Compression test

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Work-hardened Cu: experimental (no lubricant)
Work-hardened Cu: experimental (with lubricant)
Work-hardened Cu: FEM (μ=0)
Work-hardened Cu: FEM (μ=0.1)
Work-hardened Cu: FEM (μ=0.3)
Work-hardened Cu: FEM (μ=0.5)

Annealed Cu: experiment (no lubricant)
Annealed Cu: experiment(with lubricant)
Annealed Cu: FEM (μ=0)
Annealed Cu: FEM (μ=0.1)
Annealed Cu: FEM (μ=0.3)
Annealed Cu: FEM (μ=0.5)

σ_VM (MPa)

ε_VM

Axis of
symmetry

Original
sample
surface

	Annealed Cu	Work-hardened Cu

σ_Y (MPa)	15 475 0.47	254 150 0.79
K (MPa)
n (-)

Friction coefficient μ (-)
0
0.1
0.3
0.5