Fabrication of bimetallic rods by explosive cladding and warm extrusion

Mamalis, A.G.; Szalay, A.; Vaxevanidis, Nikolaos M.; Manolakos, D.E.

doi:10.1016/s0924-0136(98)00042-9

Cited by 33 publications

(14 citation statements)

References 7 publications

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“…There was a gap existing in wavelength of a wave between sample 1,4 and sample 2,3. As shown in figures 4(b), (c), the large waves were found in samples using thicker explosives or bigger stand-off gap, which was in line with the previous researches [16][17][18]. Thicker explosive or larger stand-off gap resulted in the flyer plate achieving higher V p when it collided with the base plate, which leads to the generation of large wave in sample 2 and 3.…”

Section: Methodssupporting

confidence: 88%

“…Durgutlu A [11] and Zamani [15] found that the explosive ratio R, which was related to δ 0 , could contribute to the formation of wavy structure in Cu/Steel composites. Likewise, other researchers considered the relationship between S and the dimension of the wave of the bonding interface and they reported the interface morphology range from straight to wave with the increase of S [1,11,16,17]. It was noted that both of parameters related to the collision velocity V p in previous studies.…”

Section: Introductionmentioning

confidence: 95%

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A dynamic study of effect of multiple parameters on interface characteristic in double-vertical explosive welding

Sun

Shi

Fang

et al. 2020

Mater. Res. Express

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Previous studies focused on the research of single parameters on the bonding quality of explosive welded composite plates. To explore the dynamic influence of multiple parameters on the interface, a VST (velocity, stand-off gap and charge thickness) function was proposed. The three-dimensional diagram clearly and intuitively showed that the collision velocity was comprehensively affected by the explosive thickness and stand-off gap. Four different sets of parameters were chosen and the composite plates were successfully manufactured in the experiment of double vertical explosive welding (DVEW). The interface morphology, element distribution and the mechanical property were discussed respectively. The optical microscope showed that all the samples were wavy interface but the dimensions of the ripples was different. The defects, such as melting layer and island region, appeared less frequently at bonding interface when the collision velocity was lower. The grain refinement, adiabatic shear bands were found at the crest and side of wave respectively. The width of elements diffusion layer of joint increased in line with higher collision velocity. It was indicated the maximum microhardness reached 293HV at the bonding interface due to work hardening. Shear and tensile tests suggested the the mechanical property of large wave was better than that of small wavy interface. The fracture morphology showed obvious stratification and the dimple at the bonding interface was smaller in diameter and less plastic.

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Section: Methodssupporting

confidence: 88%

Section: Introductionmentioning

confidence: 95%

A dynamic study of effect of multiple parameters on interface characteristic in double-vertical explosive welding

Sun

Shi

Fang

et al. 2020

Mater. Res. Express

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“…The fabrication of bimetallic Al sheathed/Cu axisymmetric rods by explosive cladding and subsequent warm extrusion is reported by Mamalis et al. 14 Dyja et al. 15 have presented the results of their theoretical and experimental analysis of the rolling process of bimetallic Cu–steel and Cu–Al rods in stretching passes.…”

Section: Introductionmentioning

confidence: 99%

“…Sun et al 13 studied the bonding characteristics of the Fe-Al clad tube interface by compression, flattening, and compression-shear tests and then used the Fe-Al clad tube to manufacture a T-shape by hydrobulging. The fabrication of bimetallic Al sheathed/Cu axisymmetric rods by explosive cladding and subsequent warm extrusion is reported by Mamalis et al 14 Dyja et al 15 have presented the results of their theoretical and experimental analysis of the rolling process of bimetallic Cu-steel and Cu-Al rods in stretching passes.…”

Section: Introductionmentioning

confidence: 99%

Experimental analysis of bonding strength in shape rolling of Al–Cu bimetallic circular pipes into square tubes

Tajyar

Masoumi

2016

Proceedings of the Institution of Mechanical Engineers, Part C:

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In the present research, the intermetallic layer situation and bond strength of square tubes produced by shape rolling of Al–Cu bimetallic pipes has been investigated. The explosive welding process was used for the production of bimetallic circular pipes. The macro- and microscopic features of explosive-welded pipes and shape-rolled specimens at various stages were experimentally measured by using shear and hardness testing and optical metallography. Moreover, scanning electron microscopy was used for fractography of the fracture surfaces after the last stage of forming. The experimental results showed that the shear strength variation is dependent on the intermetallic layer thickness and its continuity. Also, continuity in Al–Cu interfaces that have a thick intermetallic layer intensifies the microcrack propagation, while due to discontinuity in the thin intermetallic layer, the retardation of catastrophic crack propagation was observed in the early passes of the shape-rolling process. However, the results of the present study showed that as the passes proceed in the rolling process, the crack propagation phenomenon, which is the cause of a decrease in shear strength, is expected.

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“…It consists in surface joining of elements, such as plates [5][6], tubes [7] or bars [8][9] made of different metals [5][6][7][8][9][10][11][12][13]. Its growing popularity this method owes to the fact that it is uncomplicated and relative cheap, while modern variants of explosives are characterized by high safety during their manufacture and use.…”

Section: Introductionmentioning

confidence: 99%

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

Mróz

Szota

Bajor

et al. 2017

Archives of Metallurgy and Materials

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The paper has presented the results of theoretical studies and experimental tests of the plastic deformation of Mg/Al bimetallic specimens. Theoretical studies were carried out using the Forge2011® computer program. Physical modeling, on the other hand, was performed using the Gleeble3800 simulator. Bimetallic bars of an outer diameter of 22.5 mm and a cladding layer thickness of 1.7 mm were obtained by the explosive welding method. Samples for formability tests, characterized by a diameter-to-length ratio of 1, were taken from the bars. The theoretical studies and experimental tests were carried out for the temperature range from 300 to 400°C and for different strain rates. Based on the obtained investigation results it has been found that the main parameters influencing the formability of Mg/Al bimetallic bars are strain rate than the process temperature.

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Fabrication of bimetallic rods by explosive cladding and warm extrusion

Cited by 33 publications

References 7 publications

A dynamic study of effect of multiple parameters on interface characteristic in double-vertical explosive welding

A dynamic study of effect of multiple parameters on interface characteristic in double-vertical explosive welding

Experimental analysis of bonding strength in shape rolling of Al–Cu bimetallic circular pipes into square tubes

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

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