Results 81 to 90 of about 13,933 (129)

Geometry of polycrystals and microstructure

MATEC Web of Conferences, 2015
We investigate the geometry of polycrystals, showing that for polycrystals formed of convex grains the interior grains are polyhedral, while for polycrystals with general grain geometry the set of triple points is small.
Ball John M., Carstensen Carsten
doaj   +1 more source

Deciphering M-T diagram of shape memory Heusler alloys: reentrance, plateau and beyond

, 2017
We present our recent results on temperature behaviour of magnetization observed in Ni_47Mn_39In_14 Heusler alloys. Three regions can be distinguished in the M-T diagram: (I) low temperature martensitic phase (with the Curie temperature T_CM = 140 K ...
Araujo-Moreira, F. M., Ari-Gur, P., Cordova, C., de Lima, O. F., Gomes, A. M., Kamantsev, A. P., Koledov, V. V., Mashirov, A. V., Sergeenkov, S., Shavrov, V. G., Takeuchi, A. Y.   +10 more
core   +1 more source

Alteration of Phase Transformation Behavior and Prior Austenite Grain Structure Due to Elevated Tramp Element Concentrations in a Hypoeutectoid Steel

steel research international, EarlyView.
The phase transformation behavior of a hypoeutectoid steel is studied in comparison with alloys containing higher concentrations of tramp elements, simulating high recycling rates. The examination of microstructures reveals that the tramp elements facilitate the formation of displacive phases along with retained austenite.
Lukas Hatzenbichler, Marek Gocnik, Phillip Haslberger, Matthew Galler, Andreas Stark, Oleksandr Glushko, Jozef Keckes, Ronald Schnitzer   +7 more
wiley   +1 more source

Crystal Dislocations: Their Impact on Physical Properties of Crystals

Crystals, 2018
It is rare to find technical applications involving a material of any crystal structure that is not impacted by dislocations—which affect the material’s mechanical properties, interfaces, martensitic phase transformations, crystal growth, and
Peter Lagerlof
doaj   +1 more source

Observation of a continuous phase transition in a shape-memory alloy

, 2008
Elastic neutron-scattering, inelastic x-ray scattering, specific-heat, and pressure-dependent electrical transport measurements have been made on single crystals of AuZn and Au_{0.52}Zn_{0.48} above and below their martensitic transition temperatures ...
A. Alatas, B. L. Winn, B. Mihaila, C. P. Opeil, E. K. H. Salje, E. K. H. Salje, H. Pops, J. C. Lashley, J. L. Smith, J. J. Binney, M. E. Manley, M. S. Wechsler, P. Riseborough, P. Toledano, P. W. Duerig, R. A. Fisher, R. C. Albers, S. M. Shapiro, T. Makita, T. Park, W. Ratcliff   +20 more
core   +1 more source

Influence of Higher Tramp Element Level on the Weldability of Automotive Steels

steel research international, EarlyView.
The use of green recycled steels is constantly expanding in the automotive industry. The increase in tramp elements resulting from the recycling of steel is problematic. Tramp elements can lead to a negative influence on the weldability. To understand the influence, the welding properties of three green steels are characterized. The potential limits of
Elias Gebhard Vogt, Patrick Veyel, Lars Gebel, Christian Meyer, Robert Thomas, Michael Thomas, Christoph Herrmann   +6 more
wiley   +1 more source

Elastic and thermodynamic properties of the shape-memory alloy AuZn

, 2001
The current work reports on the elastic shear moduli, internal friction, and the specific heat of the B2 cubic ordered alloy AuZn as a function of temperature. Measurements were made on single-crystal and polycrystalline samples using Resonant Ultrasound
A. Migliori, B. E. Lang, B. F.Woodfield, D. J. Thoma, F. Chu, J. Boerio-Goates, J. C. Lashley, M. Lopez, T. W. Darling   +8 more
core   +1 more source

Influence of Heat Treatment and Scan Rotation on the Microstructure of Hot Work Tool Steel Manufactured using Laser Powder Bed Fusion

steel research international, EarlyView.
The study investigates the influence of heat treatment and scan rotation on the microstructure of a modified H13 tool steel manufactured using laser powder bed fusion. Key findings include the refinement of prior austenite grains (PAGs) due to recrystallization and carbide pinning, and the significant impact of scan rotation on the size distribution of
Negar Panahi, Fengxiang Lin, Christos Oikonomou, Mikael Grehk   +3 more
wiley   +1 more source

Effect of Cyclic Martensitic γ–ϵ–γ Transformations on Diffusion Characteristics of Carbon in an Iron–Manganese Alloy

Успехи физики металлов, 2018
Carbon-diffusion characteristics in metastable Г18C2 iron–manganese alloy after the cyclic γ–ϵ–γ (f.c.c.–h.c.p.–f.c.c.) martensitic transitions were investigated using the radioactive-isotope method. As shown, the process of carbon transport acceleration
V. Y. Bondar, V. E. Danilchenko, V. F. Mazanko, O. V. Filatov, V. E. Iakovlev
doaj   +1 more source

Comment on 'A new nanoscale metastable iron phase in carbon steels' [PDF]

, 2015
We show that the selected area diffraction patterns presented in a recent paper (T. Liu et al. Sci. Rep. 2015 5, 15331) do not prove the existence of a new hexagonal phase in martensitic steels.
Cayron, Cyril
core   +1 more source