Journal of the Japan Institute of Metals and Materials
Online ISSN : 1880-6880
Print ISSN : 0021-4876
ISSN-L : 0021-4876
Investigation of the Ti-rich Ti-Fe-Mn System (1st Report). On the TiMn2-Mn Range of the Binary Ti-Mn System
Yôtaro MurakamiToshio Enjyô
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1958 Volume 22 Issue 5 Pages 261-265

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Abstract
Melting point measurement, microscopic observation, Micro-Vickers hardness measurement and X-ray analysis have been employed to investigate the TiMn2-Mn range of the Ti-Mn system. There exists a binary eutectic reaction of Liquid\ ightleftharpoonsTiMn2+Mn in the TiMn2-Mn range, and the nonvariant reaction is considered to occur at the composition of 83.5 wt% of manganese at about 1185°. The solid solubility range of the TiMn2 phase enlarges from 63.7 wt% to 70.9 wt% of manganese at 1150° and narrows down moderately with decreasing temperature. Its lattice parameters c and a decrease with increase of manganese content, while the axial ratio ca, becomes approximately constant at 1.640. The maximum solubility of titanium in manganese is considered to be about 10 wt% of titanium at the eutectic temperature, and its solubility range seems to narrow down slightly with decreasing temperature.
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