A superelastic alloy formed from common elements operates over a wide temperature window.

Ferromagnetic shape memory alloys with a body-centered-cubic ordered structure in Ni–Ga–Fe system have been developed. The the composition range of Ni 27 at. % Ga (20–22 %)Fe exhibit thermoelastic martensitic transformation from B2 and/or an L21 parent to martensite phase, seven-layer modulated (14M) and five-layer (10M) structure, ferromagnetic state. phase transforms at about 970 K during cooling, degree order is increased by annealing 773 K, resulting increase both starting Curie...

It is desirable to fabricate colorful coatings that have nonfading properties and are environmentally friendly. In this study, a novel approach for creating structural color from monodisperse silica particles presented. The coating films, formed an array of with small amount black additive, easily prepared by simple electrophoretic deposition (EPD) technique. arrangement the particle controlled varying applied voltage time. iridescence, is, angular dependence, dramatically changes array. A...

The effects of the introduction γ (A1) phase into β (B2) on mechanical and shape memory properties in ferromagnetic Co-Ni-Al alloys with β+γ two-phase structure were investigated by cold-rolling, tensile tests, bending tests. found to be improved an increase volume fraction phase, Co-33 at%Ni-26 at%Al alloy Vγ=36% exhibited excellent cold workability a critical reduction ratio 40%. Although degree recovery decreases it can enhanced training. Since have several advantages such as cost...

The γ' solvus temperature, the microhardness and martensitic transformation temperatures were examined for Fe-Ni-Co-Al-based shape memory alloys. It was found that Fe-28Ni-17Co-11.5Al-2X (X=Ti, Nb Ta) alloys have a relatively high temperature they show hardness when aged at 600 °C, especially in case of Ta Alloy compositions to obtain hardness, small hysteresis complete reversible evaluated as being Ni>28%, Co>13%, Al>10% Ta>2.5%, most suitable aging °C. Grain boundary precipitation NiAl-B2...

Owing to its lightweight and excellent shock-absorbing properties, aluminum foam is used in automotive parts construction materials. If a nondestructive quality assurance method can be established, the application of will further expanded. In this study, we attempted estimate plateau stress via machine learning (deep learning) using X-ray computed tomography (CT) images foam. The stresses estimated by those actually obtained compression test were almost identical. Consequently, it was shown...

In this study, we propose a new signed-digit-to-canonical-signed-digit recoding circuit based on parallel prefix structures. Several articles have been devoted to the study of canonical signed-digit circuits. However, most those re-code from 2's complement binary number representation. Unlike those, our proposed architectures convert The structure is somewhat different in previous articles, because each digit input accompanied by its sign. We evaluate and compare it with conditional sum...

This brief describes a segmented structure to deal with inverse square root in floating-point digital calculation arithmetic, based on Taylor-Series expansion; it uses only the small number of their expansion terms achieve fast evaluation these functions high precision. Taylor-series expansions are examined for several center points convergence ranges, and algorithm trade-offs among accuracy, numbers multiplications/additions/subtractions LUT sizes shown; designer can choose optimal his...

An electrical resistance change method is widely accepted for the identification of damage in electrically conductive composites. To identify delamination location more precisely, a new involving standardization measured changes has been proposed. In present paper, was applied to cross-ply and quasi-isotropic laminated beams, effectiveness confirmed experimentally. Comparing results two different applicability confirmed. Moreover, effect stacking sequence investigated Although standardized...

The feasibility of hot stamping high-strength steel sheet with resistance heating was examined. Resistance and experiments were conducted using rectangular blanks sheet, SPFC980Y, 1.2mm thick, 80mm wide 130mm long. resistance-heated between a pair parallel electrodes placed 120mm away from each other, an AC power supply, temperature measured by thermography. function input energy control adopted for the performance blank holders multiple pins designed eliminating unequal contact achieving...

Resistance heating performance in some shaped blanks of high-strength steel sheet is examined by experiment and FE simulation, the feasibility effectiveness application resistance to hot press forming are discussed. The followings made clear through this study. (1) A uniformly distributed current density essential uniform blank heating. (2) For a certain blank, no matter how electrodes disposed, difficult. (3) shape suitable for single pair parallel restricted rectangle.(4) In case heated...

In this study, the mechanical properties of aluminum foam were classified by machine learning from their X-ray computed tomography (CT) images. It was found that samples with high and low compressive strengths can be an accuracy rate more than 95%. addition, it indicated further improved increasing amount training data. From these results, is expected quality assurance method established nondestructively acquiring images manufactured product.

Signed-digit (SD) number representation systems have been studied for high-speed arithmetic. One important property of the SD system is possibility performing addition without long carry chain. However, many numbers logic elements are required when and such an adder realized on a circuit. In this study, we propose new binary system. The proposed uses more circuit area than conventional adders those ASIC. 20% less field-programmable gate array (FPGA) which made up 4-input 1-output LUT as...