Mechanical characterisation of laser surface alloyed aluminium–copper systems

Laser cladding of MMC coatings on aluminium substrate: influence of composition and microstructure on mechanical properties

“…Under dynamic conditions, zones of phase existence can be modified and the eutectic composition shifted to the silicon side of the diagram in case of rapidly solidified Al-Si alloys [21]. Similar phenomenon can be observed on Al-Cu alloys carried out by laser surface treatments [10]. With Si contents higher than 30 wt.%, the microstructure consisted in intact TiC particles, primary angular Si crystals surrounded by a-At denditric halos and branched Al/Si eutectic adjacent to the Al halos (see Fig.…”

“…Several authors have already investigated the formation of intermetallic aluminium compounds (alloys AI-Ni [1,3], AI-Fe [8], AI-Cu [9,10], AI-Mo [11] and Al-Cr [12]) and the silicon precipitation in Al-Si alloys [13,14]. Another field of study have consisted in the development of metal matrix composites (MMC) coatings.…”

Optimization of Laser Cladding Process Using Taguchi and EM Methods for MMC Coating Production

“…Many studies on laser surface treatment have been carried out with the goal of improving the mechanical characteristics of cladded coatings (hardness, elastic modulus and wear resistance). These studies are done on steel [3][4], aluminium [5][6][7][8][9][10][11] and magnesium [12] substrates. Several authors have already investigated the formation of intermetallic compounds such as AlyXz(alloys AI-Ni [5], AIFe [6], AI-Cu [7], AI-Mo [8] and AI-Cr [9]) for aluminium treatment and MgyXz (alloys Mg-Al [12]) for magnesium treatment.…”

Organometallic Access to Intermetallic θ‐CuE2 (E = Al, Ga) and Cu1–xAlx Phases

“…[6] niques [11][12][13][14][15][16] and certain thin film or interfacial reactions. [17,18] The solid-state reaction between Al and Cu powders during high-energy ball milling revealed the formation of only γ-Cu 9 Al 4 for the composition Cu 1-x Al x (0.3 Յ x Յ 0.7). Obviously, this particular phase exhibits the largest driving force under such conditions.…”

“…[11] Interfacial reactions of copper and aluminum multilayer films, however, lead to the formation of the θ-CuAl 2 phase even with an excess amount of Cu. [17,18] With an increase in the sintering time and/or temperature, the γ-Cu 9 Al 4 phase is formed. However, in solid-state reactions between Cu and Al during mechanical alloying and heat treatment, it was found that γ-Cu 9 Al 4 or θ-CuAl 2 is formed as the first phase, depending on the molar ratios of the starting materials taken and the reaction conditions.…”