This paper focuses on the structure and mechanical properties of powder metallurgy stainless steels
(Fe–Cr–Mn–Mo–Si–N–C) developed for biomedical applications. The samples were prepared by mechanical
alloying and subsequent liquid-phase sintering with a eutectic Mn–Si alloy additive. By changing the
sintering aid content, the pore configuration, compressive strengths, and impact properties of the samples
were assessed. The Rietveld X-ray diffraction analysis showed after sintering at 1050 C for
60 min followed by water-quenching, a nanocrystalline austenitic structure was formed in the material.
According to the mechanical experiments, by increasing the additive content from 0 wt% to 6 wt%, sintering
densification, yield stress, compression strength, and absorbed impact energy were improved, where
spoiling occurred when adding 8 wt% additive. Also, as realized from the impact fracture surface features,
despite the presence of some unmelted additive particles, the role of the pore elimination in toughness
prevailed over that of these particles
This paper focuses on the structure and mechanical properties of powder metallurgy stainless steels
(Fe–Cr–Mn–Mo–Si–N–C) developed for biomedical applications. The samples were prepared by mechanical
alloying and subsequent liquid-phase sintering with a eutectic Mn–Si alloy additive. By changing the
sintering aid content, the pore configuration, compressive strengths, and impact properties of the samples
were assessed. The Rietveld X-ray diffraction analysis showed after sintering at 1050 C for
60 min followed by water-quenching, a nanocrystalline austenitic structure was formed in the material.
According to the mechanical experiments, by increasing the additive content from 0 wt% to 6 wt%, sintering
densification, yield stress, compression strength, and absorbed impact energy were improved, where
spoiling occurred when adding 8 wt% additive. Also, as realized from the impact fracture surface features,
despite the presence of some unmelted additive particles, the role of the pore elimination in toughness
prevailed over that of these particles
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