<報文>Fe-MnおよびFe-Mn-C合金のマルテンサイト変態に関する研究

概要

論文の詳細を見る
The effects of manganese concentration and carbon addition on the martensitic transformation temperatures in Fe-Mn alloys were exmained by means of the electrical and magnetical analyses. These effects on morphology and habit plane of martensite phase were also clarified by using optical and electron microscopes. The results are as follows : (1) Of the transformation temperatures of Fe-Mn alloys (Mn : 10.4〜13.0%), the value of Ms' (γ→ε) was nearly equal to that of the Ms" (ε→α). (2) Transformation temperatures decreased largely due to carbon addition and these temperatures (Ms' and Ms") were also nearly equal mutually in Fe-Mn-C alloys. (3) The α phase was formed by the two different processes (γ→ε→α and γ→α). (4) The habit planes of α phase in Fe-13.9% Mn alloy were nearly {225}_γ and nearly {112}_γ in the case of γ→ε→α and γ→α process. For Fe-12.9% Mn-0.4% C alloy, these were nearly {112}_γ and {259}_γ, respectively. (5) The lattice orientation relationships of the martensitic transformation in Fe-13.9% Mn alloy were (1^^-11)_γ//(0111)_ε, [101]_γ//[1^^-210]_ε, (0001)_ε//(110)_α, [011^^-0]_ε//[11^^-1^^-]_α and (121)_α//(13^^-11)_γ, [01^^-2]_α//[01^^-1]_γ.
東北大学の論文
1977-03-30