Compositional homogeneity in a medical-grade stainless steel sintered with a Mn-Si additive
Okyay, A., K.
Materials Science and Engineering C
2215 - 2219
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In this paper, chemical composition uniformity in amorphous/ nanocrystallization medical-grade stainless steel (ASTM ID: F2581) sintered with a Mn-Si additive was studied via scanning electron microscopy, energy dispersive X-ray spectroscopy, and transmission electron microscopy. The results show that as a result of sintering at 1000 °C, no dissociation of Mn-Si additive particles embedded in the stainless steel matrix occurs. In contrast, sintering at 1050 °C develops a relatively homogeneous microstructure from the chemical composition viewpoint. The aforementioned phenomena are explained by liquation of the Mn-Si eutectic additive, thereby wetting of the main powder particles, penetrating into the particle contacts and pore zones via capillary forces, and providing a path of high diffusivity.
Energy dispersive X-ray spectroscopy
Local chemical composition
Medical-grade stainless steel
Energy dispersive X ray spectroscopy
Scanning electron microscopy
Transmission electron microscopy
X ray spectroscopy