Theoretical and Experimental Analysis of Formability of Explosive Welded Mg/Al Bimetallic Bars

Mróz, S.; Szota, P.; Bajor, T.; Stefanik, A.

doi:10.1515/amm-2017-0074

Cited by 10 publications

(23 citation statements)

References 15 publications

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“…The shape of two developed groove systems is shown in Figure 3. Temperature-deformation parameters were selected based on the results of physical and numerical modelings of compression tests of two-layer Mg/Al samples [39,40]. The rolling process was conducted for two temperatures: 300 and 400 • C. After each pass, the samples were reheated to the rolling temperature.…”

Section: Methodsmentioning

confidence: 99%

“…The bimetallic feedstock was heated in the LAC KC 120/14 (LAC, Židlochovice, Czech Republic) resistance chamber furnace before rolling and before the individual passes. Temperature-deformation parameters were selected based on the results of physical and numerical modelings of compression tests of two-layer Mg/Al samples [39,40]. The rolling process was conducted for two temperatures: 300 and 400 °C.…”

Section: Methodsmentioning

confidence: 99%

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Effect of the Shape of Rolling Passes and the Temperature on the Corrosion Protection of the Mg/Al Bimetallic Bars

et al. 2021

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The paper presents the results of experimental tests of the rolling process of Mg/Al bimetallic bars in two systems of classic passes (horizontal oval-circle-horizontal oval-circle variant I) and modified (multi-radial horizontal oval-multi-radial vertical oval-multi-radial horizontal oval-circle-variant II). The feedstock in the form of round bimetallic bars with a diameter of 22 mm and 30% of the outer aluminum layer was made through explosive welding. The bimetallic bars consisted of an AZ31 magnesium core and a 1050A aluminum outer layer. Bars with a diameter of 17 mm were obtained as a result of rolling in four passes. The rolling process in the passes was conducted at two temperatures of 300 and 400 °C. Based on the analysis of the test results, it was found that the use of modified passes and a lower rolling temperature (300 °C) ensures a more homogenous distribution of the plating layer around the circumference of the core and results in an even grain decreasing, which improves the corrosion resistance of bimetallic bars compared to rolling bars in a classic system of passes and at a higher temperature (400 °C).

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Effect of the Shape of Rolling Passes and the Temperature on the Corrosion Protection of the Mg/Al Bimetallic Bars

et al. 2021

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“…However, for bimetallic parts to operate properly, they have to be made of high quality materials that can be permanently joined over the entire contact surface. Depending on the intended use and required mechanical properties, bimetallic materials can be joined by bonding, adhesive bonding, press-fitting, or shrink-fitting [2][3][4][5][6]. Bimetallic materials for the production of machine parts that carry larger loads are typically welded or fusion-welded [7][8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Skew Rolling of Bimetallic Rods

et al. 2020

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The present article reports selected results of a preliminary study of the process of skew rolling of bimetallic rods. The experiments were conducted using a numerically controlled three-roller skew rolling mill. During the tests, bimetallic rods were rolled from billets whose cores and outer sleeves (bushings) were made of different types of steel. The results demonstrate that the proposed method can be successfully used in the production of bimetallic rods. However, proper fastening of the two materials depends on the geometrical parameters of the billets, and the quality of bimetallic rods depends on the heating method used. When the rods are heated without protective atmospheres, the surface layer of the core gets decarburized and the surfaces of the materials being joined together are oxidized, which hinders the welding process and adversely affects the physical and chemical properties of such products. The results of numerical modeling indicate that the material near the surface tends to flow, which may have a negative impact on the welding process. In addition, the distribution of stress in the tool–workpiece contact zone may make welding of the materials difficult. The results reported in this paper are preliminary and constitute a prelude to a more detailed analysis of bimetallic rod rolling.

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“…The third and final process is heat treatment. However, in the case of multilayer products, it often causes the formation of intermetallic phases (even layers), which in turn, generate microcracks or delamination of the welded materials [24][25][26][27][28][29][30][31][32][33][34]. Usually delamination of the welded materials occurs as effect of improper heat treatment [10,18,24,34].…”

Section: Introductionmentioning

confidence: 99%

“…The presented example of the implementation of Al/Cu bimetal refers to the condition where copper is the outer layer in the finished product. As mentioned above, a problem that occurs very often in the manufacturing process of multilayer products, is the occurrence of intermetallic phases [7,[9][10][11][12][13][14][15][16][17][18][19][20]25,27,[29][30][31][32][33][34]. In bimetals of the Cu/Al type, a very commonly observed phase is CuAl 2 (gray-brown area in Figure 3).…”

Section: Introductionmentioning

confidence: 99%

The Analysis of Pressed Cups Producing Possibilities from Rolled Bimetallic Al-1050 + Cu-M1E Sheets

et al. 2020

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Drawability tests of metal sheets are known and used as technological processes that allow assessing possibilities of plastic forming. One such test is the cupping test, which is very useful for examining thin sheets of both uniform and multilayer materials. In this work, a comprehensive analysis of the shaping of the bimetallic product Al–Cu (Al-1050 + Cu-M1E) was carried out. The research covers the entire production cycle, from explosive-welding, through asymmetric rolling (ASR) to deep drawing. The scientific and cognitive aspect of the work is to determine the potential of plastic-forming processes without the need for interoperational heat treatments. Tests were carried out for two variants of bimetals used in tools: matrix–Al-1050 + Cu-M1E and matrix–Cu-M1E + Al-1050.

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Theoretical and Experimental Analysis of Formability of Explosive Welded Mg/Al Bimetallic Bars

Cited by 10 publications

References 15 publications

Effect of the Shape of Rolling Passes and the Temperature on the Corrosion Protection of the Mg/Al Bimetallic Bars

Effect of the Shape of Rolling Passes and the Temperature on the Corrosion Protection of the Mg/Al Bimetallic Bars

Skew Rolling of Bimetallic Rods

The Analysis of Pressed Cups Producing Possibilities from Rolled Bimetallic Al-1050 + Cu-M1E Sheets

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