Fig. 1 High-velocity impact welding experimental setup with stand-off block
Fig. 2 Types of interfacial morphology in impact welding, between nickel and steel(grade 1008), (a) a straight interfacial morphology, (b) wave interfacial morphology, (c) wave with vortices interfacial morphology
Fig. 3 Numerical analysis 2D-model with flyer and base plates.
Fig. 4 Interfacial morphology between flyer and base plate. (a) ~ (c) is results from impact velocity υ=200m/s and impact angle β=10º, 15º, 20º, (d) ~ (f) is results from impact velocity υ=400m/s and impact angle β=10º, 15º, 20º, (g) ~ (i) is results from impact velocity υ=600m/s and impact angle β=10º, 15º, 20º
Fig. 5 Measurements of interfacial morphology ,include wave-height(H), period(λ), and ,length(L).
Fig. 7 At time 5μs, (a) is result from impact velocity 400m/s, avg. welding velocity V is 1.6km/s, and impact angle 15º. (b) is result from impact velocity 400m/s, agv. welding velocity V is 1.2km/s, and impact angle 20º.
Fig. 8 At time 3μs, (a) is result from impact velocity 600m/s, avg. welding velocity V is 2.5km/s, and impact angle 15º. (b) is result from impact velocity 600m/s, avg. welding velocity V is 1.9km/s, and impact angle 20º.
Fig. 9 Resultant velocity of jet phenomenon ((a) is 10º, (b) is 15º, (c) is 20º).
Fig. 6 Interfacial morphology increasing its size according to y direction results from impact velocity 600m/s and impact angle 20º
Table. 1 Material properties used in numerical simulation by SPH analysis[2, 11]
Table. 2 Results of wave-period(λ) from analysis except 200m/s cases.
Table. 3 Results of wave-height(H) from analysis except 200m/s cases.
Table. 4 Results of wave-length(L) from analysis except 200m/s cases.
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