Электронный каталог

Статья

Sun, L.-Y.
Structural Evolution in Fe–15Mn Steel Under Thermal Cycling / L.-Y.Sun, S.V.Sumnikov, R.N.Vasin, I.A.Bobrikov, G.D.Bokuchava, A.M.Balagurov, [a.o.]. – Text : electronic // Journal of Iron and Steel Research International. – 2026. – Vol. 33, No. 5. – P. 148. – URL: https://doi.org/10.1007/s42243-026-01728-0. – Bibliogr.: 24.

The martensitic transition sequence and microstructure evolution in a homogenized Fe–15Mn alloy under thermal cycling, involving a thermal body-centered cubic *a'-martensite, hexagonal close-packed *e-martensite, and face-centered cubic *g austenite, were characterized by neutron diffraction and transmission electron microscope. The *e *> *a' transition is observed for the first time during heating. Upon cooling, *g *> *e and *g *> *a' transitions occur concomitantly. The transition rate of the *g *> *e is higher than that of the *g *> *a' in the early stage of the phase transition. The Fe–15Mn alloy exhibits a pronounced volume effect of phase transition (1.6% for *e *> *g, 1.8% for *a' *> *g, and 4.2% for *e *> *a'), which induces an obvious lattice mismatch. The sharp increase in the volume fraction of e-martensite after thermal cycling is attributed to the formation of abundant stacking faults and the pre-existing *a'-martensite within the alloy.



ОИЯИ = ОИЯИ (JINR)2026
Спец.(статьи,препринты) = С 342 г1 - Замедление и диффузия нейтронов. Дифракция
Бюллетени = 27/026