Phase identification in titanium-rich Ti-Fe system by Mössbauer spectroscopy

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Abstract
Various phases of the titantium rich part of the Ti‐Fe binary system were obtained by thermal treatments and were identified by Mössbauer spectroscopy and x‐ray diffraction. Room‐temperature Mössbauer parameters were derived for the following phases: αm, α, ϑ, ω, β, and TiFe. The range of concentrations for which an athermal ω phase appears upon quenching was found to be 2.7⩽CFe⩽5 wt%. The athermal ω phase disappears during aging at 285 °C for 15 h, when the alloy contains CFe⩽4.0 wt%. Martensite αm was found to form when Fe concentrations were ⩽2.7 wt.%. After quenching from the β field, the β phase retains when the Fe content of the alloy is ⩾2.7 wt.%. The ϑ phase forms during aging at temperatures above 280 °C, for alloys with a Fe content ⩽2.7 wt.%. Room‐temperature Mössbauer parameters are given to enable phases to be indentified and analyzed by means of Mössbauer spectroscopy.