Results 11 to 20 of about 1,582,514 (178)

INTERNAL FRICTION PHENOMENA ASSOCIATED WITH DIFFUSIONLESS PHASE TRANSFORMATIONS IN ALLOYS

Le Journal de Physique Colloques, 1981
Internal friction and ultrasonic attenuation peaks associated with diffusionless phase transformations in alloys, such as thermoelastic martensites and others, were reviewed. They were discussed from the stand point of (1) Understanding the mechanism of the phase transformations and (2) Developing new alloy materials of high damping capacity for ...
K. Sugimoto
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A New Ordered Transformation-Induced Plasticity Enables Exceptional Strength and Ductility in a B2 Medium-Entropy Alloy. [PDF]

Adv Sci (Weinh)
A novel B2‐ordered Ti‐Zr‐V‐Al medium‐entropy intermetallic is developed through controlled metastability engineering, which activates an ordered TRIP effect via a new B2→D019‐α2 transformation with a distinctive {0001}α2//{110}B2, <11‐20>α2//<100>B2 orientation relationship. This alloy achieves an elongation of ∼7%, a strength of ∼1.1 GPa, and superior
Li C, Wu Y, Zheng B, Zhang X, Liu X, Song W, An N, Xiao C, Hui X.   +8 more
europepmc   +2 more sources

Nonequilibrium Thermodynamic Model of Diffusionless Transformation of an Austenite in Alloys on the Base of Iron [PDF]

METALLOFIZIKA I NOVEISHIE TEKHNOLOGII, 2018
Разработана неравновесная термодинамическая модель бездиффузионного превращения аустенита в железе и сплавах на его основе с учётом действующих в системе внутренних напряжений.
Бобырь, С.В.
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Effect of Valence Electron Concentration in High Entropy Shape Memory Alloys/ Review

Eurasian Journal of Science and Engineering, 2021
The shape memory effect is the ability to recover the shape after deformation on heating or stress. High entropy alloys were found by mixing an equiatomic number of complex components; nowadays, a new generation of un equiatomic components are produced ...
Sivar Aziz Baiz, Pshdar Ahmed Ibrahim
doaj   +1 more source

Ultra-low-velocity anomaly inside the Pacific Slab near the 410-km discontinuity

Communications Earth & Environment, 2023
The upper boundary of the mantle transition zone, known as the “410-km discontinuity”, is attributed to the phase transformation of the mineral olivine (α) to wadsleyite (β olivine).
Jiaqi Li, Thomas P. Ferrand, Tong Zhou, Jeroen Ritsema, Lars Stixrude, Min Chen   +5 more
doaj   +1 more source

6.1% Volumetric Negative Thermal Expansion Induced by the Reversible Reconstructive Phase Transition in Pb-Free Bi_1- _xLn_xCoO₃ (Ln: Lanthanoid). [PDF]

Adv Sci (Weinh)
Perovskite‐type oxide lanthanoid‐substituted BiCoO3 exhibits a reversible negative thermal expansion (NTE) originated from the coordination change from the CoO5 pyramid to the CoO6 octahedron due to melting of the dxy orbital ordering in the d6 electron configuration, and the 6.1% volume shrinkage in Bi0.82Nd0.18CoO3 is the largest ever observed in the
Sakai Y, Takahashi K, Wakazaki S, Nishikubo T, Miyake J, Koike T, Nagase T, Yamamoto T, Hatayama K, Mizumaki M, Azuma M.   +10 more
europepmc   +2 more sources

Graph similarity drives zeolite diffusionless transformations and intergrowth [PDF]

Nature Materials, 2019
Pre-peer review manuscript; 8 pages, 3 ...
Daniel Schwalbe-Koda, Zach Jensen, Elsa Olivetti, Rafael Gómez-Bombarelli   +3 more
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Thermoelastic properties on Cu-Zn-Al shape memory springs

Materials Research, 2010
This paper present a thermomechanical study of actuators in form of helical springs made from shape memory alloy wires that can work as actuator and/or as sensor. These abilities are due to the martensitic transformation.
Carlos Augusto do Nascimento Oliveira, Cezar Henrique Gonzalez, Carlos José de Araújo, Oscar Olímpio de Araújo Filho, Severino Leopoldino Urtiga Filho   +4 more
doaj   +1 more source

Driving diffusionless transformations in colloidal crystals using DNA handshaking [PDF]

Nature Communications, 2012
Many crystals, such as those of metals, can transform from one symmetry into another having lower free energy via a diffusionless transformation. Here we create binary colloidal crystals consisting of polymer microspheres, pulled together by DNA bridges, that induce specific, reversible attractions between two species of microspheres.
Marie T, Casey, Raynaldo T, Scarlett, W Benjamin, Rogers, Ian, Jenkins, Talid, Sinno, John C, Crocker   +5 more
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Evolution of the microstructure of cobalt during diffusionless transformation cycles [PDF]

Journal of Materials Research, 1990
Differential scanning calorimetry and transmission electron microscopy have been used to study thermal fatigue due to diffusionless phase transformation cycling in pure cobalt. Thermal cycling through the allotropic (hcp ↔ fcc) transformation results in a temperature shift of the calorimetric peaks, which means a delay of the transformation.
Munier, A., Bidaux, J. E., Schaller, R., Esnouf, C.   +3 more
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