Abstract
The use of copper––high nitrogen stainless steel macrocomposites for applications such as pulsed high magnetic field coils is demonstrated in this contribution. The macrocomposite reveal an enhancement of up to 40% in strength when cooling from 300 K down to liquid nitrogen temperature. An ultimate tensile strength of 1.53 ± 0.017 GPa is reached with a 3 mm × 2 mm wire with 52 vol.-% Cu and a logarithmic drawing strain of η=2.8 at liquid nitrogen temperature. Compared to the low nitrogen stainless steel macrocomposites in use up to now, which have an UTS of 1.02 ± 0.017 GPa and reveal an enhancement of 28% in strength when cooling down, these values related to high nitrogen stainless steel macrocomposites bear great improvements.
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