Results 21 to 30 of about 26,088 (258)

Effect of C on the Martensitic Transformation in Fe-C Alloys in the Presence of Pre-Existing Defects: A Molecular Dynamics Study

Crystals, 2019
Molecular dynamics simulations are used to investigate the atomic effects of carbon (C) addition in Fe on the martensitic phase transformation in the presence of pre-existing defects such as stacking faults and twin boundaries.
Shivraj Karewar, Jilt Sietsma, Maria J. Santofimia   +2 more
doaj   +1 more source

Fine microstructure formation in steel under ultrafast heating and cooling

Scientific Reports, 2022
This study evaluates phase transformation kinetics under ultrafast cooling using femtosecond X-ray diffraction for the operand measurements of the dislocation densities in Fe–0.1 mass% C–2.0 mass% Mn martensitic steel.
Mitsuharu Yonemura, Hitomi Nishibata, Rina Fujimura, Natsumi Ooura, Kengo Hata, Kazuki Fujiwara, Kaori Kawano, Itsuki Yamaguchi, Tomoyuki Terai, Yuichi Inubushi, Ichiro Inoue, Toshinori Yabuuchi, Kensuke Tono, Makina Yabashi   +13 more
doaj   +1 more source

Direct Observation of Martensitic Phase-Transformation Dynamics in Iron by 4D Single-Pulse Electron Microscopy [PDF]

, 2009
The in situ martensitic phase transformation of iron, a complex solid-state transition involving collective atomic displacement and interface movement, is studied in real time by means of four-dimensional (4D) electron microscopy.
Andrault D., Bain E. C., Balandin V. Y., Barwick B., Belonoshko A. B., Bhattacharya K., Bolm C., Bos C., Bos C., Boyes E. D., Christian J. W., Darken L. S., Darken L. S., Denton A. R., Entel P., Gray D. E., Hartland G. V., Hase M., Headley T. J., Kadau K., Kalantar D. H., Kohlhaas R., Krasko G. L., Kwon O.-H., LaGrange T., Laio A., Lide D. R., Massalski T. B., Nishiyama Z., Olson G. B., Osetsky Y. N., Porter D. A., Saxena S. K., Shorokhov D., Sinclair C. W., Tateyama S., Teodorescu V. S., Teodorescu V. S., Thomas J. M., Yaakobi B., Zhang J.-m   +40 more
core   +1 more source

Shape Memory Alloy Nanostructures With Coupled Dynamic Thermo-Mechanical Effects [PDF]

, 2014
Employing the Ginzburg-Landau phase-field theory, a new coupled dynamic thermo-mechanical 3D model has been proposed for modeling the cubic-to-tetragonal martensitic transformations in shape memory alloy (SMA) nanostructures.
Dhote, R., Gomez, H., Melnik, R., Zu, J.
core   +2 more sources

Effects of Annealing on the Martensitic Transformation of Ni-Based Ferromagnetic Shape Memory Heusler Alloys and Nanoparticles

Metals, 2015
We report on the effects of annealing on the martensitic phase transformation in the Ni-based Heusler system: Mn50Ni40Sn10 and Mn50Ni41Sn9 powder and Co50Ni21Ga32 nanoparticles.
Tina Fichtner, Changhai Wang, Aleksandr A. Levin, Guido Kreiner, Catalina Salazar Mejia, Simone Fabbrici, Franca Albertini, Claudia Felser   +7 more
doaj   +1 more source

Dynamic elastic properties and magnetic susceptibility across the austenite-martensite transformation in site-disordered ferromagnetic Ni-Fe-Al alloy [PDF]

, 2007
Besides permitting an accurate determination of the ferromagnetic-to-paramagnetic phase transition temperature and the characteristic temperatures for the beginning and end of the growth of martensite (austenite) phase at the expense of austenite ...
Otsuka K., P. K. Mukhopadhyay, S. N. Kaul   +2 more
core   +2 more sources

Towards the ab initio based theory of the phase transformations in iron and steel [PDF]

, 2017
Despite of the appearance of numerous new materials, the iron based alloys and steels continue to play an essential role in modern technology. The properties of a steel are determined by its structural state (ferrite, cementite, pearlite, bainite ...
Gornostyrev, Yu. N., Katsnelson, M. I., Razumov, I. K.   +2 more
core   +12 more sources

Microstructure and Martensitic Transformation Behavior in Thermal Cycled Equiatomic CuZr Shape Memory Alloy

Metals, 2019
Equiatomic CuZr alloy undergoes a martensitic transformation from the B2 parent phase to martensitic phases (P21/m and Cm) below 150 °C. We clarified the effect of the thermal cycling on the morphology and crystallography of martensite in equiatomic CuZr
Shota Hisada, Mitsuhiro Matsuda, Minoru Nishida, Carlo Alberto Biffi, Ausonio Tuissi   +4 more
doaj   +1 more source

Kinetics and the Effect of Thermal Treatments on the Martensitic Transformation and Magnetic Properties in Ni₄₉Mn₃₂Ga₁₉ Ferromagnetic Shape Memory Ribbons

Magnetochemistry, 2022
In our work, the kinetics of martensitic transformations and the influence of thermal treatments on martensitic transformations, as well as the related magnetic properties of the Ni49Mn32Ga19 ferromagnetic shape memory melt-spun ribbons, have been ...
Felicia Tolea, Bogdan Popescu, Cristina Bartha, Monica Enculescu, Mugurel Tolea, Mihaela Sofronie   +5 more
doaj   +1 more source

Adaptive Phase in Martensitic Transformation

Materials Transactions, JIM, 1992
It is shown that an adaptive transient phase can be formed along the martensitic transformation path to overcome thermodynamic and nucleation barriers caused by the transformation strain. A possible role of the adaptive phase in the thermal nucleation of the martensite is discussed.
Khachaturyan, A. G., Shapiro, S. M., Semenovskaya, S.   +2 more
openaire   +2 more sources