Materials Literature
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Rotating bending fatigue tests were conducted to investigate the effect of zirconia shot peening on fatigue properties of Ti-6Al-4V ELI alloy. Specimen was treated in three different shot peening conditions. As a result, the fatigue lives of shot peened specimen were longer life than non-peened specimen. Fish eyes wer…
The present study newly attempts the numerical simulation of mechanical sensors using IPMCs (ionic polymer-metal composites). The generated electric potential of mechanical sensing mode is very much smaller than the supplied electric potential of actuating mode with respect to the same displacement and structure. Furt…
Пусть X - произвольное топологическое пространство и P - множество положительных действительных чисел. Множество всех положительных функций на X с поточечными операциями сложения и умножения функций образует полуполе U(X). Подалгеброй A полуполя U(X) называется произвольное его подмножество, такое, что A ⋅ A ⊆ A, A +…
Hydroxyapatite (HA)/β-tricalcium phosphate (β-TCP) composites attracts attentions as bone implant materials. Mixing of HA and β-TCP powder is one of the fabrication methods of HA/β-TCP. This method enables the control the ratio of content of β-TCP easier. However, it is difficult to obtain dense composites. In this st…
We did a study it to cut a carbon material with higher accuracy by the ELID method. Conventionally, when higher accuracy is required, what is performed in two processes "cutting" and "finish" is common. We aimed at the development of the processing process to complete "cutting-1 and "finish" at the same time by adding…
It is believed that when a liquid drop drips on the same liquid bath, a liquid drop immediately coalesces with the same liquid due to surface tension when they touch each other. But they do not sometimes. The drop can float on the liquid bath surface without coalescing. It is a surprising phenomenon considered physica…
Recent experimental studies of repetitive nanosecond pulse discharges demonstrate their significant potential for plasma assisted combustion, high-speed flow control, and low-temperature plasma chemistry. The main advantage of using these discharges for ignition is efficient generation of electronically excited and ra…
Diesel spray formation that is a dominant phenomenological event for performance of diesel engine, has been received much attention for engine improvement. Vaporized fuel preparation in a combustion cavity is controlled by a breakup process of a high-speed fuel jet and diesel spray development. Auto-ignition of diesel…
Shape memory polymer (SMP) is soft and its configuration can be easily changed into a desired configuration at temperatures above the glass-transition temperature (T_g), and the configuration can be fixed by cooling to temperatures below Tg. In addition, the original configuration can be recovered by heating to temper…
Self-healing fiber-reinforced ceramics (shFRC) are widely expected to be advanced structural materials for aerospace engineering. The self-healing function in shFRC appeared at 1200℃ for 1 h and 1000℃ for 50 h respectively. shFRC can appear autonomic self-healing if the shFRC is employed as turbine blade operated at t…
In this study, the damage process of Thermal Barrier Coatings (TBC) and Porous-TBC (P-TBC) subjected to tensile load at a high-temperature was clarified, and the influence of test temperature and porous structure on crack initiation strength and interface strength was examined based upon the test results. Yttria-stabi…
Generation of ultrahigh -density ultrafine bubbles by UltrafineGALF technology and apPlication for impurities removal on wafer surface
The Japan Soclety of Mechanlcal Englneers
L'objectif de ce travail de thèse est de synthétiser et d'optimiser de nouveaux catalyseurs hétérogènes pour la dépollution de l'air. Ces catalyseurs sont des nanomatériaux, issus d'un procédé sol/gel au voisinage de la température ambiante et en solution aqueuse. L'ajustement de certains paramètres de synthèse permet…
Effect of tensile stress on the corrosion potential of high pressure die cast aluminum alloy was examined by the tensile test in a corrosive environment with the electrochemical measurement. The aluminum alloy has an oxide film as a corrosion barrier, but the oxide film may partially break by the mechanical stress and…
This paper reports the preliminarily experimental results of shock wave propagation visualization by hypervelocity impact. An experimental investigation of hypervelocity impact was performed by using a ballistic range at Institute of Fluid Science, Tohoku University. The process of shock wave propagation by hyperveloc…
Evaluation ofthe interaction between screw dislocation and solute Si in Fe -Si alloy
With downsizing of automobile electrical components, the sliding conditions of gears and clutches have become more severe. As a response to this, PTFE powder is used in lubricating oils as an additive. However, the relationship between the properties of PTFE powder and the friction characteristics of lubricants contai…
以Ti、B4C、Ni、Al粉末为原料，通过自蔓延高温反应合成工艺（SHS）制备TiC-TiB2-NiAl复合材料，研究NiAl含量对反应产物的物相组成及组织结构的影响。结果表明：Ti＋B4C＋Ni＋Al粉末SHS反应产物的物相组成为TiB2、TiC和NiAl，随着Ni＋Al添加量的增多，NiAl相的衍射峰强度逐渐增强；TiB2、TiC和NiAl在基体中呈现不同的形态，其中TiB2呈六边形或长条状，TiC呈圆形，NiAl填充在TiC和TiB2颗粒之间；随着NiAl含量的增加，TiC-TiB2-NiAl 复合材料的晶粒逐渐被细化，致密度和抗压强度均被提高，TiC 的形态由不规则形状转变为圆形。复合材料的断裂方式由单纯的沿晶断裂转变为混…
U petrokemijskoj industriji svakodnevno su prisutni sve veći zahtjevi na operativna i eksploatacijska svojstva ugrađenih materijala. Potencijalni materijal za primjenu u ovoj grani industrije je i mikrolegirani čelik API 5L X80 dobiven termo-mehanički kontroliranim postupkom valjanja. Pri zavarivanju spomenutog čelika…