Table 5 Ideal energy absorption efficiency and plateau stress of the 60–80% porous Cu.

From: Effects of the space holder size on the pore structure and mechanical properties of porous Cu with a wide porosity range

x, %

Ideal energy absorption efficiency, ηIebe/%

Plateau stress, σpl/MPa

1.7–2 mm

2–3 mm

RηIebe, %

1.7–2 mm

2–3 mm

Rσpl, %

60

60.30 ± 4.72

56.56 ± 4.05

3.20(-)

31.62 ± 3.32

28.55 ± 2.59

5.10(-)

70

63.03 ± 7.90

65.09 ± 9.10

1.61(+)

13.06 ± 1.28

14.31 ± 1.37

4.57(+)

80

78.91 ± 12.68

81.35 ± 9.90

1.52(+)

4.32 ± 1.83

2.35 ± 0.70

2.95(-)

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