et al. 2019

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In this study, we investigated the bonding mechanism of surface-treated steel with an Al-Si alloy in order to produce steelaluminum (STL-Al) hybrid composite materials by cast-bonding. The results showed that there are differences in the phase and properties of the hybrid composite materials bonded specimens depending on the surface treatment of the steel sheet used, and that the bonding conditions can be controlled further by detailed conditions of the surface treatment. Based on the interfacial bonding strengths measured here, the galvanized surface treatment induced metallurgical bonding to form a reaction layer on the bonding surface and was determined to be the most effective surface treatment.

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Interface Reactions of Al and Binary Al-Alloys on Mild Steel Substrates in Controlled Atmosphere

Cited by 14 publications

References 18 publications

Cast joining of cast iron to aluminium casting matrix

Cast joining of cast iron to aluminium casting matrix

Chemical Changes at the Interface Between Low Carbon Steel and an Al-Si Alloy During Solution Heat Treatment

Archives of Metallurgy and Materials

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